公开(公告)号：DE602004017129D1

公开(公告)日：2008-11-27

申请号：DE602004017129

申请日：2004-01-19

Applicant: PHILIPS INTELLECTUAL PROPERTY

Inventor： BOTTERWECK HENRIK ,  SPIES LOTHAR

IPC: A61N5/10 ,  A61B6/03

Abstract: In order to reduce an x-ray dose applied to a patient, it is necessary to know the dose absorbed by the patient. According to the present invention, there is provided a method of determining a local patient dose applied to a patient where after the reconstruction of the scan data into a diagnostic image, the scan data are backprojected into the patient volume, using the attenuation information of the diagnostic image to form a spatially varying photon fluence map. In parallel, the diagnostic image is segmented into anatomical structures to which dose-weighting factors are assigned. The locally absorbed dose is then calculated on the basis of the fluence map and the corresponding dose weights.

公开(公告)号：WO2010041192A3

公开(公告)日：2010-08-26

申请号：PCT/IB2009054352

申请日：2009-10-05

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS INTELLECTUAL PROPERTY ,  BOTTERWECK HENRIK

Inventor： BOTTERWECK HENRIK

IPC: G01T1/164 ,  G01T1/29 ,  G01T7/00

CPC classification number: G01T1/1648 ,  G01T7/005

Abstract: When calibrating a nuclear camera, such as a SPECT camera, point spread functions (PSF) are simulated for all possible photon energies and detection distances that the camera may experience. During manufacturer-side calibration, a point source (14) is imaged by the nuclear camera and a PSF therefor is measured. The measured PSF is compared to one or more simulated PSFs and a difference therebetween is determined. To calibrate the measured PSF, simulated PSF data is interpolated into the measured PSF to minimize the difference between the measured and simulated PSFs. The calibrated PSF is stored to memory and accessed during user-side calibration. A user then images a tracer sample during a routine camera calibration, and a PSF for the tracer sample is compared to the calibrated PSF to determine a level of contamination in the tracer sample. The tracer sample PSF is then calibrated for use in reconstructing nuclear images.

Abstract translation: 当校准诸如SPECT照相机的核相机时，对所有可能的光子能量和相机可能经历的检测距离来模拟点扩散函数（PSF）。 在制造商侧校准期间，通过核相机对点源（14）进行成像，并测量其中的PSF。 将测量的PSF与一个或多个模拟PSF进行比较，并确定它们之间的差异。 为了校准测量的PSF，将模拟的PSF数据插值到测量的PSF中以最小化测量的和模拟的PSF之间的差异。 校准的PSF存储到存储器中，并在用户侧校准期间进行访问。 然后用户在常规相机校准期间对示踪剂样品进行成像，并将示踪剂样品的PSF与校准的PSF进行比较，以确定示踪剂样品中的污染水平。 然后校准示踪剂样品PSF用于重建核图像。

公开(公告)号：WO2004080309A2

公开(公告)日：2004-09-23

申请号：PCT/IB2004000527

申请日：2004-02-27

Applicant: PHILIPS INTELLECTUAL PROPERTY ,  KONINKL PHILIPS ELECTRONICS NV ,  SPIES LOTHAR ,  BOTTERWECK HENRIK ,  WEESE JUERGEN

Inventor： SPIES LOTHAR ,  BOTTERWECK HENRIK ,  WEESE JUERGEN

IPC: A61B6/00 ,  A61B6/03

CPC classification number: A61B6/488 ,  A61B6/00 ,  A61B6/469 ,  A61B6/542 ,  A61B6/544

Abstract: The invention relates to a method of adapting imaging parameters for a computer tomographic radiograph of a body volume, comprising the following steps: obtaining a three-dimensional pilot radiograph with a low dose of radiation (1); determining a region of interest and a desired image quality in the pilot radiograph (2) with the aid of a patient model (4) or interactively (3); determining optimal imaging parameters (5); generating an X-ray image using the determined imaging parameters (6). Optionally, the X-ray image is combined (7) with the pilot radiograph.

Abstract translation: 本发明涉及一种使身体体积的计算机断层摄影X射线摄影的成像参数适应的方法，包括以下步骤：获得具有低剂量辐射的三维导管射线照片（1）; 借助于患者模型（4）或交互地（3），在导频X射线照片（2）中确定感兴趣的区域和期望的图像质量; 确定最佳成像参数（5）; 使用所确定的成像参数（6）生成X射线图像。 可选地，将X射线图像与导频X射线照片组合（7）。