US20120238032A1 - Lab on a chip - Google Patents

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Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
  • G01N15/10—Investigating individual particles
  • G01N15/1023—Microstructural devices for non-optical measurement
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
  • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
  • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
  • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
  • B01L3/502715—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
  • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
  • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
  • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
  • B01L3/50273—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the means or forces applied to move the fluids
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
  • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
  • F04B19/006—Micropumps
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N1/00—Sampling; Preparing specimens for investigation
  • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
  • G01N15/10—Investigating individual particles
  • G01N15/14—Optical investigation techniques, e.g. flow cytometry
  • G01N15/1434—Optical arrangements
  • G01N15/1436—Optical arrangements the optical arrangement forming an integrated apparatus with the sample container, e.g. a flow cell
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
  • G01N15/10—Investigating individual particles
  • G01N15/14—Optical investigation techniques, e.g. flow cytometry
  • G01N15/1456—Optical investigation techniques, e.g. flow cytometry without spatial resolution of the texture or inner structure of the particle, e.g. processing of pulse signals
  • G01N15/1459—Optical investigation techniques, e.g. flow cytometry without spatial resolution of the texture or inner structure of the particle, e.g. processing of pulse signals the analysis being performed on a sample stream
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
  • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
  • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
  • B01L2200/10—Integrating sample preparation and analysis in single entity, e.g. lab-on-a-chip concept
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L2300/00—Additional constructional details
  • B01L2300/06—Auxiliary integrated devices, integrated components
  • B01L2300/0627—Sensor or part of a sensor is integrated
  • B01L2300/0654—Lenses; Optical fibres
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L2300/00—Additional constructional details
  • B01L2300/08—Geometry, shape and general structure
  • B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
  • B01L2300/0867—Multiple inlets and one sample wells, e.g. mixing, dilution
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L2300/00—Additional constructional details
  • B01L2300/18—Means for temperature control
  • B01L2300/1861—Means for temperature control using radiation
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L2400/00—Moving or stopping fluids
  • B01L2400/04—Moving fluids with specific forces or mechanical means
  • B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
  • B01L2400/0442—Moving fluids with specific forces or mechanical means specific forces thermal energy, e.g. vaporisation, bubble jet
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L2400/00—Moving or stopping fluids
  • B01L2400/04—Moving fluids with specific forces or mechanical means
  • B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
  • B01L2400/0481—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure squeezing of channels or chambers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
  • B01L2400/00—Moving or stopping fluids
  • B01L2400/06—Valves, specific forms thereof
  • B01L2400/0677—Valves, specific forms thereof phase change valves; Meltable, freezing, dissolvable plugs; Destructible barriers

Definitions

• the present disclosure relates to the field of integrated circuits, and specifically to the use of integrated circuits in examining fluid samples. Still more particularly, the present disclosure relates to the use of integrated circuits to capture images of components of a fluid sample.
• a Lab On a Chip comprises a sample inlet for receiving a liquid sample.
• the LOC also comprises a Sample Preparation Module (SPM) coupled to the sample inlet, a microchannel coupled to the SPM, and an optic module optically proximate to the microchannel.
• the optic module holds multiple lenses, each of which has a different effective focal length, such that all fields of focus within the microchannel are covered as objects suspended within the liquid sample pass through the microchannel.
• a method and/or computer program product analyzes a test sample on a Lab On a Chip (LOC).
• LOC Lab On a Chip
• a sample preparation module in the LOC receives a fluid sample, from which a prepared fluid sample is created.
• the prepared fluid sample which includes multiple suspended objects, passes through a microchannel that is situated between a light source and a lens chamber in the LOC.
• the lens chamber holds multiple lenses, each of which has a different effective fixed focal length.
• An optic image of each of the multiple suspended objects is created and converted into a digital image.
