公开(公告)号：US20150302946A1

公开(公告)日：2015-10-22

申请号：US14646102

申请日：2013-11-18

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： Oren OFER ,  Oren ZARCHIN

IPC: G21K1/04 ,  G01N23/04

CPC classification number: G21K1/043 ,  A61B6/06 ,  A61B6/4035 ,  A61B6/405 ,  G01N23/04 ,  G21K1/10

Abstract: An imaging system (300) includes a radiation source (308) that emits radiation that traverses in a direction of an examination region (306) during a scan and a detector array (316) located opposite the radiation source, across the examination region, which detects radiation traversing the examination region during the scan and produces a signal indicative thereof. A beamshaper (318), located between the radiation source and the examination region, defines a flux intensity profile of the radiation beam traversing the examination region. The beamshaper includes a plurality of x-ray attenuating elements(326), which attenuate x-rays incident thereon, interleaved with a plurality of material free regions, which pass x-ray unattenuated. A transmittance of the x-rays is greater nearer a center region of the beamshaper relative to ends regions of the beamshaper. A beamshaper mover (328) translates the beam shaper during at least one acquisition interval of the scan.

Abstract translation: 成像系统（300）包括辐射源（308），辐射源（308）在扫描期间发射在检查区域（306）的方向上穿过的辐射，以及穿过检查区域位于与辐射源相对的检测器阵列（316） 在扫描期间检测穿过检查区域的辐射并产生指示其的信号。 位于辐射源和检查区域之间的波束形成器（318）限定穿过检查区域的辐射束的通量强度分布。 波束形成器包括多个X射线衰减元件（326），其衰减入射到其上的X射线，与多个无材料区域交错，X射线衰减元件通过X射线未衰减。 X射线的透射率相对于射束束的端部区域更靠近射束成形器的中心区域。 束扫描移动器（328）在扫描的至少一个采集间隔期间平移光束整形器。