Title:
イメージング検出器およびイメージング検出方法
Document Type and Number:
Japanese Patent JP5771180
Kind Code:
B2
Abstract:
An imaging detector includes a scintillator array (202), a photosensor array (204) optically coupled to the scintillator array (202), a current-to-frequency (I/F) converter (314), and logic (312). The I/F converter (314) includes an integrator (302) and a comparator (310), and converts, during a current integration period, charge output by the photosensor array (204) into a digital signal having a frequency indicative of the charge. The logic (312) sets a gain of the integrator (302) for a next integration period based on the digital signal for the current integration period. In one instance, the gain is increased for the next integration period, relative to the gain for the current integration period, which allows for reducing an amount of bias current injected at an input of the I/F converter (314) to generate a measurable signal in the absence of radiation, which may reduce noise such as shot noise, flicker noise, and/or other noise.
More Like This:
Inventors:
Mark, Ray
Rufta, Randall Pee
Rufta, Randall Pee
Application Number:
JP2012501424A
Publication Date:
August 26, 2015
Filing Date:
February 18, 2010
Export Citation:
Assignee:
KONINKLIJKE PHILIPS N.V.
International Classes:
G01T1/20; A61B6/00; A61B6/03
Domestic Patent References:
| JP3016320A | ||||
| JP8168482A |
Foreign References:
| WO2000038316A1 |
Other References:
Randy Luhta et.al.,A new 2D-tiled detector for multislice CT,Proceedings of SPIE,米国,SPIE,2006年 2月28日,Vol.6142,pp.61420U-1 - 61420U-12
Attorney, Agent or Firm:
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Shinsuke Onuki
Tadashige Ito