Performance Evaluation And Quality Assurance Of Digital Fluoroscopy Imaging Systems

Theodore L. Houk; Seong K. Mun

doi:10.1117/12.936016

13 December 1983 Performance Evaluation And Quality Assurance Of Digital Fluoroscopy Imaging Systems

Theodore L. Houk, Seong K. Mun

Proceedings Volume 0419, Application of Optical Instrumentation in Medicine XI; (1983) https://doi.org/10.1117/12.936016
Event: Application of Optical Instrumentation in Medicine XI, 1983, Atlanta, United States

Abstract

We have developed a simple technique to evaluate and monitor the performance of digital fluoroscopy imaging systems in a clinical environment. We use a specially designed phantom based on a commercially available fluoroscopic stepwedge, placed on top of a water bath which is interlaced with rubber tubing simulating arteries. Noise characteristics are found by taking a difference image of the stationary phantom. Dynamic range and fidelity of logarithmic amplification in the presence of scattered radiation and veiling glare are measured by analyzing the image of the phantom and the difference image of the stepwedge in two different positions. Vascular contrast resolution is measured by taking the difference image of diluted contrast agent injected into the tubing. Further analysis of the obtained images can reveal possible instability in the video scanning pattern or the image intensifier electronic lens system and line-to-line sweep circuit clamping instability of a TV camera. We have used this technique on a routine basis for quality assurance of a digital system for some time.

Citation Download Citation

Theodore L. Houk and Seong K. Mun "Performance Evaluation And Quality Assurance Of Digital Fluoroscopy Imaging Systems", Proc. SPIE 0419, Application of Optical Instrumentation in Medicine XI, (13 December 1983); https://doi.org/10.1117/12.936016

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