SP-0520: 3D vs 4D CBCT: Clinical indications, implementation, and practicalities
نویسندگان
چکیده
منابع مشابه
3D vs. 4D Ontologies in Enterprise Modeling
This paper presents a comparison between a 3D and a 4D ontology, with the purpose of identifying modelling variations that arise from using these different kind of ontologies. The modelling variations are illustrated by using 2 enterprise modelling enigmas on which both ontologies are applied. The goal of our comparison is to demonstrate that the choice of an ontology impacts the representation...
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In Image-Guided RadioTherapy (IGRT) of lung tumors, patients undergo a 4D CT, on the basis of which their treatment is planned. It is implicitely assumed that their breathing motion will not change much throughout the treatment, and remain close to what it was during the 4D CT acquisition. During the treatment, several cone beam CT acquisitions are performed, and used to re-position the patient...
متن کاملDifference in performance between 3D and 4D CBCT for lung imaging: a dose and image quality analysis
The study was to describe and to compare the performance of 3D and 4D CBCT imaging modalities by measuring and analyzing the delivered dose and the image quality. The 3D (Chest) and 4D (Symmetry) CBCT Elekta XVI lung IGRT protocols were analyzed. Dose profiles were measured with TLDs inside a dedicated phantom. The dosimetric indicator cone-beam dose index (CBDI) was evaluated. The image qualit...
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In this study, we compared the registration effectiveness of 4D cone-beam computed tomography (CBCT) and 3D-CBCT for image-guided radiotherapy in 20 Stage IA non-small-cell lung cancer (NSCLC) patients. Patients underwent 4D-CBCT and 3D-CBCT immediately before radiotherapy, and the X-ray Volume Imaging software system was used for image registration. We performed automatic bone registration and...
متن کاملAutoadaptive phase-correlated (AAPC) reconstruction for 4D CBCT.
PURPOSE Kilovoltage cone-beam computed tomography (CBCT) is widely used in image-guided radiation therapy for exact patient positioning prior to the treatment. However, producing time series of volumetric images (4D CBCT) of moving anatomical structures remains challenging. The presented work introduces a novel method, combining high temporal resolution inside anatomical regions with strong mot...
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ژورنال
عنوان ژورنال: Radiotherapy and Oncology
سال: 2013
ISSN: 0167-8140
DOI: 10.1016/s0167-8140(15)32826-7