The Concept Of Effective Exposure Time For Three Phase Diagnostic Radiologic Equipment

Richard T. Mooney; Jose Burgos; Walter A. Matis Jr. Jr.

doi:10.1117/12.965391

23 December 1976 The Concept Of Effective Exposure Time For Three Phase Diagnostic Radiologic Equipment

Richard T. Mooney, Jose Burgos, Walter A. Matis Jr. Jr.

Proceedings Volume 0096, Application of Optical Instrumentation in Medicine V; (1976) https://doi.org/10.1117/12.965391
Event: Application of Optical Instrumentation in Medicine V, 1976, Washington, D.C., United States

Abstract

Performance evaluations of three phase diagnostic radiologic equipment indicate the need for a reassessment of the concept of exposure time. Measurements of exposure time as defined by the equipment manufacturer (kV pulse width at 75% of peak value) demonstrates a lack of proportionality between exposure time and radiation intensity. In this paper, a method of determining an effective exposure time is presented. This effective time is defined as teff = tind + ▵t, where tind is the time indicated at the control and At is the correction required to achieve proportionality. Measurements show a wide variation in the value of At among different manufacturers and for different operating conditions, ranging from 0 to 6 ms.

Citation Download Citation

Richard T. Mooney, Jose Burgos, and Walter A. Matis Jr. Jr. "The Concept Of Effective Exposure Time For Three Phase Diagnostic Radiologic Equipment", Proc. SPIE 0096, Application of Optical Instrumentation in Medicine V, (23 December 1976); https://doi.org/10.1117/12.965391

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