US20190051402A1 - Systems and methods for independent assessment of image data - Google Patents
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H10/00—ICT specially adapted for the handling or processing of patient-related medical or healthcare data
- G16H10/20—ICT specially adapted for the handling or processing of patient-related medical or healthcare data for electronic clinical trials or questionnaires
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H30/00—ICT specially adapted for the handling or processing of medical images
- G16H30/20—ICT specially adapted for the handling or processing of medical images for handling medical images, e.g. DICOM, HL7 or PACS
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- G06F19/00—
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
- G16H30/00—ICT specially adapted for the handling or processing of medical images
- G16H30/40—ICT specially adapted for the handling or processing of medical images for processing medical images, e.g. editing
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- G—PHYSICS
- G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
- G16Z—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS, NOT OTHERWISE PROVIDED FOR
- G16Z99/00—Subject matter not provided for in other main groups of this subclass
Definitions
- the present invention relates to digital image processing systems and methods.
- the invention relates to digital image processing systems and methods for managing medical images.
- Medical images can be acquired for various reasons and uses. Medical images can be acquired for diagnostic and treatment purposes within a hospital setting. In particular, a physician may request that a patient undergo a radiological examination so that the physician can diagnose the patient or track the progress or treatment of a previously-diagnosed issue.
- the images are reviewed by the physician or other healthcare professionals (e.g., a radiologist).
- the reviewer uses an image viewer to assess the images and make measurements and annotations associated with the images.
- the reviewer also provides a report summarizing his or her findings, which often includes a dictated narrative.
- the measurements, annotations, and report are stored and associated with the acquired images.
- the original reviewer's measurements, annotations, and report are available. Making this information available to subsequent reviewers aids informed treatment of a patient based on all available information.
- Medical images can also be acquired as part of a clinical trial. For example, during a clinical trial for a new cancer drug, trial participants may undergo one or more radiological examinations to determine how a cancerous tumor reacts to the new drug. Images acquired during a clinical trial are typically handled differently than images acquired in a hospital setting.
- a reviewer in a clinical trial provides an objective quantitative analysis that relies on evidence-based measurements, such as biomarkers. To ensure the accuracy of these objective observations and measurements, images acquired as part of a clinical trial are often blindly reviewed (e.g., in tandem) by at least two reviewers. The results from the reviewers are compared to determine whether the results match.
- the independent assessments are saved for subsequent use and/or review. If the results match, one or more additional reviewers may be used to evaluate the images as a tie-breaker. In the end, all of the independent assessments are saved for subsequent use and/or review.
- embodiments of the invention provide systems and methods for managing image assessment within a clinical trial setting.
- the invention provides a method for managing at least one medical image.
- the method includes receiving information regarding the at least one medical image, and determining, at a first processor, a number of copies needed of the at least one medical image based on the information regarding the at least one medical image.
- the method also includes generating, at the first processor, a unique identifier for each copy and providing, to a second processor, the number of copies needed and the unique identifiers.
- the second processor generates the number of copies of the at least one medical image, modifies each of the copies based on one of the unique identifiers, and stores the copies to at least one image storage device.
- the invention provides a method for managing at least one medical image, wherein the at least one medical image includes image data and metadata.
- the method includes generating, at a processor, a number of copies of the at least one medical image, wherein the number of copies is equal to a number of independent reviewers associated with the at least one medical image and each of the copies includes the image data and the metadata.
- the method also includes modifying the metadata of each of the copies to include a unique identifier, and storing the copies to at least one image storage device.
- the invention provides a system for managing at least one medical image.
- the system includes a first processor configured to receive information regarding the at least one medical image, wherein the at least one medical image includes image data and metadata, and to determine a number of copies needed of the at least one medical image based on the information regarding the at least one medical image.
- the first processor is also configured to generate a number of unique identifiers, the number of unique identifiers equal to the number of copies needed, and to provide, to a second processor, the number of copies needed and the unique identifiers.
- the second processor generates the number of copies of the at least one medical image, modifies each of the copies to include one of the unique identifiers, and stores the copies to at least one image storage device.
- FIG. 1 illustrates a digital image processing system according to one embodiment of the invention.
- FIG. 2 illustrates a controller included in the digital image processing system of FIG. 1 .
- FIGS. 3 and 4 are flow charts illustrating methods performed by the digital image processing system of FIG. 1 .
- RIS Radiology Information System
- PACS Picture Archiving and Communication System
- the RIS runs in parallel with the PACS in a streamlined, linear process that automates the standard process of assessing images in a hospital setting.
- the PACS allows individuals to access stored images and any associated annotations, measurements, or reports for a particular radiological examination or a particular patient. Accordingly, as previously noted, although clinical trials also assess medical images, clinical trials often cannot use the standard products and systems used in a hospital setting.
- FIG. 1 illustrates a digital image processing system 10 .
- the system 10 can be used to manage images acquired for a clinical trial.
- the system 10 includes one or more acquisition devices 12 , an editor 14 (e.g., a digital imaging and communications in medicine (“DICOM”) editor), a controller 16 , and an image storage device 18 .