• FIG. 1 depicts an exemplary simple Lab On a Chip (LOC) as contemplated in one embodiment of the present disclosure
• FIG. 2 illustrates additional detail of one embodiment of an optic module depicted in FIG. 1 ;
• FIG. 3 depicts additional detail of another embodiment of the optic module depicted in FIG. 1 ;
• FIG. 4 illustrates additional detail of one embodiment of a sample preparation module depicted in FIG. 1 ;
• FIG. 5 illustrates additional detail of another embodiment of the sample preparation module depicted in FIG. 1 ;
• FIG. 6 illustrates additional detail of another embodiment of the sample preparation module depicted in FIG. 1 ;
• FIG. 7 is a high-level flow chart of one or more steps performed by a processor to analyze a test sample on a LOC.
• FIG. 8 depicts an exemplary computer system that may be utilized by one or more of the components depicted in FIGS. 1-6 .
• aspects of the present invention may be embodied as a system, method or computer program product. Accordingly, aspects of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a “circuit,” “module” or “system.” Furthermore, aspects of the present invention may take the form of a computer program product embodied in one or more computer readable medium(s) having computer readable program code embodied thereon.
• the computer readable medium may be a computer readable signal medium or a computer readable storage medium.
• a computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
• a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
• a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof.
• a computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
• Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including, but not limited to, wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
• Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C++ or the like and conventional procedural programming languages, such as the “C” programming language or similar programming languages.
• the program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server.
• the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
• LAN local area network
• WAN wide area network
• Internet Service Provider for example, AT&T, MCI, Sprint, EarthLink, MSN, GTE, etc.
• These computer program instructions may also be stored in a computer readable medium that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the computer readable medium produce an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
• the computer program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
• LOC 102 is an on-chip device that, in one embodiment, is pre-packaged with some or all of the components depicted in FIGS. 1-6 and 8 .
• LOC 102 may be powered by an internal power supply (e.g., a battery—not shown) or an external power supply (e.g., via a power port—also not shown). Regardless of how LOC 102 is powered, it is capable of autonomously, or in conjunction with ancillary logic such as a coupled computer/server, optically analyzing a material sample.
• LOC 102 is capable of capturing visual images of objects that are suspended in a liquid sample, such as a medical serum sample, a whole blood sample, a chemical process sample, a water sample, etc.
• a liquid sample such as a medical serum sample, a whole blood sample, a chemical process sample, a water sample, etc.
• suspended objects may be blood cells, parasites, metallic particles, or any other material that is capable of being photographed using the components, or their equivalent, described herein.
• the fluid/liquid sample is inserted into a sample inlet 104 by injection, capillary action, gravity, etc.
• the sample contains both a transport medium (e.g., serum) as well as objects (e.g., red blood cells) to be examined/visualized.
• a transport medium e.g., serum
• objects e.g., red blood cells
• the sample must be prepared before being visually examined. This preparation may include the introduction of dyes, catalysts, coagulators, etc. (referred to as “reagents” in the present disclosure) into the sample in order to make the objects within the fluid more conducive to being photographed and/or visually inspected. As described in further detail below, this preparation is performed in a Sample Preparation Module (SPM) 106 .
• SPM Sample Preparation Module
• the sample Once the sample has been prepared with SPM 106 , it passes through a microchannel 108 , and is then preferably discarded into an internal effluent reservoir 110 , in order to avoid contaminating the user of the LOC with the prepared sample.
• the sample can simply pass through the LOC 102 and out a process sample outlet (not shown), assuming that the sample, processed or unprocessed, is either not harmful to persons or the environment, or else is properly disposed of.
• the sample While passing through the microchannel 108 , the sample is illuminated by a light source 112 , which may be a set of Light Emitting Diodes (LEDs), luminescent material, natural ambient light, etc. If the light source 112 is a luminescent material, then it can be activated by mechanically mixing one or more materials together, energizing (e.g., hitting with a certain frequency of electromagnetic energy) a photoluminescent material, etc. Any variation of the light source 112 described herein can be under the control of a control unit 118 .
• LEDs Light Emitting Diodes
• I/O interface 116 Input/Output interface 116 , which may be coupled to a data port, external monitor, an external computer/server, etc. (none of which are depicted). I/O interface 116 also allows for commands to be sent to and feedback received from a control unit 118 , which controls the operations of the SPM 106 , light source 112 , and optic module 114 .
