A low-noise current-sensitive preamplifier for X-ray computed tomography with applying a charge-sensitive preamplifier

ABSTRACT

A low-noise current-sensitive preamplifier was developed for aiming low-dose X-ray computed tomography with applying a charge-sensitive preamplifier. We compared the number of X-ray photons needed for current measurement with the new preamplifier with that needed with a conventional preamplifier. Also, the dose rates for above conditions were measured by a commercial dose rate meter. Results show that the new preamplifier reduced the number of X-ray photons needed by two orders of magnitude compared with the conventional one.

KEYWORDS:

• X-ray
• current measurement
• low-noise preamplifier
• computed tomography
• dose rate
• experiment

Acknowledgments

The authors are grateful to Mr. K. Matsui of Nagasaki Circuit Design for his important suggestions in fabricating the VIEC.

Disclosure statement

No potential conflict of interest was reported by the authors.