- the acquisition devices 12 acquire digital images of a patient and transmit the images to the editor 14 .
- the editor 14 communicates with the controller 16 to manage the processing of acquired images, which includes storing the images in the image storage device 18 .
- DICOM digital imaging and communications in medicine
- a reviewer e.g., an individual reviewing the acquired images for the clinical trial
- a computing device executing a viewer application hereinafter referred to as a “viewing device 26 ”
- Viewer applications are well-known in the medical image industry and are provided by numerous vendors. The available viewer applications provide different functionality and different compatibility with particular image storage devices 18 .
- the image storage device 18 includes a PACS, a RIS, and/or a clinical image management system (“CIMS”), which are well-known in the medical industry.
- CIMS clinical image management system
- the image storage device 18 can include multiple devices (e.g., multiple servers or databases).
- a plurality of networks 20 , 22 , and 24 connect the acquisition devices 12 , the editor 14 , the controller 16 , the image storage device 18 , and the viewing device 26 .
- the networks 20 , 22 , and 24 can include the Internet, a wide area-network (“WAN”), a local-area network (“LAN”), or combinations thereof.
- the networks 20 , 22 , and 24 can include wired connections, wireless connections, or combinations thereof. It should be understood that in some embodiments, two or more of the components can be combined into a single system and connected by internal connections as opposed to networks.
- the controller 16 , editor 14 , image storage device 18 , and viewing device 26 can be connected by internal connections to form a consolidated system for managing images without the need for networks 22 and 24 .
- the controller 16 includes at least one processing unit 36 (e.g., a microprocessor, a microcontroller, or another suitable programmable device), one or more non-transitory memory modules 38 , one or more input units 40 , and one or more output units 42 .
- the controller 16 includes a combined input/output module in addition to or in place of the separate modules 40 and 42 .
- alternative configurations of the controller 16 are possible that include more, less, or different components.
- the memory module 38 can include one or more types of memory, such as read-only memory (“ROM”), random access memory (“RAM”), flash memory, a hard disk, a removable drive, or other suitable magnetic, optical, physical, or electronic memory devices.
- ROM read-only memory
- RAM random access memory
- flash memory a hard disk
- a removable drive or other suitable magnetic, optical, physical, or electronic memory devices.
- the controller 16 is configured to retrieve instructions from memory 38 and execute the instructions to manage images.
- the instructions can include firmware, one or more applications, program data, filters, rules, one or more program modules, and other executable instructions.
- the editor 14 is similarly implemented as a software-based device.
- the controller 16 communicates with a user interface 28 .
- the user interface 28 can include a display and input devices such as a touch-screen, a keyboard, a mouse, a plurality of knobs, dials, switches, buttons, etc.
- a user can use the user interface 28 to configure the controller 16 and set parameters for how acquired images are managed and stored for a particular clinical trial.
- the components of the system 10 can be combined and distributed in various configurations.
- the controller 16 can be combined with the editor 14 .
- the controller 16 can be combined with other systems and devices commonly used in the medical industry, such as an electronic data capture system, a PACS, a RIS, a CIMS or a similar system used to store and manage patient information and subsequent access and processing.
- the controller 16 is combined with the image storage device 18 , which includes a PACS, RIS, and/or CIMS.
- FIG. 3 illustrates a workflow performed by the system 10 for acquiring and managing images.
- an acquisition device 12 acquires images and transmits an image object 44 to the editor 14 .
- the image object 44 includes image data (i.e., the digital images captured during a radiological exam by the acquisition device 12 ) and metadata, which provides information regarding the image data (e.g., patient name, exam date, clinical trial identifier, etc.).
- the metadata is contained in a header of the image data.
- the metadata is de-identified and standardized before it is transmitted to the editor 14 to comply with industry standards such as the Health Insurance Portability and Accountability Act (“HIPAA”).
- HIPAA Health Insurance Portability and Accountability Act
- the system 10 uses a gateway 55 to collect and coordinate the image object 44 to ensure that the image object 44 is compliant with industry standards and regulations (e.g., HIPAA) before the gateway 55 passes the object 44 to the editor 14 for additional processing.
- Gateways 55 are generally known in the art by various names such as an image gateway or image appliance, and are provided by a number of vendors including, for example, AG Mednet.
- a gateway can be implemented as an integrated hardware and software device or as a software-based device. For example, as illustrated in FIG.
- a software-based gateway 55 a (“a sending gateway”) can be implemented at the acquisition site (e.g., as part of the acquisition device 12 ) to de-identify the image object 44 and send the image object 44
- a hardware and software gateway 55 b (“a receiving gateway”) can be implemented at the editor 14 (or as an intermediary device between the sending gateway 55 a and the editor 14 ) to handle receipt of the image object 44
- a gateway 55 can provide data security, encrypt and de-crypt the image object 44 , and/or compress and de-compress the image object 44 .
- the editor 14 if the editor 14 is located at or near the acquisition device 12 or the gateway 55 , the editor 14 can be configured to perform the de-identification of the image object 44 .