• the optic module 114 shown in FIG. 1 comprises a lens chamber 202 , a photovoltaic matrix layer 204 , a Charge-Coupled Device (CCD) 206 , and an image processing logic 212 .
• the optic module 114 shown in FIG. 1 comprises a lens chamber 202 , a photovoltaic matrix layer 204 , a Charge-Coupled Device (CCD) 206 , and an image processing logic 212 .
• CCD Charge-Coupled Device
• lens chamber 202 contains multiple lenses L 1 -L 6 . While only six lenses are depicted within lens chamber 202 , it is understood that the actual number of lenses may be as few as 2 or as many as deemed necessary by the designer.
• Each of the lenses L 1 -L 6 has a different focal length, depicted as corresponding focal lengths f 1 -f 6 , which describe the distance from the lenses to areas within the microchannel 108 where objects will be in clear focus (i.e., crisp and not blurred). These areas within the microchannel 108 are referred to as strata, with each strata having a different depth of field (or field of focus) associated with a corresponding lens.
• each of the lenses L 1 -L 6 has a different focal length (and thus a different depth of field). These different focal lengths ensure that at least one of the lenses L 1 -L 6 will be able to focus/create a crisp image of each of the objects 210 a - f , depending on the strata (i.e., position within the microchannel relative to the lenses L 1 -L 6 ) in which each of the objects 210 a - f is located as it flows through the microchannel.
• lens L 1 has a focal length of f 1 .
• lens L 1 is able to focus in on an object (e.g., object 210 a ) that is physically located near the distance f 1 from lens L 1 .
• object 210 a an object that is physically located near the distance f 1 from lens L 1 .
• light is transmitted from light source 112 and traverses through object 210 a , and is then focused by lens L 1 to create an optic image of object 210 a that is crisp and clear (in focus).
• lens L 2 is unable to create a clearly focused image of object 210 a , since the focal length f 2 does not include the depth of field in which object 210 a is situated as is moves through the microchannel 108 at a given strata.
• lens L 2 is able to create a crisp image of object 210 b , which is within the depth of field 12 of lens L 2 .
• lens L 1 is able to focus the image of object 210 a
• lens L 2 is able to focus the image of object 210 b
• lens L 3 is able to focus the image of object 210 c
• lens L 4 is able to focus the image of object 210 d
• lens L 6 is able to focus the image of object 210 f .
• object 210 e is too large to fit within the depth of field of any single lens from lenses L 1 -L 6 .
• “snapshots” of object 210 e are taken by using each of the lenses L 1 -L 6 as object 210 e passes by. These snapshots result in six images ( 1 )-( 6 ) being created with the use of respective lenses L 1 -L 6 . These six images are then combined to create a composite focused image of object 210 e.
• the lenses L 1 -L 6 focus the light from light source 112 that has traversed through (or reflected off) the objects 210 a - f in order to create focused visual images of the objects 210 a - f .
• These focused light images pass through to a photovoltaic matrix layer 204 , which contains material that converts the light energy from the focused light images into electrical energy of comparable levels. That is, the focused light image is made up of varying hues and intensities of light. These varying hues/intensities are quantified by the photovoltaic matrix layer 204 as corresponding levels of electrical energy, which are then passed on to a Charge-Coupled Device (CCD) 206 .
• CCD Charge-Coupled Device
• CCD 206 moves these electrical charges to an image processing logic 212 , where the charges are manipulated into a digital value.
• the CCD 206 moves the electrical charges by “shifting” the charges between stages within the CCD 206 , one at a time, into the image processing logic 212 . More specifically, CCD 206 shifts charges between capacitive “bins” within CCD 206 in order to transfer charges between bins.
• a CCD can be thought of as a “shift register” in which charges, rather than simple ones and zeros, from bins are shifted across a matrix.
• the lens chamber 202 , the photovoltaic matrix layer 204 , the CCD 206 , and the image processing logic 212 make up an image processing component of the optic module 114 .
• the control unit 118 depicted in FIG. 1 controls the timing at which images are captured by the optic module 114 .
