Title:
【発明の名称】放射線画像化方法ならびに装置
Document Type and Number:
Japanese Patent JP2540033
Kind Code:
B2
Abstract:
A radiation imaging apparatus and method e.g. for computed tomography x-ray imaging employing a radiation detector which enhances the detector output due to lower energy components of the incident radiation. One embodiment includes first and second layers (190, 192) of crystalline scintillation material mutually aligned in a path of x-rays to be detected, to receive the x-rays in sequence. The layer (190) upstream in the x-ray path comprises a scintillation material having a relatively high efficiency for converting x-ray energy to light. The downstream layer (192) comprises a scintillation material having a relatively lower efficiency for x-ray/light conversion. A photodiode (198) is positioned to view both scintillation layers (190, 192) simultaneously and to respond to scintillations in either or both. Scintillation crystal material surfaces can be coated with reflective material (194) to enhance the effects of their scintillations. The photodiode (198) thus combines x-ray indicating scintillations from both crystals while in analog form. Another embodiment comprises a photodiode and an optically coupled scintillation crystal, with the photodiode upstream in the x-ray beam path relative to the crystal.
Inventors:
KAARU JEI BURUUNETSUTO
RODONII EI MATSUTOSON
RODONII EI MATSUTOSON
Application Number:
JP20262486A
Publication Date:
October 02, 1996
Filing Date:
August 28, 1986
Export Citation:
Assignee:
PICKER INT INC
International Classes:
G01N23/04; G01T1/20; G01T1/202; A61B6/03; (IPC1-7): A61B6/03; A61B6/03
Domestic Patent References:
| JP5317291A | ||||
| JP5799947A | ||||
| JP58118977A | ||||
| JP5664672A | ||||
| JP55143580U |
Attorney, Agent or Firm:
Nobuyuki Iida