Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1993-10-08
1995-08-29
Evans, F. L.
Optics: measuring and testing
By polarized light examination
With light attenuation
2504621, 1286531, 378 69, 378205, 36441326, G01B 1103
Patent
active
054465486
ABSTRACT:
The present invention is a remote sensing system for real time monitoring of patient position which can report variations in patient setup from day to day as well as motion during individual treatments. In particular, an embodiment of the present invention includes: (a) a source of radiation for applying radiation to a patient; (b) targets affixed to the patient for reflecting radiation impinging thereon; (c) two cameras and a computer for detecting the reflected radiation and for determining the current position of the targets in three-dimensional space; (d) a data store for storing the position of the targets; (e) the computer also serving to compare the current position of the targets with positions stored in the data store; and (f) a display for displaying indicators whenever differences between the current position and the stored position exceed tolerances stored in the data store.
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Abstract entitled "Optical Measurements of Patient Position and Movement in Two Alternative Head Holder Systems", Menke et al., published in the International Journal of Radiation, Oncology, Biology and Physics, vol. 24, Supplement 1, pp. 189-190, Proceedings of the 34th Annual ASTRO Meeting (1992).
El-Hakim Sabry F.
Gerig Lee H.
Edelman Lawrence C.
Evans F. L.
Siemens Medical Systems Inc.
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