The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 2021
Filed:
Feb. 19, 2018
Hitachi, Ltd., Tokyo, JP;
Masafumi Onouchi, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Provided is a radiographic imaging apparatus including a photon-counting detector that prevents variation in count rate performance by using self-heating of a photon-counting circuit, and improves accuracy in detecting photons. The photon-counting detector is provided with a semiconductor layer configured to generate electrical charge upon receipt of photons of radiation, a photon-counting circuit configured to read current values from pixel electrodes formed on one of the semiconductor surfaces, and a heat amount compensator configured to control an amount of heat of the photon-counting circuit according to a count rate of the photon-counting circuit. The heat amount compensator is activated when the count rate is low so that the amount of heat delivered from the photon-counting circuit when the count is low becomes nearly equal to the amount of heat delivered from the photon-counting circuit when the count rate is high.