Determining locations of intracerebral lesions for proton radiotherapy

Using an external view of the head, the ability to direct a proton radiotherapy beam at an intracerebral lesion is described, using a biostereometric (BSM) technique. The positions of markers, recognizable on computed tomography (CT) or magnetic resonance (MR) images, at known locations on the skin...

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Bibliographic Details
Published in:	Physics in medicine & biology 1993-10, Vol.38 (10), p.1393-1401
Main Authors:	Levin, C V, Hough, J, Adams, L P, Boonzaier, D, Ruther, H, Wynchank, S
Format:	Article
Language:	eng
Subjects:	Biological and medical sciences Biomarkers Brain Diseases - diagnosis Brain Diseases - radiotherapy Humans Medical sciences Protons Radiation therapy and radiosensitizing agent Radiotherapy, High-Energy Treatment with physical agents Treatment. General aspects Tumors
Online Access:	Get full text
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Summary:	Using an external view of the head, the ability to direct a proton radiotherapy beam at an intracerebral lesion is described, using a biostereometric (BSM) technique. The positions of markers, recognizable on computed tomography (CT) or magnetic resonance (MR) images, at known locations on the skin of a patient's head are related to the site of the lesion seen on the images. The markers' positions are determined by a BSM device, incorporating six video cameras coupled to a computer. A transformation from a coordinate system, defined by the CT or MR images, to another coordinate system, that of the BSM device, allows the proton beam to be directed towards the lesion. Markers used in this work were solid steel spheres for CT and plastic spheres containing oil for MR images.
ISSN:	0031-9155 1361-6560