US20020155587A1 - System and method for testing a biological sample - Google Patents
System and method for testing a biological sample Download PDFInfo
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- US20020155587A1 US20020155587A1 US09/839,629 US83962901A US2002155587A1 US 20020155587 A1 US20020155587 A1 US 20020155587A1 US 83962901 A US83962901 A US 83962901A US 2002155587 A1 US2002155587 A1 US 2002155587A1
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B20/00—ICT specially adapted for functional genomics or proteomics, e.g. genotype-phenotype associations
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B20/00—ICT specially adapted for functional genomics or proteomics, e.g. genotype-phenotype associations
- G16B20/20—Allele or variant detection, e.g. single nucleotide polymorphism [SNP] detection
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B50/00—ICT programming tools or database systems specially adapted for bioinformatics
- G16B50/20—Heterogeneous data integration
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16B—BIOINFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR GENETIC OR PROTEIN-RELATED DATA PROCESSING IN COMPUTATIONAL MOLECULAR BIOLOGY
- G16B50/00—ICT programming tools or database systems specially adapted for bioinformatics
Definitions
- the field of the present invention is testing methods for biological samples.
- a system having a processor is used to implement the disclosed testing method.
- Instruments such as the mass spectrometer, are now routinely used to assist in identifying components of a biological sample.
- the MALDI time-of-flight (TOF) mass spectrometer has proven particularly useful in making biological determinations, such as genotyping or identifying single nucleotide polymorphisms.
- the MALDI TOF mass spectrometer generally operates by directing an energy beam at a target spot on a biological sample.
- the energy beam disintegrates the biological material at the target spot, with the disintegrated component material being hurled toward a measurement module.
- the lighter component material arrives at the measurement module before the heavier component material.
- the measurement module captures the component material, and generates a data set indicative of the mass of the component material sensed.
- the data set is generated as a two dimensional spectrum, with the x-axis representing a mass number, and the y-axis representing a quantity number.
- the data which is often presented as a data spectrum, typically has peaks positioned on a generally exponentially decaying baseline. Each peak should ideally represent the presence of a component of the biological sample.
- the data spectrum is replete with noise, so an accurate determination of biological components is challenging. Indeed, it takes an experienced operator to accurately read and interpret a data spectrum.
- the efforts of even the best trained human operator can suffer from inaccuracies and errors. Since the results derived from the data spectrum are often used in health care decisions, mistakes can be devastating. Therefore, operators are trained to make a determination only when certain of the result. In such a manner, a great number of tests result in no-calls, where the operator cannot clearly identify a data result.
- mass spectrometers risks an unacceptably large number of inaccurate calls if the operator is applying a rather loose standard to the data spectrum.
- mass spectrometers becomes highly inefficient if the operator discards a large number of tests due to an inability to confidently make a call.
- the mass spectrometer may provide a level of data filtering.
- the data filtering attenuates a set magnitude of noise, thereby more conspicuously exposing valid peaks.
- such a filtering technique may actually mask important valid peaks, resulting in an incorrect analysis.
- SNPs single nucleotide polymorphisms
- mass spectrometers are now being used to identify single nucleotide polymorphisms (SNPs).
- SNPs may produce only slight peaks on the data spectrum, which are easily missed by an operator or buried in background noise.
- mass spectrometers are also now being used for multiplexing, where multiple gene reactions may be present in a single sample. In such a manner, the resulting peaks may be smaller, more difficult to identify, and there may be more combinations of false readings. With such a complicated data spectrum, it is becoming more difficult for an operator to confidently determine if a valid peak exists for a particular genetic component.
- the mass spectrometer therefore, provides a data spectrum that is difficult for an operator to interpret. Even under the best of conditions, the operator is likely to either make identifications where the call should not have been made, or is likely to discard good acquired data because of perceived ambiguity. Accordingly, there exists a need for a more efficient and accurate method and system for identifying a biological sample.
- the method for testing a biological sample in accordance with the invention utilizes a testing system.