• this timing is performed by measuring (or controlling) the flow rate of the liquid sample 200 through the microchannel 108 .
• This timing 1 ensures that each of the objects 210 a - f will be in focus at some point in time as it passes over the lenses L 1 -L 6 , and in the case of a counter mechanism being part of the control unit 118 , can be used to 2) avoid counting a same object twice.
• the control unit 118 is able to 1) time the capture of the images generated by the optic module 114 such that every object will be photographed in focus, and to 2) determine that object 210 a , which was captured in focus by lens L 1 and counted as it passed over lens L 1 , is the same object 210 a that is out of focus in the image captured by lens L 2 , and thus should not be recounted.
• the different focal lengths f 1 -f 6 may be the result of different physical shapes of their corresponding lenses L 1 -L 6 , as depicted. In one embodiment, these different focal lengths f 1 -f 6 are the result of different light refracting properties of the different lenses L 1 -L 6 , which may actually have the same physical shapes.
• a same type/shape of lens is used at all positions, but simply repositioned to create different depths of field to create different effective focal lengths.
• SPM 400 additional detail of one embodiment of the SPM 106 shown in FIG. 1 is depicted as SPM 400 .
• SPM 400 Within SPM 400 is a mixing chamber 402 .
• a tuned energy source 404 is able to selectively cause reagents (i.e., chemical reagents, enzymes, coagulators, dyes, etc. needed to prepare objects for viewing within the LOC) to mix with the sample coming in from the sample inlet 104 .
• reagents i.e., chemical reagents, enzymes, coagulators, dyes, etc. needed to prepare objects for viewing within the LOC
• this mixing is performed by simply injecting such reagents from a reservoir (not shown) into the mixing chamber 402 , and allowing the energy from the tuned energy source 404 (e.g., a laser of a certain frequency/temperature, a resistor or other electronic heating element tuned to a certain temperature, etc.) to cause the materials to mix together due to energy/heat shock.
• the tuned energy source 404 e.g., a laser of a certain frequency/temperature, a resistor or other electronic heating element tuned to a certain temperature, etc.
• the mixing of the reagents is caused by selectively heating pre-loaded (near or at the time of the fabrication of the LOC 102 ) reagents found in reagent chamber 406 and/or reagent chamber 410 .
• pre-loaded near or at the time of the fabrication of the LOC 102
• reagents found in reagent chamber 406 and/or reagent chamber 410 .
• a reagent and/or the liquid carrier medium within reagent chamber 406 will heat up if exposed to a certain frequency of light (e.g., a laser) from tuned energy source 404 , while this same frequency of light causes the reagent/carrier medium within reagent chamber 410 to remain cool and quiescent.
• a certain frequency of light e.g., a laser
• the reagent within reagent chamber 406 will be forced across semi-permeable membrane 408 due to heat-induced expansion, while the reagent within reagent chamber 410 will remain contained within reagent chamber 410 by semi-permeable membrane 412 .
• reagents from both reagent chambers 406 and 410 may be released into mixing chamber 402 if they are excited by one or more frequencies of laser energy that cause them to expand and traverse across their respective semi-permeable membranes.
• Logic within the LOC may execute code that controls which reagent chambers release their respective reagents into the mixing chamber 402 . If there are three reagent chambers that respectively hold reagents A, B, and C for use in creating a mixture/preparation D, then an example of such code is found in the following pseudo code:
• the reagent within a reagent chamber may be susceptible to damage if overheated.
• a pressure chamber can be used.
• SPM 500 may include a pressure chamber 502 , which holds only non-reagent material that nonetheless will expand if exposed to a certain level of heat, frequency of light, etc. from the tuned energy source 504 .
• pressure chamber 502 when energy from the tuned energy source 504 strikes pressure chamber 502 , the contents of pressure chamber 502 expand across a semi-permeable membrane 506 , forcing the reagent within reagent chamber 406 to be pushed through a semi-permeable membrane 508 and into the mixing chamber 402 , while allowing the reagent within reagent chamber 406 to remain cool and otherwise unaffected by the tuned energy source 504 . That is, by pre-loading into pressure chamber 502 a fluid that expands at a temperature that is below that which could damage the reagent within reagent chamber 406 , then that reagent is unharmed/unaltered.