- the editor 14 is a temporary repository of the image object 44 . Once the image object 44 is received by the editor 14 , the editor 14 communicates with the controller 16 . For example, the editor 14 transmits one or more signals 108 to the controller 16 that notify the controller 16 that the editor 14 has received the image object 44 .
- the signals 108 can include information regarding the received image object 44 .
- the signals 108 include a clinical trial or subject identifier and other information included in the object's metadata.
- the controller 16 determines the clinical trial associated with the image object 44 and determines a number of copies of the image object 44 that is needed.
- the number of copies can correspond to the minimum number of independent reviewers (e.g., two) used in the determined clinical trial. In other embodiments, the number of copies corresponds to a maximum number of independent reviewers used (e.g., assuming that a tie-breaker may be needed).
- the controller 16 can access information (stored locally or on an external server or device) that specifies parameters for clinical trials.
- a user inputs or sets the parameters for a particular clinical trial using the user interface 28 coupled to the controller 16 .
- the parameters can include a number of independent reviewers (e.g., minimum or maximum) for a particular clinical trial.
- the controller 16 stores the parameters (e.g., to one or more of the memory modules 38 ). Therefore, the controller 16 can use the clinical trial identifier included in the signals 108 to determine the clinical trial associated with the received images. The controller 16 can then access the parameters associated with the identified clinical trial to determine the number of copies of the image object 44 needed for the trial.
- the controller 16 transmits one or more signals (e.g., processing instructions) 110 to the editor 14 .
- the processing instructions 110 instruct the editor 14 to create a particular number of copies of the received image object 44 .
- the processing instructions 110 can include a number (“N”) representing the number of copies needed for the image object 44 .
- the processing instructions 110 can also include a unique identifier for each copy. In particular, to prevent the copies 118 from being exactly identical (which would causes access problems and errors if multiple image objects 44 were stored to the image storage device 18 with identical metadata), each copy 118 needs to be uniquely identifiable.
- the controller 16 can generate and provide the editor 14 (through the processing instructions 110 ) a unique identifier for each copy 118 .
- the editor 14 can modify the metadata for each copy based on one of the unique identifiers provided by the controller 16 .
- the unique identifier is a value for at least one field included in the image object's header, such as a patient identification field, a medical record number field, a study universal identification number (“SUID”) field, and/or an accession number field.
- the unique identifier can be the value of a single field or the combination of values of multiple fields.
- the unique identifier can be a combination of the value of a trial identification field (similar to a patient identification field in a hospital setting) and the value of the medical record number field, SUID field, or accession number field.
- the editor 14 receives the processing instructions 110 and creates N copies 118 of the image object 44 .
- the editor 14 also modifies the metadata associated with each copy 118 based on of the unique identifiers provided by the controller 16 .
- the metadata of each copy 118 includes at least one field 116 , such as the SUID field illustrated in FIGS. 3 and 4 , and the editor 14 sets the field 116 of each copy 118 to one of the unique identifiers provided by the controller 16 .
- each copy 118 includes most of the same data as included in the original image object 44 (e.g., the image data and metadata associated with administrative data, such as patient demographics, acquisition site information, etc.), each copy 118 is identifiable as a unique image object based on the information included in the field 116 .
- the editor 14 After creating the copies 118 and modifying the copies 118 based on the unique identifiers, the editor 14 transmits the copies 118 to the image storage device 18 for storage (e.g., as image objects 44 ). In some embodiments, the editor 14 discards the original image object 44 and does not transmit the original image object 44 to the image storage device 18 . In other embodiments, the editor transmits the original image object 44 to the image storage device 18 with the copies 118 or transmits the original image object 44 to a second storage location separate from the image storage device 18 . It should be understood that the functionality of the controller 16 and the editor 14 described above can be combined and distributed in various ways. For example, in some embodiments, the editor 14 generates the unique identifier for each copy 118 rather than the controller 16 .
- the controller 16 generates the copies 118 and supplies the copies 118 to the editor 14 , and the editor 14 assigns the unique identifiers and stores the copies 118 to the image storage device 18 . Furthermore, in some embodiments, the controller 16 is combined with the editor 14 and the functionality of each component as described above is provided by a single system or device.
- the image storage device 18 stores and treats each copy 118 as a unique image object 44 (i.e., a unique study or exam) that can be independently accessed, and measurements, observations, and other annotations made to one copy 118 do not affect the other copies 118 .
- the image storage device 18 can include standard, unmodified devices or products, such as a PACS, RIS, and/or CIMS, while still providing blind review for a clinical trial.
- the controller 16 can store information that associates the copies 118 with the original image object 44 (e.g., metadata from the original image object 44 and the unique identifiers assigned to the copies 118 ), such that the controller 16 can track the copies 118 made from the original image object 44 . Accordingly, the controller 16 can provide information to individuals or other computing devices or systems regarding what image objects stored to the image storage device 18 are copies of the same original image object. This information can be used by the controller 16 or other computing devices or systems to reconcile assessments (e.g., compare independent assessments of images and request tie-breakers as needed). This information can also be used to alert particular reviewers when images are available for review.
