Real-Time Local Adaptive Video Processing In Diagnostic Imaging

Richard G. Hier; Greg W. Schmidt

doi:10.1117/12.947270

11 June 1985 Real-Time Local Adaptive Video Processing In Diagnostic Imaging

Richard G. Hier, Greg W. Schmidt

Proceedings Volume 0535, Application of Optical Instrumentation in Medicine XIII; (1985) https://doi.org/10.1117/12.947270
Event: 1985 Medical Imaging Conferences, 1985, California, United States

Abstract

Diagnostic imaging has expanded rapidly in recent years as an effective tool in medicine. This growth has been supported by technological advances in sophisticated image acquisition and processing techniques. In particular, image processing may improve diagnostic performance by enhancing the information content or the ease of information extraction from a given image acquisition configuration, or may allow for lower required illuminating dosages and/or the use of smaller amounts of contrast media to obtain a given level of information. One class of enhancement operators transforms image data in a manner dependent on the statistical composition of local data neighborhoods. These operators generally have the effect of manipulating the effective image contrast in a local-area adaptive manner to enhance certain features while suppressing unwanted large scale shading. Such techniques have traditionally been performed off-line by computing or image processing hardware/software on single image frames, requiring many millions of arithmetic operations, with speeds heavily dependent on the size of local areas used and the degree of complexity of the algorithm applied. We describe here a system which enables complex image processing operations to be performed at video frame rates by a relatively inexpensive, very compact (e.g. 3 1/2 in. rack mount) piece of equipment which can be simply inserted in the video stream of an already existing image acquisition facility. This system utilizes a sampled data approach in a modular design which allows for such image enhancement techniques as the contrast enhancement schemes mentioned above, and also includes provision for storage (or temporal averaging) and subtraction of reference data masks. While this system can be applied to real-time adjustable enhancement of static images, it has particular application to fluoroscopy, angiography, endoscopy, etc., or in general to any modality which employs real-time (30 Hz) video display of image data.

Citation Download Citation

Richard G. Hier and Greg W. Schmidt "Real-Time Local Adaptive Video Processing In Diagnostic Imaging", Proc. SPIE 0535, Application of Optical Instrumentation in Medicine XIII, (11 June 1985); https://doi.org/10.1117/12.947270

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