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Biomedical subjects

F W Prior

Publications and source records attributed to F W Prior.

5 recordsLinked to original sources
PubMed1993

Specifying DICOM compliance for modality interfaces.

For picture archiving and communication systems (PACS) to be successful, they must be able to acquire image data from imaging devices and integrate this information into a PACS data base. Substantial effort has been invested in the Digital Imaging and Communications in Medicine (DICOM) standard to define a standard network interface and data model for imaging devices that can facilitate information systems integration. A communication standard cannot ensure multivendor interoperability. Necessary implementation-specific requirements are beyond the scope of a standard but not of a user-generated conformance statement. A DICOM user conformance profile (UCP) is a formal statement drafted by a potential purchaser of medical imaging equipment to state clearly the subset of DICOM functionality that shall be provided by a potential vendor. The UCP specifies the service classes, information objects, and communication protocols to be supported by the implementation. A modality interface UCP presented by the author permits scheduling and demographic information to be communicated to an imaging modality and allows images to be stored in a PACS. The UCP also ensures an unambiguous notification of the end of a study and proper communication of image data.

Computer Communication Networks↗
PubMed1989

Information management for data retrieval in a picture archive and communication system.

Data stored in a Picture archive and communication system (PACS) must be organized to permit efficient retrieval. The concept of a unique data object identifier (UID) permits a fundamental partitioning of the problem into a storage system, indexed by UID, and a database containing descriptive elements. The database serves to map user retrieval requests, expressed in terms of clinically relevant descriptive elements, and into UIDs of specific data objects. Different data organization mechanisms are employed by imaging modalities, thereby making the structure of a generic PACS database complex. One solution may be derived by analogy from film-based systems. Images and other data objects may be organized, by application of modality and site specific rules, into electronic folders. Folders may then be organized into a patient master folder or user-defined reference folders. Such an organization provides an easily understood user access model for information stored in PACS archives. This report presents a PACS architecture comprised of an Information Management System (IMS) and Information Storage System (ISS). Entity-relationship diagrams are presented to define a schema for the IMS database, based on the folder analogy. The folder concept and its relationship to the ACR-NEMA Standard are discussed.

Computer Systems↗
PubMed1977

Size and shape of the hominoid distal femur: fourier analysis.

A quantitative description of the shape of the distal femur is provided by Fourier analysis. Fourier analysis also facilitates the separation of the size and shape components which allows the removal of the distorting effect of size. Hence, comparisons between the hominoid groups can be based solely on shape. A sample of 91 hominoid distal femora from the Cleveland Museum of Natural History was used to make comparisons based on size and shape as well as shape only. It is suggested that unless the effect of size is minimized or removed, generally not possible with the traditional metrical approach, measures of biological distance will be distorted.

Animals↗
PubMedDate not supplied

Understanding and using DICOM, the data interchange standard for biomedical imaging.

The Digital Imaging and Communications in Medicine (DICOM) Standard specifies a non-proprietary data interchange protocol, digital image format, and file structure for biomedical images and image-related information. The fundamental concepts of the DICOM message protocol, services, and information objects are reviewed as background for a detailed discussion of the functionality of DICOM; the innovations and limitations of the Standard; and the impact of various DICOM features on information system users. DICOM addresses five general application areas: (1) network image management, (2) network image interpretation management, (3) network print management, (4) imaging procedure management, (5) off-line storage media management. DICOM is a complete specification of the elements required to achieve a practical level of automatic interoperability between biomedical imaging computer systems--from application layer to bit-stream encoding. The Standard is being extended and expanded in modular fashion to support new applications and incorporate new technology. An interface to other Information Systems provides for shared management of patient, procedure, and results information related to images. A Conformance Statement template enables a knowledgeable user to determine if interoperability between two implementations is possible. Knowledge of DICOM's benefits and realistic understanding of its limitations enable one to use the Standard effectively as the basis for a long term implementation strategy for image management and communications systems.

Computer Communication Networks↗