- assessments e.g., compare independent assessments of images and request tie-breakers as needed.
- the controller 16 can provide a reviewer with a unique identifier associated with a particular image object stored in the image storage device 18 (e.g., a value for the field 116 ), and the reviewer can access the image from the image storage device 18 using the provided identifier and the viewing device 26 .
- the controller 16 can be configured to provide the unique identifier automatically to a particular reviewer.
- the controller 16 can provide this information to individuals who manually inform the reviewers.
- the controller 16 can provide this information to other computing devices or systems that use the information to alert reviewers of available images.
- a reviewer can access the image object stored in the image storage device 18 using the viewing device 26 .
- the image storage device 18 can include standard image management systems and devices, such as a RIS, PACS, and/or CIMS, the viewing device 26 can execute any standard viewer application compatible with the image storage device 18 . Accordingly, the system 10 can be used to access images without requiring customized viewer applications.
- the reviewer can provide measurements and annotations of the image data (hereinafter referred to as an “image assessment”).
- the image assessment can be saved with the image object in the image storage device 18 .
- the image assessment is stored as part of the object's metadata.
- the assessment is stored in a separate file, database, or server.
- the assessment is linked to the associated object (e.g., based on the unique identifier included in the field 116 of the object). Therefore, the image assessment can be subsequently retrieved with the object.
- each copy 118 is associated with a different unique identifier, even if one reviewer completes his or her review of their copy 118 in tandem with another reviewer, each reviewer is assessing a different copy 118 . Furthermore, without having the unique identifiers of the other copies 118 , each reviewer cannot access the assessments generated by the other reviewers of the other copies 118 . Therefore, the reviewers remain blind to the assessments performed by other reviewers.
- the controller 16 retains the information necessary to link the copies 118 created for a particular original image object 44 . The controller 16 can use this information to reconcile the independent assessments (e.g., compare the assessments to determine if a tie-breaker assessment is necessary) and manage review of each copy 118 .
- controller 16 can store the information necessary to link the copies 118 in the memory 38 or in a separate memory accessible by the controller 16 (e.g., over a direct connection or a network). Furthermore, in some embodiments, a component different from the controller 16 accesses the information linking the copies 118 and uses the information to reconcile the independent assessments or otherwise manage review of each copy 118 .
- the system 10 also provides quality control to check for and correct various errors that can occur during a clinical trial. For example, in some cases an image object is received that uses various names for the same pathology or anatomy or an acquisition site sends too many series. In these cases, a quality control technologist would edit the exam or image object so that it complies with the clinical trial parameters. These changes need to be included in all of the copies created for the image object. If the quality control function takes place before the image object 44 reaches the editor 14 , the editor 14 copies the image object 44 that already includes the quality control changes. Alternatively, if the quality control function takes place after the editor 14 copies the object, the editor 14 (based on information supplied from the controller 16 ) can update each of the previously-generated copes to include the quality control changes.
- the components of the system 10 can be arranged in various configurations.
- the editor 14 and the controller 16 can be included in the same location or alternatively, the controller 16 can be at a remote location with respect to the editor 14 .
- the editor 14 and the image storage device 18 can be included in the same location or alternatively, the image storage device 18 can be at a remote location with respect to the editor 14 .
- the system 10 may include a database or server other than the image storage device 18 to store image assessments.
- one or more of the above-described components can be hosted, such as in a “cloud” environment.
- the controller 16 is hosted but is configured to receive and provide information regarding acquired images and corresponding copies as described above. However, it should be understood that any combination of the components described herein may be hosted.
- systems and methods described herein are used in the context of managing medical images associated with a clinical trial, these systems and methods may be used for other applications.
- the systems and methods described herein can be used in any application that requires independent blind or tandem review of images, such as for teaching or student evaluation purposes or for providing second opinions.
- the invention provides, among other things, a system and method for creating and managing data objects that are independently retrievable for independent assessment.
- Various features and advantages of the invention are set forth in the following claims.
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Abstract
Description
- This application is a divisional application of U.S. patent application Ser. No. 13/650,370 filed Oct. 12, 2012, which claims priority to U.S. Provisional Patent Application 61/546,373, filed Oct. 12, 2011. The entire content of both applications is hereby incorporated by reference.
- The present invention relates to digital image processing systems and methods. In particular, the invention relates to digital image processing systems and methods for managing medical images.
- Medical images can be acquired for various reasons and uses. Medical images can be acquired for diagnostic and treatment purposes within a hospital setting. In particular, a physician may request that a patient undergo a radiological examination so that the physician can diagnose the patient or track the progress or treatment of a previously-diagnosed issue. In this context, after the images are initially acquired, the images are reviewed by the physician or other healthcare professionals (e.g., a radiologist). The reviewer uses an image viewer to assess the images and make measurements and annotations associated with the images. The reviewer also provides a report summarizing his or her findings, which often includes a dictated narrative. The measurements, annotations, and report are stored and associated with the acquired images. Therefore, if the acquired images are later accessed (e.g., as part of a “second” review or as a standard part of reviewing a patient's health record), the original reviewer's measurements, annotations, and report are available. Making this information available to subsequent reviewers aids informed treatment of a patient based on all available information.
