-
公开(公告)号：EP1590045B1
公开(公告)日：2008-10-15
申请号：EP04703226.3
申请日：2004-01-19
发明人： BOTTERWECK, Henrik , SPIES, Lothar
CPC分类号： A61B6/032 , A61N5/1031 , Y10S128/922
摘要： 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.
-
2.发明公开DEVICE AND METHOD FOR ADAPTING THE RECORDING PARAMETERS OF A RADIOGRAPH 审中-公开DEVICE AND METHOD FOR调整X光片记录参数的
公开(公告)号：EP1603461A2
公开(公告)日：2005-12-14
申请号：EP04715413.3
申请日：2004-02-27
发明人： SPIES, Lothar , BOTTERWECK, Henrik , WEESE, Jürgen
IPC分类号： A61B6/03
摘要： 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.
-
3.发明公开PRACTICAL SPECT CALIBRATION METHOD FOR QUANTIFICATION OF NUCLIDES WITH HIGH-ENERGY CONTRIBUTIONS 审中-公开实用SPECT在定量具有高能量贡献校准核素
公开(公告)号：EP2347282A2
公开(公告)日：2011-07-27
申请号：EP09744752.8
申请日：2009-10-05
发明人： BOTTERWECK, Henrik
CPC分类号： G01T1/1648 , G01T7/005
摘要： 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.
-
公开(公告)号：EP1882198A1
公开(公告)日：2008-01-30
申请号：EP06728095.8
申请日：2006-05-01
IPC分类号： G01T1/164
CPC分类号： G01T1/1648 , A61B6/037 , A61B6/4258 , G01T1/1642
摘要： An imaging system (10) comprises at least one radiation detector unit (16) disposed adjacent a field of view (20) to detect and measure radiation from the field of view (20). The detector unit (16) includes multiple detection modules (18) which each detects radiation from a prespecified region of the field of view (20), each region being a fraction of the field of view. One or more pinholes (52) are associated with the detector unit (16). Each pinhole (52) receives radiation from the prespecified region of the field of view (20) and transmits radiation to one or more associated detection modules (18).
-
公开(公告)号：EP1590045A1
公开(公告)日：2005-11-02
申请号：EP04703226.3
申请日：2004-01-19
发明人： BOTTERWECK, Henrik , SPIES, Lothar
CPC分类号： A61B6/032 , A61N5/1031 , Y10S128/922
摘要： 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.
-
-
-
-
搜索结果
5 条记录 (耗时 0.013 秒)