• pressure chamber 502 by pre-loading into pressure chamber 502 a fluid that expands when exposed to a light frequency that has no adverse effect on the reagent within reagent chamber 406 , then that reagent is likewise unharmed/unaltered.
• Other pressure/reagent chamber pairs may selectively introduce other reagents into the mixing chamber 402 .
• a tuned heat source can drive a micro-pump, which can be used to 1) mix reagents and/or 2) propel the sample through the SPM 106 shown in FIG. 1 .
• a micro-pump can be used to 1) mix reagents and/or 2) propel the sample through the SPM 106 shown in FIG. 1 .
• SPM 600 shown in FIG. 6 The sample fluid enters a mixing chamber 602 and is prepared as described above.
• the tuned energy source 608 causes liquid within hydraulic reservoir 604 to expand, turning an impeller within a miniature pump such as the depicted pump 606 .
• hydraulic reservoir 604 is fluidly coupled to pump 606 (i.e., fluid from hydraulic reservoir 604 is able to pass through piping 610 from hydraulic reservoir 604 to pump 606 ), pump 606 is able to pull the sample liquid out of the mixing chamber 602 and push it into the microchannel 208 .
• pump 606 is able to pull the sample liquid out of the mixing chamber 602 and push it into the microchannel 208 .
• the same operation can be used to mix reagents with sample material within the mixing chamber 602 by pumping reagents directly into the mixing chamber 602 .
• a fluid sample is introduced into a sample preparation module on a Lab On a Chip (LOC) to create a prepared fluid sample 704 .
• LOC Lab On a Chip
• This preparation can be performed through the use of mixing chambers, reagent chambers, pumps, etc. as described above.
• this preparation is under the control of a control unit (e.g., control unit 118 shown in FIG. 1 ), which includes processing logic (e.g., a processor) to control a tuned energy source, pump, etc. shown above.
• the prepared fluid sample is then passed through a microchannel that is positioned near a light source and a lens chamber.
• the lens chamber holds multiple lenses, each of which have a different effective fixed focal length. That is, each lens may have a shape/composition that causes it to have a different focal length than other lenses within the lens chamber (as depicted in FIG. 2 ), or duplicate copies of a same lens may be physically repositioned in order to create different effective focal lengths (as depicted in FIG. 3 ).
• images of passing-by objects within the prepared fluid sample are generated using the multiple lenses in the lens chamber and a photovoltaic matrix layer adjacent to the lens chamber. If any of the objects are larger than the focal length of any one of the multiple fixed-focal length lenses (query block 710 ), then a composite image of that large object is generated using snapshots from multiple lenses (block 712 ). Once the image, either singular or composite, is generated by the lens(es) and the photovoltaic matrix layer, the images are transmitted to a CCD layer and an image processing logic to be converted into a digital image. The digital image is then transmitted to an I/O interface on the LOC (block 714 ) for transmission to a monitor, printer, external computer/server, etc. The process ends at terminator block 716 .
• FIG. 8 there is depicted a block diagram of an exemplary computer 802 , which may be utilized by the present invention.
• the exemplary architecture including both depicted hardware and software, shown for and within computer 802 may be utilized by software deploying server 850 and/or a Lab On a Chip (LOC) 852 .
• the LOC 852 may utilize a processor such as that found in processing unit 804 , a memory such as system memory 836 , a flash memory such as flash memory 824 (e.g., an EPROM) to function as the control unit 118 depicted in FIG. 1 .
• a processor such as that found in processing unit 804
• a memory such as system memory 836
• flash memory such as flash memory 824 (e.g., an EPROM)
• Computer 802 includes a processor 804 that is coupled to a system bus 806 .
• Processor 804 may utilize one or more processors, each of which has one or more processor cores.
• a video adapter 808 which drives/supports a display 810 , is also coupled to system bus 806 .
• System bus 806 is coupled via a bus bridge 812 to an input/output (I/O) bus 814 .
• An I/O interface 816 is coupled to I/O bus 814 .
