作者
Wolfgang Wein, Barbara Roper, Nassir Navab
发表日期
2007/5/29
期刊
IEEE transactions on medical imaging
卷号
26
期号
6
页码范围
866-879
出版商
IEEE
简介
This paper presents methods and a clinical procedure for integrating B -mode ultrasound images tagged with position information with a planning computed tomography (CT) scan for radiotherapy. A workflow is described that allows the integration of these modalities into the clinic. A surface mapping approach provides a preregistration of the ultrasound image borders onto the patient's skin. Successively, a set of individual ultrasound images from a freehand sweep is chosen by the physician. These images are automatically registered with the planning CT scan using novel intensity-based methods. We put a particular focus on deriving an appropriate similarity measure based on the physical properties and artifacts of ultrasound. A combination of a weighted mutual information term, edge correlation, clamping to the skin surface, and occlusion detection is able to assess the alignment of structures in ultrasound …
学术搜索中的文章
W Wein, B Roper, N Navab - IEEE transactions on medical imaging, 2007