Videodensitometry - A Clinical Approach To The Calculation Of Left Ventricular Volume

D. A. Winter; B. G. Trenholm; D. Mymin; E. L. Lansdown; G. Reimer

doi:10.1117/12.953670

1 June 1972 Videodensitometry - A Clinical Approach To The Calculation Of Left Ventricular Volume

D. A. Winter, B. G. Trenholm, D. Mymin, E. L. Lansdown, G. Reimer

Proceedings Volume 0035, Application of Optical Instrumentation in Medicine I; (1972) https://doi.org/10.1117/12.953670
Event: Application of Optical Instrumentation in Medicine, 1972, Chicago, United States

Abstract

Considerable effort has been directed toward the calculation of left ventricular volume from angiographic images. The research techniques are now sufficiently advanced to permit an examination of the factors that will influence their clinical acceptance on a wide scale. Our clinical/biomedical engineering team considers the following factors to be important: 1. The clinical protocol must cause minimal physiological interference in the cardio-vascular system, especially during the data collection period. 2. About 3 or 4 cardiac cycles must be available for analysis to determine beat-by-beat variations, and yield a representitive time-course curve for 1 cardiac cycle. 3. A single plane technique is advantageous compared to biplane methods for the obvious economic and data handling reasons. However, any single plane technique should be insensitive to variations in the plane of viewing of the ventricular chamber. 4. Technique should be insensitive to non-homogeneities in the image plane. 5. A minimum of human involvement should be necessary in the data collection and processing, and there should not be a need for human pattern recognition on a frame-by-frame basis. 6. The analysis must be reasonably insensitive to changes in the gain and bias controls in imaging system (X-ray controls, image intensifier, TV, video tape recorder and interface A/D controls). 7. The data conversion and analysis techniques should be such that they can be handled by a medium size process control computer (CDC 1700, IBM 1800, PDP 9, HP 2100, etc.). 8. It is desireable, but not necessary, that the technique be capable of on-line conversion.

Citation Download Citation

D. A. Winter, B. G. Trenholm, D. Mymin, E. L. Lansdown, and G. Reimer "Videodensitometry - A Clinical Approach To The Calculation Of Left Ventricular Volume", Proc. SPIE 0035, Application of Optical Instrumentation in Medicine I, (1 June 1972); https://doi.org/10.1117/12.953670

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KEYWORDS

Data conversion

Control systems

Image intensifiers

Video

Calibration

Heart

Human-machine interfaces

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