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Replacing CT/MRI in radiotherapy chain with MRI-only will remove CT/MRI fusion uncertainties and avoid the patient the dose of ionizing radiation from CT.We propose to generate pseudo-CT (pCT) from conventional MRI and to assess it for MRI-only brain radiotherapy planning (RTP).In twelve patients with brain tumors, CT and contrast-enhanced T1-weighted MRI were registered. A library of patches was...
CBCT are frequently used for patient treatment verification. Hence, generated synthetic-CT (sCT) for MRI-only treatment planning workflow needs to be assessed for image guided radiation therapy (IGRT) using CBCT as well.For brain cancer patients, we investigated the effectiveness of using sCT that are generated from MRI instead of CT for CBCT-based IGRT.Twelve patients with co-registered CT and conventional...
An evaluation of two software tools dedicated to an automatic analysis of the CT scanner image spatial resolution is presented in this paper. The methods evaluated consist of calculating the modulation transfer function (MTF) of the CT scanners; the first uses an image of an impulse source, while the second method proposed by Droege and Morin uses an image of cyclic bar patterns. Two digital test...
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