X-ray sensitive video camera

Randy P. Luhta; John A. Rowlands

doi:10.1117/12.154617

14 September 1993 X-ray-sensitive video camera

Randy P. Luhta, John A. Rowlands

Proceedings Volume 1896, Medical Imaging 1993: Physics of Medical Imaging; (1993) https://doi.org/10.1117/12.154617
Event: Medical Imaging 1993, 1993, Newport Beach, CA, United States

Abstract

By converting the absorbed X-ray image directly to an electrical video signal, the x-ray sensitive video camera offers improved resolution and reduced veiling glare over a conventional x-ray image intensifier for medical fluoroscopy. Unfortunately, currently available x-ray sensitive video cameras are limited to a 1' field of view and poor quantum efficiency. We are developing an x-ray sensitive vidicon for medical use which will have a large field of view (5' or more) and a thicker amorphous selenium target with a quantum efficiency >70%. Due to the larger potential required to bias the thicker a-Se target a problem in maintaining a stable surface potential by means of a scanning electron beam is encountered. This stability problem is overcome by the addition of a suppressor mesh.

Citation Download Citation

Randy P. Luhta and John A. Rowlands "X-ray-sensitive video camera", Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); https://doi.org/10.1117/12.154617

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