The influence of the bow tie filtration on the dose and image quality for the Elekta XVI coneBeam CT
نویسنده
چکیده
Introduction Cone Beam Computer Tomography (CBCT) is used to control the position of the patient based on internal body structures. Thereby, the CBCT data set is fitted to the planning CT image. The accuracy of this alignment process strongly depends on the quality of the CBCT images. The radiotherapy department of the cantonal hospital St.Gallen operates two Elekta Synergy linacs equipped with an integrated CBCT. One linac is equipped with a bowtie filter which reduces the dose originating from the body surface and, in this way, reduces image artefacts. It was the aim of the presented study to evaluate the influence of the bowtie filter on the image quality and the dose to the patient.
منابع مشابه
The influence of bowtie filtration on cone-beam CT image quality.
The large variation of x-ray fluence at the detector in cone-beam CT (CBCT) poses a significant challenge to detectors' limited dynamic range, resulting in the loss of skinline as well as reduction of CT number accuracy, contrast-to-noise ratio, and image uniformity. The authors investigate the performance of a bowtie filter implemented in a system for image-guided radiation therapy (Elekta onc...
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