Sensor gain and noise requirements for fluoroscopic applications

Tatsuya Yamazaki; Laurence Court; Toshio Kameshima

doi:10.1117/12.430872

28 June 2001 Sensor gain and noise requirements for fluoroscopic applications

Tatsuya Yamazaki, Laurence Court, Toshio Kameshima

Proceedings Volume 4320, Medical Imaging 2001: Physics of Medical Imaging; (2001) https://doi.org/10.1117/12.430872
Event: Medical Imaging 2001, 2001, San Diego, CA, United States

Abstract

The low x-ray exposures used in fluoroscopic applications (0.1 - 10mR at the sensor surface) mean that the requirements for sensor gain and noise are particularly strict. The achievable DQE is determined by a number of factors, including the sensor quantum efficiency, x-ray absorption Swank factor, secondary quanta conversion efficiency, internal gain (e.g. the number of electrons collected per visible photon produced in the phosphor), and additive noise. The influence of these factors is examined for three direct detection x-ray sensors (PbI2, a-Se and GaAs), and one indirect detector sensor (CsI). Although the characteristics of these sensors are very different, it is demonstrated that all are appropriate for use in fluoroscopic applications as a replacement for current image intensifier based systems.

Citation Download Citation

Tatsuya Yamazaki, Laurence Court, and Toshio Kameshima "Sensor gain and noise requirements for fluoroscopic applications", Proc. SPIE 4320, Medical Imaging 2001: Physics of Medical Imaging, (28 June 2001); https://doi.org/10.1117/12.430872

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