- the testing system generally comprises a processor and an instrument that is configured to acquire data from a biological sample.
- the instrument acquires data from the biological sample, and the processor compares the acquired data to predefined data criteria. Responsive to comparing the acquired data to the data criteria, the instrument may be adjusted, and another data set acquired.
- a mass spectrometer acquires data from a biological sample. The acquired data is compared to predefined spectrum criteria. Responsive to the comparison, the mass spectrometer may be directed to resample the biological sample or proceed to another sample.
- the disclosed method and system for testing a biological sample provides automated control of a mass spectrometer. More particularly, the new testing method enables a highly accurate determination of a biological sample with minimal manual intervention. Accordingly, biological samples may be identified and diagnostic tests performed with a degree of precision, speed, and accuracy not available from known testing systems.
- FIG. 1 is a block diagram of a testing system in accordance with the present invention.
- FIG. 2 is a flowchart of a testing process in accordance with the present invention.
- FIG. 3 is a flowchart of a testing process in accordance with the present invention that illustrates automated control of a testing instrument
- FIG. 4 is a flowchart of a testing process in accordance with the present invention that illustrates over-sampling a biological sample
- FIG. 5 is a flowchart of a testing process in accordance with the present invention that illustrates acquiring data from multiple samples to establish the presence of a biological relationship
- FIG. 6 is an illustration of a computer display showing results from a testing system in accordance with the present invention.
- the testing system 10 contains a real time (RT) workstation 12 which includes a series of controllers that retrieve assay design parameters from the database server 13 and directs the acquisition and processing of data indicative of the biological sample from the mass spectrometer 14 . The processed data or genotyping results are then downloaded into a directory in the database server 13 .
- RT real time
- the testing system 10 has a RT workstation 12 that may be, for example, a computer system having storage and computational components, including one or more controllers.
- the RT workstation is made up of one controller 30 which acquires assay design specifications from the database server 13 , includes another controller 31 which automatically aligns the laser on the chip using an image system, controls the motor movement of the assay substrate at the mass spectrometer, and acquires the data signal directly from the mass spectrometer, and includes another controller 32 that communicates with the controller 31 by receiving a data signal and providing instruction for additional data acquisition. Additional data acquisition may be dependent on the quality of the data previously obtained.
- the data is preferably stored on a local hard drive of the RT workstation 12 until the results from all the samples are compiled.
- the compiled data is stored in a directory in the database server 13 .
- the RT workstation 12 preferably has a display 16 for visually communicating test results and status information.
- the RT workstation 12 is a computer, such as an IBM compatible personal computer system, communicating with the mass spectrometer using a known communication standard, such as a parallel or serial interface. It will be appreciated that the workstation and controllers may be alternatively embodied.
- the RT workstation 12 may be integral to the mass spectrometer 14 or another system component, or the workstation and controller 12 may be placed at a remote location from the mass spectrometer.
- the network topography such as a wide area network or a local area network, would provide a communication path between the mass spectrometer 14 and the RT workstation 12 .
- the RT workstation 12 is preferably a standalone computer device, it will be appreciated that one or more of the controllers may be, for example, a microprocessor or other programmable circuit device capable of performing a programmed process.
- the mass spectrometer 14 is preferably a MALDI Time-of-Flight (TOF) instrument.
- TOF Time-of-Flight
- the mass spectrometer 14 is configured with an interface to communicate with the workstation controller 12 .
- the interface preferably conforms to a known data communication standard, for ease of connection.
- a single interface may enable the controller 12 to both receive data from the mass spectrometer 14 and send instructions to the mass spectrometer 14 , two or more separate interfaces may be used.
- the preferred test system 10 incorporates a MALDI TOF mass spectrometer, it will be appreciated that other types of analytical instruments may be used.
