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1. CN106572832 - Data processing method, data processing apparatus, and X-ray CT apparatus

官庁 中華人民共和国
出願番号 112015000034343
出願日 10.07.2015
公開番号 106572832
公開日 19.04.2017
公報種別 A
IPC
A61B 6/03
A生活必需品
61医学または獣医学;衛生学
B診断;手術;個人識別
6放射線診断用機器,例.放射線治療と結合している装置
02異なる平面内を連続的に診断するための用具;立体放射線写真診断
03計算による断層撮影装置
G06T 1/00
G物理学
06計算;計数
Tイメージデータ処理または発生一般
1汎用イメージデータ処理
CPC
A61B 6/032
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
6Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
02Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
03Computerised tomographs
032Transmission computed tomography [CT]
A61B 6/5205
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
6Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
52Devices using data or image processing specially adapted for radiation diagnosis
5205involving processing of raw data to produce diagnostic data
G06T 11/006
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
112D [Two Dimensional] image generation
003Reconstruction from projections, e.g. tomography
006Inverse problem, transformation from projection-space into object-space, e.g. transform methods, back-projection, algebraic methods
G06T 2211/424
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
2211Image generation
40Computed tomography
424Iterative
A61B 6/0487
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
6Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
04Positioning of patients; Tiltable beds or the like
0487Motor-assisted positioning
A61B 6/5294
AHUMAN NECESSITIES
61MEDICAL OR VETERINARY SCIENCE; HYGIENE
BDIAGNOSIS; SURGERY; IDENTIFICATION
6Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
52Devices using data or image processing specially adapted for radiation diagnosis
5294involving using additional data, e.g. patient information, image labeling, acquisition parameters
出願人 HITACHI MEDICAL CORP.
発明者 GOTO TAIGA
TAKAHASHI HISASHI
HIROKAWA KOICHI
優先権情報 2014-155062 30.07.2014 JP
発明の名称
(EN) Data processing method, data processing apparatus, and X-ray CT apparatus
(ZH) 数据处理方法、数据处理装置以及X射线CT装置
要約
(EN)
Provided are a data processing method and others wherein since nearby pixels or beams may overlap each other in a back projection process or forward projection process for an image reconstruction, calculations taking into account such overlapping of pixels or beams are performed, thereby uniformly using data, whereby the occurrence of high frequency errors, such as moire and the like, can be suppressed. For this purpose, in a process of reconstructing an image from projection data, an image processing apparatus (122) performs a back projection process or forward projection process in which the pixel size is set to be wider than the pixel interval and in which a size-dependent weight (pixel window) that is in accordance with the amount of overlapping of nearby pixels is used to calculate an interpolation value to be applied to the pixels or beams, and the image processing apparatus (122) also performs a back projection process or forward projection process in which the beam size is set to be wider than the beam interval and in which a size-dependent weight (beam window) that is in accordance with the amount of overlapping of nearby beams is used to calculate an interpolation value to be applied to the pixels or beams.

(ZH)
本发明为了提供在对图像进行重构时的反投影处理或正投影处理中,设靠近的像素、射束重叠并进行考虑了像素、射束的重叠的运算,由此能够均匀地利用数据来抑制莫尔条纹等高频误差的产生的数据处理方法等,在根据投影数据对图像进行重构的处理中,图像处理装置(122)进行将像素尺寸设定得比像素间隔大,使用与靠近的像素的重叠量相应的尺寸依赖权重(像素窗口)来计算分配给像素或射束的内插值的反投影处理或正投影处理,并进行将射束尺寸设定得比射束间隔大,使用与靠近的射束的重叠量相应的尺寸依赖权重(射束窗口)来计算分配给像素或射束的内插值的反投影处理或正投影处理。