• I/O interface 816 affords communication with various I/O devices, including a keyboard 818 , a mouse 820 , a media tray 822 (which may include storage devices such as CD-ROM drives, multi-media interfaces, etc.), a flash memory 824 (e.g., a flash drive, an Erasable Programmable Read Only Memory—EPROM, a Read Only Memory (ROM), etc.), and external USB port(s) 826 . While the format of the ports connected to I/O interface 816 may be any known to those skilled in the art of computer architecture, in one embodiment some or all of these ports are universal serial bus (USB) ports.
• USB universal serial bus
• Network 828 may be an external network such as the Internet, or an internal network such as an Ethernet or a virtual private network (VPN).
• VPN virtual private network
• a hard drive interface 832 is also coupled to system bus 806 .
• Hard drive interface 832 interfaces with a hard drive 834 .
• hard drive 834 populates a system memory 836 , which is also coupled to system bus 806 .
• System memory is defined as a lowest level of volatile memory in computer 802 . This volatile memory includes additional higher levels of volatile memory (not shown), including, but not limited to, cache memory, registers and buffers.
• Data that populates system memory 836 includes computer 802 's operating system (OS) 838 and application programs 844 .
• OS operating system
• OS 838 includes a shell 840 , for providing transparent user access to resources such as application programs 844 .
• shell 840 is a program that provides an interpreter and an interface between the user and the operating system. More specifically, shell 840 executes commands that are entered into a command line user interface or from a file.
• shell 840 also called a command processor, is generally the highest level of the operating system software hierarchy and serves as a command interpreter. The shell provides a system prompt, interprets commands entered by keyboard, mouse, or other user input media, and sends the interpreted command(s) to the appropriate lower levels of the operating system (e.g., a kernel 842 ) for processing.
• a kernel 842 the appropriate lower levels of the operating system for processing.
• shell 840 is a text-based, line-oriented user interface, the present invention will equally well support other user interface modes, such as graphical, voice, gestural, etc.
• OS 838 also includes kernel 842 , which includes lower levels of functionality for OS 838 , including providing essential services required by other parts of OS 838 and application programs 844 , including memory management, process and task management, disk management, and mouse and keyboard management.
• kernel 842 includes lower levels of functionality for OS 838 , including providing essential services required by other parts of OS 838 and application programs 844 , including memory management, process and task management, disk management, and mouse and keyboard management.
• Application programs 844 include a renderer, shown in exemplary manner as a browser 846 .
• Browser 846 includes program modules and instructions enabling a world wide web (WWW) client (i.e., computer 802 ) to send and receive network messages to the Internet using hypertext transfer protocol (HTTP) messaging, thus enabling communication with software deploying server 850 and other described computer systems.
• WWW world wide web
• HTTP hypertext transfer protocol
• Application programs 844 in computer 802 's system memory also include a Lab On a Chip Control Program (LOCCP) 848 .
• LOCCP 848 includes code for implementing the processes described below, including those described in FIGS. 1-7 .
• computer 802 is able to download LOCCP 848 from software deploying server 850 , including in an on-demand basis, wherein the code in LOCCP 848 is not downloaded until needed for execution to define and/or implement the improved enterprise architecture described herein.
• software deploying server 850 performs all of the functions associated with the present invention (including execution of LOCCP 848 ), thus freeing computer 802 from having to use its own internal computing resources to execute LOCCP 848 .
• computer 802 may include alternate memory storage devices such as magnetic cassettes, digital versatile disks (DVDs), Bernoulli cartridges, and the like. These and other variations are intended to be within the spirit and scope of the present invention.
• each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s).
• the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
• VHDL VHSIC Hardware Description Language
• VHDL is an exemplary design-entry language for Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), and other similar electronic devices.
• FPGA Field Programmable Gate Arrays
• ASIC Application Specific Integrated Circuits
• any software-implemented method described herein may be emulated by a hardware-based VHDL program, which is then applied to a VHDL chip, such as a FPGA.

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• 2011
  • 2011-03-18 US US13/051,605 patent/US20120238032A1/en not_active Abandoned
• 2012
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