- Medical images can also be acquired as part of a clinical trial. For example, during a clinical trial for a new cancer drug, trial participants may undergo one or more radiological examinations to determine how a cancerous tumor reacts to the new drug. Images acquired during a clinical trial are typically handled differently than images acquired in a hospital setting. First, as compared to the non-standard, narrative report generated by a reviewer in a hospital setting, a reviewer in a clinical trial provides an objective quantitative analysis that relies on evidence-based measurements, such as biomarkers. To ensure the accuracy of these objective observations and measurements, images acquired as part of a clinical trial are often blindly reviewed (e.g., in tandem) by at least two reviewers. The results from the reviewers are compared to determine whether the results match. If the results match, the independent assessments are saved for subsequent use and/or review. If the results do not match, one or more additional reviewers may be used to evaluate the images as a tie-breaker. In the end, all of the independent assessments are saved for subsequent use and/or review.
- Because images in a clinical trial need to be reviewed blindly by multiple reviewers, systems and methods used to analyze images in a hospital setting are often unusable for clinical trials or require extensive (and costly) modification. Accordingly, many clinical trials rely on manual processes to manage images, which are slow, inefficient, and prone to human errors. Accordingly, embodiments of the invention provide systems and methods for managing image assessment within a clinical trial setting.
- In one embodiment, the invention provides a method for managing at least one medical image. The method includes receiving information regarding the at least one medical image, and determining, at a first processor, a number of copies needed of the at least one medical image based on the information regarding the at least one medical image. The method also includes generating, at the first processor, a unique identifier for each copy and providing, to a second processor, the number of copies needed and the unique identifiers. The second processor generates the number of copies of the at least one medical image, modifies each of the copies based on one of the unique identifiers, and stores the copies to at least one image storage device.
- In another embodiment, the invention provides a method for managing at least one medical image, wherein the at least one medical image includes image data and metadata. The method includes generating, at a processor, a number of copies of the at least one medical image, wherein the number of copies is equal to a number of independent reviewers associated with the at least one medical image and each of the copies includes the image data and the metadata. The method also includes modifying the metadata of each of the copies to include a unique identifier, and storing the copies to at least one image storage device.
- In yet another embodiment, the invention provides a system for managing at least one medical image. The system includes a first processor configured to receive information regarding the at least one medical image, wherein the at least one medical image includes image data and metadata, and to determine a number of copies needed of the at least one medical image based on the information regarding the at least one medical image. The first processor is also configured to generate a number of unique identifiers, the number of unique identifiers equal to the number of copies needed, and to provide, to a second processor, the number of copies needed and the unique identifiers. The second processor generates the number of copies of the at least one medical image, modifies each of the copies to include one of the unique identifiers, and stores the copies to at least one image storage device.
- Other aspects of the invention will become apparent by consideration of the detailed description and accompanying drawings.
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FIG. 1 illustrates a digital image processing system according to one embodiment of the invention. -
FIG. 2 illustrates a controller included in the digital image processing system ofFIG. 1 . -
FIGS. 3 and 4 are flow charts illustrating methods performed by the digital image processing system ofFIG. 1 . - Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the accompanying drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. It should also be noted that a plurality of hardware and software based devices, as well as a plurality of different structural components may be utilized to implement the invention. Furthermore, and as described in subsequent paragraphs, the specific configurations illustrated in the drawings are intended to exemplify embodiments of the invention and that other alternative configurations are possible.
- As described above in the summary section, medical images are used and assessed differently in hospital settings than in clinical trial settings. Within the hospital setting, numerous systems and methods have been developed that match the way images are used and processed. For example, hospitals and other image acquisition sites and networks typically use (1) a Radiology Information System (“RIS”) that stores and manages billing, image reports, scheduling, etc. associated with radiological examinations and (2) a Picture Archiving and Communication System (“PACS”) that stores and manages the images associated with the radiological examinations. The RIS runs in parallel with the PACS in a streamlined, linear process that automates the standard process of assessing images in a hospital setting. As noted above, the PACS allows individuals to access stored images and any associated annotations, measurements, or reports for a particular radiological examination or a particular patient. Accordingly, as previously noted, although clinical trials also assess medical images, clinical trials often cannot use the standard products and systems used in a hospital setting.
