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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
The evaluation of the problems of verification isodose distribution - the simulation of the treatment fields on simulator Acuity.
KOCOUREK, Michal
The verification of the treatment fields{\crq} location on a simulator is one of the main activities within the field of radiation quality. Simulation pictures are compared with reference pictures (DRR). during the simulation. If a patient{\crq}s position during the simulation differs from the reference picture, the deviations are shown in individual axes. The aim of a radiotherapy assistant is to reduce the extent of those deviations to a minimum, or at least to the range of tolerance given in a tolerance table. The accuracy of the setup is an important factor in the process of quality assurance in radiotherapy. There are two methods available for the assessment of deviations on a simulator: - the method of anatomical structures comparison - the method of picture fusion In the case of the method of comparison of anatomical structures, the level of equivalence of the pictures is ascertained by using the multi-leaf collimator{\crq}s lamellas or the degree scale shown in the picture. Further verification of the accuracy of the setup is done in the individual radiotherapists{\crq} workplaces, specifically the linear accelerator and/or the cobalt irradiator, where the DRR is mostly compared with the portal picture. The method of comparison of the anatomical structures is used more frequently at the Radiotherapeutic Clinic of the České Budějovice Hospital than the method of picture fusion.
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See also: similar author names
1 KOCOUREK, Miroslav
5 Kocourek, Martin
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