- the testing system 10 may provide the database server 13 with one or more databases, such as database 18 , database 19 , database 20 , database 21 and database 22 stored in direct access storage devices. It will be appreciated that other forms of data storage may be used. However, a structured database provides a convenient format for storing and retrieving data. In a preferred embodiment one of the databases, such as database 18 , stores assay design information, a database 19 stores genotyping profiles, a database 20 stores allelotyping profiles, database 21 stores sample identification information, while the other database 22 stores test results for later analysis. It will be appreciated that fewer or more databases may be used to store assay and test information.
- the database server 13 may also contain one or more controllers such as controller 23 and controller 24 .
- the controller 23 monitors the data acquisition of the individual samples on the assay substrate or chip. Once the data is received from all samples in the assay, the data monitoring controller 23 downloads all or part of the assay information and stores the information in a directory in the test results database 22 . The controller 24 imports the data into a directory in the results database 22 .
- the RT workstation 12 has sufficient processing ability to extract assay design information from the assay design database 18 , and to convert the assay design information into a format for providing specific directions to the mass spectrometer 14 .
- the controller may access the database 18 and request a specific assay design.
- the specific assay may be set up to provide a microtiter plate with hundreds, or even thousands, of samples on each plate. The test may require that samples be tested in a specific order, and based upon the result from previous tests, the order may be adjusted, or some samples may even be eliminated from the assay.
- the RT workstation receives the assay design information and converts the assay design information into commands for the mass spectrometer 14 . Upon starting the assay, the RT workstation 12 sends initialization commands to the mass spectrometer 14 consistent with the assay design.
- Extracting an assay design from a database and generating mass spectrometer commands may be a time consuming and processor intensive operation. It would be particularly undesirable for the extraction process to interfere with the more real-time control of the mass spectrometer. Accordingly, it is preferred that the RT workstation 12 perform a database extraction process, and database storage functions, as background tasks, or at a time when such tasks will not materially interfere with the more real-time control of the mass spectrometer 14 .
- real-time control refers to the ability of the RT workstation 12 to receive data from the mass spectrometer 14 , process the data, and provide command direction to the mass spectrometer in an automated and efficient manner.
- the RT workstation 12 defines physical map of the biological samples on the assay plate or chip by manual input of the information by the operator or an automated scanning system such as a bar code reader.
- a mass spectrometer 14 receives the biological sample for analysis and generates an electrical data signal representative of genotype information associated with the sample tested under direction from the real time workstation 12 .
- the instrument is initialized when it is provided with specific data acquisition parameters, either manually or in a default mode.
- the acquisition parameters may include the number of laser shots per spot, the maximum number of raster per sample, and voltage, delay time, calibration constants and other parameters that will be well-known to those skilled in the art.
- the mass spectrometer is initialized according to test assay parameters, and acquires data indicative of the biological samples. More particularly, the data acquired by the mass spectrometer is typically in the form of an electronic data spectrum. The electronic data spectrum can be retrieved by the RT workstation.
- Biological samples are analyzed when the RT workstation 12 directs the automatic alignment of the mass spectrometer laser on assay surface or chip using an imaging system and controls movement of the laser from sample to sample and assay surface to assay surface when multiple assay surfaces or chips are held in a multi-component holder.
- Biological or genotyping information is acquired directly from the mass spectrometer 14 by the RT workstation 12 .
- the signal is converted into amass data spectrum by the RT workstation 12 where a genotype is determined. If the sample genotype cannot be called, the RT workstation 12 will recognize the situation and may direct an adjustment to the mass spectrometer 14 . For example, if the acquired spectrum has an unacceptably high signal to noise ratio, the workstation controller 12 may direct the mass spectrometer 14 to test the same sample again, but may adjust the mass spectrometer 14 to direct its beam at a different spot on the sample, or may select alternative power settings or measurement filters.
- the controller 12 may direct the mass spectrometer 14 to take a series of data sets from the same sample until the standard deviation in the aggregate results achieves a desired degree of certainty. It should be understood that, even though the same sample may be tested multiple times, each test will be taken from a unique spot on the sample.
- the method of testing first predefines spectrum criteria that predicts the presence of a biological relationship in block 21 .