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FIG. 1 illustrates a digitalimage processing system 10. Thesystem 10 can be used to manage images acquired for a clinical trial. Thesystem 10 includes one ormore acquisition devices 12, an editor 14 (e.g., a digital imaging and communications in medicine (“DICOM”) editor), acontroller 16, and animage storage device 18. As described in more detail below, theacquisition devices 12 acquire digital images of a patient and transmit the images to theeditor 14. Theeditor 14 communicates with thecontroller 16 to manage the processing of acquired images, which includes storing the images in theimage storage device 18. After the images are stored, a reviewer (e.g., an individual reviewing the acquired images for the clinical trial) can use a computing device executing a viewer application (hereinafter referred to as a “viewing device 26”) to access stored images. Viewer applications are well-known in the medical image industry and are provided by numerous vendors. The available viewer applications provide different functionality and different compatibility with particularimage storage devices 18. In some embodiments, theimage storage device 18 includes a PACS, a RIS, and/or a clinical image management system (“CIMS”), which are well-known in the medical industry. Although illustrated as a single device, theimage storage device 18 can include multiple devices (e.g., multiple servers or databases). - As illustrated in
FIG. 1 , a plurality ofnetworks acquisition devices 12, theeditor 14, thecontroller 16, theimage storage device 18, and theviewing device 26. Thenetworks networks controller 16,editor 14,image storage device 18, andviewing device 26 can be connected by internal connections to form a consolidated system for managing images without the need fornetworks - As illustrated in
FIG. 2 , thecontroller 16 includes at least one processing unit 36 (e.g., a microprocessor, a microcontroller, or another suitable programmable device), one or morenon-transitory memory modules 38, one ormore input units 40, and one ormore output units 42. In some embodiments, thecontroller 16 includes a combined input/output module in addition to or in place of theseparate modules controller 16 are possible that include more, less, or different components. - The
memory module 38 can include one or more types of memory, such as read-only memory (“ROM”), random access memory (“RAM”), flash memory, a hard disk, a removable drive, or other suitable magnetic, optical, physical, or electronic memory devices. As described in more detail below, thecontroller 16 is configured to retrieve instructions frommemory 38 and execute the instructions to manage images. The instructions can include firmware, one or more applications, program data, filters, rules, one or more program modules, and other executable instructions. In some embodiments, theeditor 14 is similarly implemented as a software-based device. - As illustrated in
FIG. 2 , thecontroller 16 communicates with auser interface 28. Theuser interface 28 can include a display and input devices such as a touch-screen, a keyboard, a mouse, a plurality of knobs, dials, switches, buttons, etc. As described in more detail below, a user can use theuser interface 28 to configure thecontroller 16 and set parameters for how acquired images are managed and stored for a particular clinical trial. - It should be understood that the components of the
system 10 can be combined and distributed in various configurations. For example, in some embodiments, thecontroller 16 can be combined with theeditor 14. Furthermore, thecontroller 16 can be combined with other systems and devices commonly used in the medical industry, such as an electronic data capture system, a PACS, a RIS, a CIMS or a similar system used to store and manage patient information and subsequent access and processing. For example, in some embodiments, thecontroller 16 is combined with theimage storage device 18, which includes a PACS, RIS, and/or CIMS. -
FIG. 3 illustrates a workflow performed by thesystem 10 for acquiring and managing images. As illustrated inFIG. 3 , anacquisition device 12 acquires images and transmits animage object 44 to theeditor 14. Theimage object 44 includes image data (i.e., the digital images captured during a radiological exam by the acquisition device 12) and metadata, which provides information regarding the image data (e.g., patient name, exam date, clinical trial identifier, etc.). In some embodiments, the metadata is contained in a header of the image data. - In some embodiments, the metadata is de-identified and standardized before it is transmitted to the
editor 14 to comply with industry standards such as the Health Insurance Portability and Accountability Act (“HIPAA”). For example, if theeditor 14 is located at a different location than theacquisition device 12, which requires that theimage object 44 be transmitted over one or more public or non-secure networks, theacquisition device 12 can de-identify the metadata before transmitting theimage object 44 to the editor 14 (e.g., using software installed at the acquisition device 12). In other embodiments, as illustrated inFIG. 4 , thesystem 10 uses a gateway 55 to collect and coordinate theimage object 44 to ensure that theimage object 44 is compliant with industry standards and regulations (e.g., HIPAA) before the gateway 55 passes theobject 44 to theeditor 14 for additional processing. Gateways 55 are generally known in the art by various names such as an image gateway or image appliance, and are provided by a number of vendors including, for example, AG Mednet. A gateway can be implemented as an integrated hardware and software device or as a software-based device. For example, as illustrated inFIG. 4 , a software-basedgateway 55 a (“a sending gateway”) can be implemented at the acquisition site (e.g., as part of the acquisition device 12) to de-identify theimage object 44 and send theimage object 44, and a hardware andsoftware gateway 55 b (“a receiving gateway”) can be implemented at the editor 14 (or as an intermediary device between the sendinggateway 55 a and the editor 14) to handle receipt of theimage object 44. In addition to de-identifying theimage object 44, a gateway 55 can provide data security, encrypt and de-crypt theimage object 44, and/or compress and de-compress theimage object 44. In some embodiments, if theeditor 14 is located at or near theacquisition device 12 or the gateway 55, theeditor 14 can be configured to perform the de-identification of theimage object 44. - The
