JPS6086308U

JPS6086308U - CT device

Info

Publication number: JPS6086308U
Application number: JP17751483U
Authority: JP
Inventors: 右田　普一
Original assignee: 株式会社日立メデイコ
Priority date: 1983-11-18
Filing date: 1983-11-18
Publication date: 1985-06-14
Also published as: JPH0244730Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面は本考案のＣＴ装置の一実施例を示していて、第１
図は全体構成を示す説明図、第２図は中央で断面にした
状態を示す説明図、第３図はコリメータにおけるロッド
の分解斜視図である。１１・・・フレーム、１２・・・線源、１３・・・検出
器列、１４・・・Ｘ線束、１５・・・コリメータ、２１
〜２４・・・Ｘ線通路、３１〜３５・・・遮へい板、３
６・・・補償フィルタ板、３７〜３９・・・吸収板。The drawing shows one embodiment of the CT apparatus of the present invention.
FIG. 2 is an explanatory view showing the overall configuration, FIG. 2 is an explanatory view showing a cross section at the center, and FIG. 3 is an exploded perspective view of a rod in the collimator. DESCRIPTION OF SYMBOLS 11... Frame, 12... Radiation source, 13... Detector row, 14... X-ray flux, 15... Collimator, 21
~24...X-ray passageway, 31-35...shielding plate, 3
6... Compensation filter plate, 37-39... Absorption plate.

Claims

[Scope of utility model registration request]

A radiation source, a collimator that gives a predetermined irradiation field to the radiation from the radiation source, an emitter array arranged to detect the radiation as a number of branched beams, and a radiation source and a detector array between the radiation source and the detector array. Means for supporting the radiation source, collimator, and detector array so as to be able to rotate around a single point, and data necessary to construct a cross-sectional image of the object placed near the center using the output from each detector. The latter means has a known radiation absorption value and uses the output of the detector row by a phantom replaced with the subject as reference data to calculate the mutual sensitivity of the detectors. In a CT apparatus, the collimator includes a plurality of radiation passages forming the radiation field, and includes means for correcting non-uniformity of the radiation and non-linearity of the signals of each detection channel. It is attached to the support means so as to be able to be positioned selectively, and a part of the radiation passage is formed of a material having the same radiation absorption value as the phantom, or a material close to the absorption value of the phantom, or a material having an attenuation amount close to that of the phantom. Cη Mugisou is characterized by its presence.