An isocenter position verification device for electronic portal imaging: physical and dosimetrical characteristics
| Autor: | J. Schauvliege, Wim Duthoy, Bruno Speleers, Vincent Remouchamps, W. De Neve, Y De Deene, K Van Vaerenbergh, Filip Claus, C. De Wagter, B Van Duyse |
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| Rok vydání: | 2001 |
| Předmět: |
Diagnostic Imaging
Medical device Radiotherapy business.industry Isocenter Conformal radiotherapy Dose distribution Gel dosimetry Portal imaging Oncology Position (vector) Humans Medicine Dosimetry Radiology Nuclear Medicine and imaging Dose Fractionation Radiation Electronics business Nuclear medicine Biomedical engineering |
| Zdroj: | Cancer/Radiothérapie. 5:759-765 |
| ISSN: | 1278-3218 |
| DOI: | 10.1016/s1278-3218(01)00137-8 |
| Popis: | The physical and dosimetrical characteristics of a device, designed to visualize the isocenter position on electronic portal images, were examined. The device, to be mounted on the gantry head of the accelerator, containing five spheric lead markers, was designed in order to visualize the isocenter position on portal images. A quality control device was designed to check the reliability of this technique. The disturbance of the dose distribution by the markers was studied with gel dosimetry. The use of markers resulted in a precise and accurate method to visualize the isocenter on portal images. A maximum underdosage of 11%, due to attenuation by the markers, was observed. The use of markers to visualize the isocenter position on portal images, is a fast and reliable method when analyzing patient setup errors with online electronic portal imaging. |
| Databáze: | OpenAIRE |
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