- the predefined spectrum criteria will vary depending on the assay being run.
- the spectrum criteria may be set to assure a minimum allelic ratio is exceeded.
- the spectrum criteria may be set to reject acquired data where the allelic ratio is below a threshold, such as 5%.
- the presence of specific markers may be required to validate acquired data.
- the spectrum criteria may require that a peak exceed a signal to noise figure before accepting the acquired data as valid.
- statistical methods may be applied to the acquired data, or sets of acquired data, to determine if a particular peak is statistically signification.
- block 22 shows that the assay design is defined, and then preferably stored in a database for use in controlling the instrument.
- the instrument is a MALDI TOF mass spectrometer. It will be appreciated that other instruments may be substituted.
- the defined assay design is used to generate the initial settings for the instrument, and then is further used to direct the instrument during the assay test.
- Biological samples are then positioned in block 23 for test in the instrument.
- the samples are positioned preferably on a holder such as a microtiter plate. It will be appreciated that other types of holders, such as test tubes or chips, may be substituted for a microtiter plate holder. Although it is more convenient to place all samples for one assay on a single holder, samples for a single assay may be placed on multiple holders.
- the holder is positioned in the instrument, as indicated in block 24 .
- the holder may be manually positioned, or may be positioned under robotic control. If the holder is robotically controlled, then information extracted from the assay design may be used to direct the robotic control to place the proper holder in the instrument. If manually positioned, a visual display may be used to assist the human operator in identifying and verifying the proper holder.
- Blocks 25 - 28 represent the real time control of the instrument and will be described further below. This real time control enables the automated and efficient operation of the instrument, and provides accuracies and repeatabilities in test results that are not available in known systems.
- the instrument acquires a data set from a biological sample.
- the acquired data is in the form of an acquired data spectrum.
- the data set is generated by first finding height of each peak, then extrapolating noise profile, and finding noise of each peak, next calculating signal to noise ration, and finding residual error, and calculating and adjusting signal to noise ratio, and developing a probability profile, and determining peak probabilities, and determining allelic penalty, and adjusting peak probability by allelic penalty, and calculating genotype probabilities, and testing ratio of genotype probabilities.
- the acquired data is evaluated in block 26 .
- the acquired data is compared against the spectrum criteria previously defined.
- this comparison can be, for example, a comparison of peak strength, peak position, markers, s/n ratio, allelic ratio, or a statistical calculation.
- the comparison may be multi-dimensional, for example, requiring first that a particular marker be located and then testing that an appropriate signal to noise ratio exists.
- the comparison step may use data from multiple acquired data sets, for example, to calculate the standard deviation for the group. Accordingly, the comparison will compare the standard deviation in the group of data sets to determine if the results should be derived from the newly acquired data.
- the workstation controller adjusts the instrument in block 27 . For example, if the signal to noise ratio was too low in a first data set, the instrument may be adjusted to test the same sample, but at a different spot on the sample. By moving to a new target spot, new data may be acquired for the same sample. In testing the new spot, it is quite possible that different or better analytical results may be found. Thus, taking a reading at a second spot may enable making an analytical call on a sample when it was not possible with only a single spot test. Further, testing additional spots on an individual sample may permit the calculation of aggregate results with a lower error rate than relying solely on a single test spot.
- the overall assay test can be manipulated to provide a requisite level of accuracy and tolerance. Accordingly, the maximum number of samples can be accurately called for a particular assay, but yet time and system resources are not wasted by testing more spots than necessary.
- the method returns to block 25 to acquire the next data set.
- the next data set may be for the same sample, or the instrument may have been adjusted to the next sample. After testing is completed, processing moves to block 28 .
- Block 28 shows that the results from the acquired data are analyzed to determine the presence of an object biological relationship.
