title: [A positioning error measurement method in radiotherapy based on 3D visualization].
abstract: The positioning error in radiotherapy is one of the most important factors that influence the location precision of the tumor. Based on the CT-on-rails technology, this paper describes the research on measuring the positioning error in radiotherapy by comparing the planning CT images with the treatment CT images using 3-dimension (3D) methods. It can help doctors to measure positioning errors more accurately than 2D methods. It also supports the powerful 3D interaction such as drag-dropping, rotating and picking-up the object, so that doctors can visualize and measure the positioning errors intuitively.
authors.affiliation: College of Biomedical Engineering and Instrument Science of Zhejiang University, Key Laboratory of Biomedical Engineering, Ministry of Education, Hangzhou 310027.
authors.forename: Ji-Ye
authors.initials: JY
authors.lastname: An
authors.forename: Yue-Xi
authors.initials: YX
authors.lastname: Li
authors.forename: Xu-Dong
authors.initials: XD
authors.lastname: Lu
authors.forename: Hui-Long
authors.initials: HL
authors.lastname: Duan
mesh_terms: D006801:Humans; D021621:Imaging, Three-Dimensional; D011878:Radiotherapy / Q000379:methods*