公开(公告)号：EP1818871A1

公开(公告)日：2007-08-15

申请号：EP06002754.7

申请日：2006-02-10

申请人： GSF-Forschungszentrum für Umwelt und Gesundheit GmbH

发明人： Hoeschen, Christoph, Dr. ,  Tischenko, Oleg, Dr. ,  Schlattl, Helmut, Dr.

IPC分类号： G06T11/00 ,  G06T5/00

CPC分类号： G06T11/005

摘要： A method of correcting detector signals, in particular for scatter noise correction with an projection-based imaging device, comprises the steps of irradiating an object (1) with a radiation beam (2) including at least one discrete beam component (3, 3.1, 3.2) bounded by at least one masked angular range (4, 4.1, 4.2), so that the object (1) is partially irradiated with the beam component (3, 3.1, 3.2), detecting radiation transmitted through the object (1) with a detector device (30) comprising a plurality of detector portions (32, 32.1, 32.2, 33.1, 33.2), wherein direct radiation of the at least one beam component (3) is detected by at least one directly irradiated detector portion (32, 32.1, 32.2), detecting indirect radiation occurring in the at least one masked angular range by at least one masked detector portion (33.1, 33.2) adjacent to the at least one directly irradiated detector portion (32, 32.1, 32.2), and correcting detector signals of the at least one directly irradiated detector portion (32, 32.1, 32.2) in dependence on the at least one detector signal of the at least one masked detector portion (33.1, 33.2) for providing corrected detector signals. Furthermore, an imaging device for projection-based imaging is described.

摘要翻译： 一种校正检测器信号的方法，特别是用于基于投影的成像装置的散射噪声校正的方法包括以下步骤：用物体（1）照射包括至少一个离散束分量（3,3.1， 3.2），由至少一个掩蔽角度范围（4,4.1,4.2）限定，使得物体（1）被光束分量（3,3.1,3.2）部分地照射，检测通过物体（1）传播的辐射与 检测器装置（30），包括多个检测器部分（32,32.1,32.2,33.1,33.2），其中所述至少一个光束分量（3）的直接辐射由至少一个直接照射的检测器部分（32， 32.1,32.2），通过与所述至少一个直接照射的检测器部分（32,32.1,32.2）相邻的至少一个掩蔽检测器部分（33.1,33.2）检测在所述至少一个掩蔽角度范围内发生的间接辐射，以及校正检测器 至少一个直接照射的信号 检测器部分（32,32.1,32.2），其根据所述至少一个被掩蔽的检测器部分（33.1,33.2）的至少一个检测器信号，用于提供校正的检测器信号。 此外，描述了用于基于投影的成像的成像装置。