- the assay may be attempting to locate particular single nucleotide polymorphisms (SNPs), or may be allele typing, or may be genotyping. Irrespective of the particular biological relationship searched for, the relative success of the search may be used by the FIG. 2 testing method in directing further data acquisitions. For example, if in a multiple sample assay, the biological relationship is ruled out after only the first sample, then the method can be directed to skip testing the rest of the samples in the assay and move on.
- SNPs single nucleotide polymorphisms
- block 28 can be used to determine if the ambiguity can be removed by increasing the certainty of the results for a particular sample. If so, the test can be directed by the workstation to automatically take additional data acquisitions and attempt to salvage the assay. Without such an automated and intelligent process, the assay would be rejected. Accordingly, the FIG. 2 testing method provides a higher level of calls, and a higher level of call certainty than with known testing methods.
- the FIG. 3 testing method 40 generally has a control loop 42 , an initialization loop 41 , and a results loop 43 .
- the control loop 42 is responsible for acquiring data sets, comparing the data sets to predefined spectrum criteria, and adjusting the instrument responsive to the evaluation of the acquired data.
- the control loop must operate efficiently enough to permit the timely operation of the overall test system. Therefore, certain of the setup and storage functions have been off-loaded to the background loops 41 and 43 . It will be appreciated that more or less functionality may be placed in the background loops to accommodate different response times needed in the control loop 42 .
- the initialization loop 41 is a background loop that permits storage of assay design and plate information in block 44 .
- the assay design and plate information is stored in a database form.
- the database of assay design and plate information may be used by multiple test systems, and may be accessed remotely. In such a manner a remote researcher may define an assay in a single database, and that newly defined assay may be operated on multiple test systems.
- the extraction process is performed in block 45 .
- the extracting step is preferably a background step, the extraction process may be performed for a next assay while the control loop 42 is actively performing an assay.
- the extracted information from block 45 may be sent to block 51 to start the control loop 42 for a next assay.
- the information from block 45 is received in block 51 , where the information is used to initialize the instrument.
- the instrument is a MALDI TOF mass spectrometer.
- the initialization commands may include identifying the first sample to test, the proper power settings, and the desired filtering for the data.
- a sample is selected for test in block 52 , and data is acquired from the test sample in block 53 .
- the acquired data may be sufficiently processed to determine target characteristics for the acquired data. For example, if signal to noise ratio is an important indication of test quality, then a signal to noise ratio may be calculated for the acquired data. More particularly, the acquired data will be processed to facilitate comparison with predefined spectrum criteria.
- the predefined spectrum criteria define the analytical characteristics for good data.
- the acquired data is compared to the predefined spectrum criteria. If the acquired data is good, a “YES” outcome at block 54 , then the acquired data is further processed in block 57 to extract biological information, and the data is formatted and displayed in block 58 . However, if the acquired data is not good, a “NO” outcome at block 54 , then block 55 asks if the maximum number of spots have been shot for this sample. For example, a typical mass spectrometer can take a maximum of about 15 to 20 shots on any given sample. To assure the integrity of the test, it may be advisable to set the maximum to a safe number, such as 10.
- the sample is not further processed if the maximum shots have been exceeded. Thus, if less than 10 spots have been shot, a “NO” outcome at block 55 , then the instrument is adjusted to a new spot in block 56 , and data is acquired on the new spot in block 53 . In block 54 , the newly acquired data is compared to the spectrum criteria. Alternatively, block 54 can use aggregated data from multiple test spots to determine if the aggregated data is good.
- block 59 asks if there are more samples in the assay. If so, a “YES” outcome at block 59 , then the instrument is adjusted in block 61 to shoot the next sample. If all the samples have been tested, a “NO” outcome at block 59 , then the control loop 42 resets and a next assay is initiated.
- the results from the assay are passed to the background results loop 43 .
- the results loop 43 may perform additional post processing on the data in block 63 , which may include a manual review of the results.
- the data and results may then be stored in block 65 .
- the data and results are stored in a database that is accessible from remote locations so a remote researcher or other test operators may review the results.
