3D tomographic reconstruction from portal imaging for patient positioning

被引：0

作者：

Mitschke, M ^{[1
]}

Bani-Hashemi, A ^{[1
]}

Ghelmansarai, F ^{[1
]}

Khamene, A ^{[1
]}

Pouliot, J ^{[1
]}

机构：

[1] Siemens Med Solut, D-91052 Erlangen, Germany

来源：

CARS 2003: COMPUTER ASSISTED RADIOLOGY AND SURGERY, PROCEEDINGS | 2003年 / 1256卷

关键词：

tomographic reconstruction; portal imaging;

D O I：

10.1016/S0531-5131(03)00513-2

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

External beam radiation therapy is an effective method of treating cancer in which the lesion is irradiated with high-energy X-ray beams. The first step in accurate delivery of radiation is accurate positioning of patient on the treatment table. Typically, reference images from the planning systems are matched with portal images acquired during patient setup prior to treatment. Matching of anatomical landmarks between the reference images and the portal images is attempted for patient positioning. This method has a number of shortcomings that influence the accuracy of patient positioning. We are proposing the use of Mega-Voltage Cone Beam CT (MVCT) acquired at the treatment time for patient positioning. The MVCT may be compared and matched with the planning CT for accurate determination of patient offset. We have demonstrated that acquisition of MVCT may be done with delivering a few Monitor Units (MU). (C) 2003 Published by Elsevier Science B.V.

引用

页码：107 / 111

页数：5