editor 14 is a temporary repository of theimage object 44. Once theimage object 44 is received by theeditor 14, theeditor 14 communicates with thecontroller 16. For example, theeditor 14 transmits one ormore signals 108 to thecontroller 16 that notify thecontroller 16 that theeditor 14 has received theimage object 44. Thesignals 108 can include information regarding the receivedimage object 44. For example, in some embodiments, thesignals 108 include a clinical trial or subject identifier and other information included in the object's metadata. - Based on the
signals 108, thecontroller 16 determines the clinical trial associated with theimage object 44 and determines a number of copies of theimage object 44 that is needed. The number of copies can correspond to the minimum number of independent reviewers (e.g., two) used in the determined clinical trial. In other embodiments, the number of copies corresponds to a maximum number of independent reviewers used (e.g., assuming that a tie-breaker may be needed). - To determine the number of copies needed, the
controller 16 can access information (stored locally or on an external server or device) that specifies parameters for clinical trials. In some embodiments, a user inputs or sets the parameters for a particular clinical trial using theuser interface 28 coupled to thecontroller 16. The parameters can include a number of independent reviewers (e.g., minimum or maximum) for a particular clinical trial. Upon receiving the parameters from the user through theuser interface 28, thecontroller 16 stores the parameters (e.g., to one or more of the memory modules 38). Therefore, thecontroller 16 can use the clinical trial identifier included in thesignals 108 to determine the clinical trial associated with the received images. Thecontroller 16 can then access the parameters associated with the identified clinical trial to determine the number of copies of theimage object 44 needed for the trial. - After determining the number of copies needed for the received
image object 44, thecontroller 16 transmits one or more signals (e.g., processing instructions) 110 to theeditor 14. The processinginstructions 110 instruct theeditor 14 to create a particular number of copies of the receivedimage object 44. For example, the processinginstructions 110 can include a number (“N”) representing the number of copies needed for theimage object 44. The processinginstructions 110 can also include a unique identifier for each copy. In particular, to prevent thecopies 118 from being exactly identical (which would causes access problems and errors if multiple image objects 44 were stored to theimage storage device 18 with identical metadata), eachcopy 118 needs to be uniquely identifiable. For example, the metadata associated with eachcopy 118 needs to include at least one piece of information that is different from the metadata of theother copies 118. Therefore, thecontroller 16 can generate and provide the editor 14 (through the processing instructions 110) a unique identifier for eachcopy 118. As described below, theeditor 14 can modify the metadata for each copy based on one of the unique identifiers provided by thecontroller 16. In some embodiments, the unique identifier is a value for at least one field included in the image object's header, such as a patient identification field, a medical record number field, a study universal identification number (“SUID”) field, and/or an accession number field. It should be understood that the unique identifier can be the value of a single field or the combination of values of multiple fields. For example, the unique identifier can be a combination of the value of a trial identification field (similar to a patient identification field in a hospital setting) and the value of the medical record number field, SUID field, or accession number field. - Therefore, the
editor 14 receives theprocessing instructions 110 and creates N copies 118 of theimage object 44. Theeditor 14 also modifies the metadata associated with eachcopy 118 based on of the unique identifiers provided by thecontroller 16. For example, the metadata of eachcopy 118 includes at least onefield 116, such as the SUID field illustrated inFIGS. 3 and 4 , and theeditor 14 sets thefield 116 of eachcopy 118 to one of the unique identifiers provided by thecontroller 16. Accordingly, although eachcopy 118 includes most of the same data as included in the original image object 44 (e.g., the image data and metadata associated with administrative data, such as patient demographics, acquisition site information, etc.), eachcopy 118 is identifiable as a unique image object based on the information included in thefield 116. - After creating the
copies 118 and modifying thecopies 118 based on the unique identifiers, theeditor 14 transmits thecopies 118 to theimage storage device 18 for storage (e.g., as image objects 44). In some embodiments, theeditor 14 discards theoriginal image object 44 and does not transmit theoriginal image object 44 to theimage storage device 18. In other embodiments, the editor transmits theoriginal image object 44 to theimage storage device 18 with thecopies 118 or transmits theoriginal image object 44 to a second storage location separate from theimage storage device 18. It should be understood that the functionality of thecontroller 16 and theeditor 14 described above can be combined and distributed in various ways. For example, in some embodiments, theeditor 14 generates the unique identifier for eachcopy 118 rather than thecontroller 16. In other embodiments, thecontroller 16 generates thecopies 118 and supplies thecopies 118 to theeditor 14, and theeditor 14 assigns the unique identifiers and stores thecopies 118 to theimage storage device 18. Furthermore, in some embodiments, thecontroller 16 is combined with theeditor 14 and the functionality of each component as described above is provided by a single system or device. - Because the
copies 118 have unique identifiers (e.g., field 116), theimage storage device 18 stores and treats eachcopy 118 as a unique image object 44 (i.e., a unique study or exam) that can be independently accessed, and measurements, observations, and other annotations made to onecopy 118 do not affect theother copies 118. Accordingly, theimage storage device 18 can include standard, unmodified devices or products, such as a PACS, RIS, and/or CIMS, while still providing blind review for a clinical trial. - Although the