- the testing method 70 allows an assay designer to establish a minimum standard for each biological sample in block 71 . More particularly, the testing method 70 is directed to increasing the confidence in the results from each sample. As discussed above, a typical mass spectrometer can take a data set from multiple spots on a single biological sample. The testing method 70 enables the test to dramatically increase the confidence for each sample, while minimizing the number of testing samples that must be acquired.
- a biological sample is selected in block 72 , and a data set is acquired in block 73 .
- the acquired data is evaluated against the data criteria set for the sample.
- the data criteria may expect a signal to noise ratio to exceed a floor value.
- each data set acquired for a particular sample is compared against the data criteria.
- data collected from multiple shots in the same sample may be used in the comparison.
- the data criteria may require that the standard deviation between spots on the same sample not exceed a particular value.
- the comparison step could include determining the standard deviation for all spots in the single sample to determine if confidence is sufficiently high to call the sample. It will be appreciated that the comparison step may entail a wide range of analytical and algorithmic calculations, either on individual data sets or aggregates of data sets.
- the testing method 70 permits setting the data criteria in a manner that minimizes the number of data acquisitions.
- the data criteria could be accept a sample when a single data set has a signal to noise ratio meeting one level, or meeting a lower level for aggregate data sets.
- the comparison could be set to accept sample data if the standard deviation between two successive shots is less than 5%, or accept the data if the standard deviation is less than 7% for 3 shots, or less than 10% for 4 or more shots.
- Such flexible data criteria permit the assay designer to set a high degree of confidence with a minimum of data readings. Accordingly, the test system 70 operates at high degree of efficiency and accuracy as compared to known systems.
- a “YES” outcome at block 75 the results are stored in block 76 , preferably in a database, and the instrument adjusted to move to the next sample in block 77 . Accordingly, a new sample is selected in block 72 .
- block 78 asks if there are any remaining spots on the sample. If unshot spots exist, a “NO” outcome at block 78 , the instrument is adjusted in block 79 to acquire data from a new spot, and the data is acquired in block 73 . If the data criteria are not met, and there are no unshot spots, a “YES” outcome at block 78 , then that particular sample is rejected, and the test moves on to a new sample.
- the diagnostic testing method is directed to finding a relationship among a set of samples that proves a particular biological relationship exists. For example, certain clinical diagnostics may look at multiple samples from an individual before identifying that the individual is at risk for a particular disease.
- the diagnostic testing method enables such a clinical diagnosis at a level of certainty and a level of efficiency not available in known systems.
- the diagnostic testing method 100 receives an assay design and relationship criteria at block 101 .
- the relationship criteria define the range of values and certainties where a relationship can be identified.
- the relationship is the likelihood that a particular individual will contact a particular disease. Due to the seriousness of the identification, it is crucial that such an identification be made only under the most confident conditions. Accordingly, known systems have required redundancies and over-testing to build confidence sufficient to make such a drastic announcement regarding an individual's health.
- a set of samples is identified for testing for the relationship. As there are likely several, even tens of samples to test, it is also likely that the set of samples may be present on multiple holders. Thus the testing method 100 should account for instructing an operator or a robot to deliver and load different holders as needed.
- testing system 100 incorporates aspects of previously discussed testing system 70 to increase the confidence that the results from an individual sample are robust. The previously discussed method of over-sampling a single biological sample can dramatically increase the confidence in the data from a single sample.
- the acquired data is evaluated to determine if it supports the object relationship. If the data does not support the object relationship, a “NO” outcome, then it is reported that the relationship does not exist in the set in block 111 , and the test moves on to the next set of samples in block 110 . Due to the high degree of confidence in sample results, it is possible for the testing method 100 to reject the entire sample and move to the next set. Accordingly, the testing method 100 may operate efficiently.
- block 106 finds that the data does support the relationship, a “YES” outcome, then block 107 asks if the data acquired thus far conclusively proves the relationship exists. If enough data has been collected, and the relationship proved, a “YES” outcome at block 107 , then block 112 reports that the relationship exists, and the test moves on to the next set of samples. Thus, the testing method 100 only takes the necessary number of data acquisitions to call a diagnosis, enabling efficient operation.
