The Status Of Quality Assurance For Computed Tomography Systems

J. L. McCrohan; C. K. Showalter; R. L. Burkhart; F. G. D. Shuman

doi:10.1117/12.936018

13 December 1983 The Status Of Quality Assurance For Computed Tomography Systems

J. L. McCrohan, C. K. Showalter, R. L. Burkhart, F. G. D. Shuman

Proceedings Volume 0419, Application of Optical Instrumentation in Medicine XI; (1983) https://doi.org/10.1117/12.936018
Event: Application of Optical Instrumentation in Medicine XI, 1983, Atlanta, United States

Abstract

The benefits of a comprehensive quality assurance (QA) program in conventional diagnostic radiology are well understood. In computed tomography (CT), however, the situation is less clear. Since the advent of CT a number of manufacturers and individual medical physicists have recommended a variety of parameters for periodic monitoring or system performance evaluation. These recommendations are reviewed. There are no data, however, indicating that CT facilities, with the exception of some mobile units, have implemented a comprehensive QA program, including the daily collection of data and its interpretation and application to the identification and correction of problems with the CT system. Data from a nationwide study will be presented which describe the present status of QA CT facilities. QA programs on mobile CT systems, where there is more concern about consistent system performance due to the effects of moving the unit, have suggested that trends in performance can be identified. Preliminary data indicates that a similar situation may hold in the case of fixed facilities. This suggests that CT QA programs may permit detection of problems before they significantly affect the diagnostic value of the CT image. The recent development of automated CT QA software by a number of investigators will also facilitate the implementation of appropriate QA protocols.

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J. L. McCrohan, C. K. Showalter, R. L. Burkhart, and F. G. D. Shuman "The Status Of Quality Assurance For Computed Tomography Systems", Proc. SPIE 0419, Application of Optical Instrumentation in Medicine XI, (13 December 1983); https://doi.org/10.1117/12.936018

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KEYWORDS

Manufacturing

Computed tomography

Spatial resolution

Diagnostics

Modulation transfer functions

Image quality

Signal attenuation

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