image storage device 18 treats thecopies 118 independently, thecontroller 16 can store information that associates thecopies 118 with the original image object 44 (e.g., metadata from theoriginal image object 44 and the unique identifiers assigned to the copies 118), such that thecontroller 16 can track thecopies 118 made from theoriginal image object 44. Accordingly, thecontroller 16 can provide information to individuals or other computing devices or systems regarding what image objects stored to theimage storage device 18 are copies of the same original image object. This information can be used by thecontroller 16 or other computing devices or systems to reconcile assessments (e.g., compare independent assessments of images and request tie-breakers as needed). This information can also be used to alert particular reviewers when images are available for review. In particular, thecontroller 16 can provide a reviewer with a unique identifier associated with a particular image object stored in the image storage device 18 (e.g., a value for the field 116), and the reviewer can access the image from theimage storage device 18 using the provided identifier and theviewing device 26. In some embodiments, thecontroller 16 can be configured to provide the unique identifier automatically to a particular reviewer. In other embodiments, thecontroller 16 can provide this information to individuals who manually inform the reviewers. In still other embodiments, thecontroller 16 can provide this information to other computing devices or systems that use the information to alert reviewers of available images. - Upon receiving a unique identifier for a stored image object, a reviewer can access the image object stored in the
image storage device 18 using theviewing device 26. As noted above, because theimage storage device 18 can include standard image management systems and devices, such as a RIS, PACS, and/or CIMS, theviewing device 26 can execute any standard viewer application compatible with theimage storage device 18. Accordingly, thesystem 10 can be used to access images without requiring customized viewer applications. - Upon accessing an image object, the reviewer can provide measurements and annotations of the image data (hereinafter referred to as an “image assessment”). The image assessment can be saved with the image object in the
image storage device 18. For example, in some embodiments, the image assessment is stored as part of the object's metadata. In other embodiments, the assessment is stored in a separate file, database, or server. However, even when the image assessment is stored separately from theimage storage device 18, the assessment is linked to the associated object (e.g., based on the unique identifier included in thefield 116 of the object). Therefore, the image assessment can be subsequently retrieved with the object. - Because each
copy 118 is associated with a different unique identifier, even if one reviewer completes his or her review of theircopy 118 in tandem with another reviewer, each reviewer is assessing adifferent copy 118. Furthermore, without having the unique identifiers of theother copies 118, each reviewer cannot access the assessments generated by the other reviewers of theother copies 118. Therefore, the reviewers remain blind to the assessments performed by other reviewers. Thecontroller 16, however, retains the information necessary to link thecopies 118 created for a particularoriginal image object 44. Thecontroller 16 can use this information to reconcile the independent assessments (e.g., compare the assessments to determine if a tie-breaker assessment is necessary) and manage review of eachcopy 118. It should be understood that thecontroller 16 can store the information necessary to link thecopies 118 in thememory 38 or in a separate memory accessible by the controller 16 (e.g., over a direct connection or a network). Furthermore, in some embodiments, a component different from thecontroller 16 accesses the information linking thecopies 118 and uses the information to reconcile the independent assessments or otherwise manage review of eachcopy 118. - In some embodiments, the
system 10 also provides quality control to check for and correct various errors that can occur during a clinical trial. For example, in some cases an image object is received that uses various names for the same pathology or anatomy or an acquisition site sends too many series. In these cases, a quality control technologist would edit the exam or image object so that it complies with the clinical trial parameters. These changes need to be included in all of the copies created for the image object. If the quality control function takes place before theimage object 44 reaches theeditor 14, theeditor 14 copies theimage object 44 that already includes the quality control changes. Alternatively, if the quality control function takes place after theeditor 14 copies the object, the editor 14 (based on information supplied from the controller 16) can update each of the previously-generated copes to include the quality control changes. - It should be understood that the components of the
system 10 can be arranged in various configurations. For example, theeditor 14 and thecontroller 16 can be included in the same location or alternatively, thecontroller 16 can be at a remote location with respect to theeditor 14. Additionally, theeditor 14 and theimage storage device 18 can be included in the same location or alternatively, theimage storage device 18 can be at a remote location with respect to theeditor 14. Furthermore, as noted above, thesystem 10 may include a database or server other than theimage storage device 18 to store image assessments. In addition, one or more of the above-described components can be hosted, such as in a “cloud” environment. For example, in some embodiments, thecontroller 16 is hosted but is configured to receive and provide information regarding acquired images and corresponding copies as described above. However, it should be understood that any combination of the components described herein may be hosted. - It should also be understood that, although systems and methods described herein are used in the context of managing medical images associated with a clinical trial, these systems and methods may be used for other applications. For example, the systems and methods described herein can be used in any application that requires independent blind or tandem review of images, such as for teaching or student evaluation purposes or for providing second opinions.
- Thus, the invention provides, among other things, a system and method for creating and managing data objects that are independently retrievable for independent assessment. Various features and advantages of the invention are set forth in the following claims.
Claims (9)
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US10140420B2 (en) | 2018-11-27 |
US20130094728A1 (en) | 2013-04-18 |
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