- block 107 finds that the collected data does not prove the biological relationship, a “NO” outcome, then block 108 asks if there are any more samples to be tested in the sample set. If no more samples exist, a “NO” outcome at block 108 , then block 113 reports that the relationship could not be proved, and the test moves on to the next sample set. If there are more samples to be tested, then the instrument is adjusted to the next sample in block 109 , and data acquired from the new sample in block 104 .
- FIG. 6 shows an example user display 130 for a test system.
- the user display 130 is preferably presented on a computer monitor connected to an IBM compatible computer system.
- the user display 130 is presented using a Microsoft® Windows® compatible display program.
- the user display 130 has a spectrum window 132 for displaying a data spectrum of the most recently acquired data set.
- the spectrum window 132 enables an operator to watch, in near real-time, the data being collected by the instrument. If multiple spots are shot for a particular sample, each successive data spectrum may be displayed in a different color so variations between spots is easily identified.
- the user display also has a holder representation 134 .
- the holder representation of FIG. 6 shows individual sample wells in a microtiter plate.
- a well representation shows the wells in a physical microtiter plate holder.
- a results display 138 shows assay data and a results quality display 140 shows run data for data sets. Accordingly, as the test progresses, an operator may identify certain systemic problems. For example, if all wells in a particular column fail, then there may be a problem with the syringe used to fill that particular column.
- the user interface 130 also has a sample view 136 which shows a live image of the sample currently being tested. With this view, an operator may visually identify spots that have been used within a particular sample. Also, the operator may be able to identify certain systemic problems, such as a too small sample being deposited into certain wells.
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Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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US09/839,629 US20020155587A1 (en) | 2001-04-20 | 2001-04-20 | System and method for testing a biological sample |
JP2002584237A JP2005509844A (ja) | 2001-04-20 | 2002-04-22 | 生物学的サンプルを試験するためのシステムおよび方法 |
PCT/US2002/012903 WO2002086794A1 (en) | 2001-04-20 | 2002-04-22 | Systems and methods for testing a biological sample |
US10/128,680 US8315805B2 (en) | 2001-04-20 | 2002-04-22 | Systems and methods for testing a biological sample |
EP02764326.1A EP1390900B1 (de) | 2001-04-20 | 2002-04-22 | Systeme und verfahren zum prüfen einer biologischen probe |
CA002444655A CA2444655A1 (en) | 2001-04-20 | 2002-04-22 | Systems and methods for testing a biological sample |
JP2007098271A JP2007225618A (ja) | 2001-04-20 | 2007-04-04 | 生物学的サンプルを試験するためのシステムおよび方法 |
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US09/839,629 US20020155587A1 (en) | 2001-04-20 | 2001-04-20 | System and method for testing a biological sample |
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US10/128,680 Expired - Lifetime US8315805B2 (en) | 2001-04-20 | 2002-04-22 | Systems and methods for testing a biological sample |
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US11768185B2 (en) * | 2019-08-01 | 2023-09-26 | Wyatt Technology Corporation | Analyzing data collected by analytical instruments |
US11614509B2 (en) | 2019-09-27 | 2023-03-28 | Q Bio, Inc. | Maxwell parallel imaging |
US11131735B2 (en) | 2019-09-27 | 2021-09-28 | Q Bio, Inc. | Maxwell parallel imaging |
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Also Published As
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EP1390900A4 (de) | 2007-08-29 |
WO2002086794A1 (en) | 2002-10-31 |
US8315805B2 (en) | 2012-11-20 |
EP1390900A1 (de) | 2004-02-25 |
CA2444655A1 (en) | 2002-10-31 |
US20030033091A1 (en) | 2003-02-13 |
JP2007225618A (ja) | 2007-09-06 |
JP2005509844A (ja) | 2005-04-14 |
EP1390900B1 (de) | 2015-06-24 |
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