Correction of motion artifacts in cone-beam CT using a patient-specific respiratory motion model
نویسندگان
چکیده
منابع مشابه
On-the-Fly Motion-Compensated Cone-Beam CT Using an a Priori Motion Model
Respiratory motion causes artifacts in slow-rotating cone-beam (CB) computed tomography (CT) images acquired for example for image guidance of radiotherapy. Respiration-correlated CBCT has been proposed to correct for the respiratory motion, but the use of a subset of the CB projections to reconstruct each frame of the 4D CBCT image limits their quality, thus requiring a longer acquisition time...
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Respiratory motion introduces uncertainties when planning and delivering radiotherapy for lung cancer patients. Cone-beam projections acquired in the treatment room could provide valuable information for building motion models, useful for gated treatment delivery or motion compensated reconstruction. We propose a method for estimating 3D+T respiratory motion from the 2D+T cone-beam projection s...
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PURPOSE To allow for a purely image-based motion estimation and compensation in weight-bearing cone-beam computed tomography of the knee joint. METHODS Weight-bearing imaging of the knee joint in a standing position poses additional requirements for the image reconstruction algorithm. In contrast to supine scans, patient motion needs to be estimated and compensated. The authors propose a meth...
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ژورنال
عنوان ژورنال: Medical Physics
سال: 2010
ISSN: 0094-2405
DOI: 10.1118/1.3397460