title: Technical note: acquisition of CT models for radiotherapy applications with reduced tube heating.
abstract: The potential or changing computed tomography (CT) protocols to provide data sets that generate high quality digitally reconstructed radiographs (DRRs) from scans with very low tube currents is demonstrated. DRRs were generated from CT data acquired with slice thickness of 1, 3, and 5 mm, using high current to reduce noise in axial images. These DRRs were compared to one generated from a CT scan acquired using 1 mm aperture and very low (10 mA) current. The DRR generated via this technique is comparable to that generated with high current and 1 mm aperture, and higher resolution than from the 3 and 5 mm CT scans.
authors.affiliation: Department of Radiation Oncology, University of Michigan Health Systems, Ann Arbor 48109, USA. jbalter@umich.edu
authors.forename: J M
authors.initials: JM
authors.lastname: Balter
authors.forename: K L
authors.initials: KL
authors.lastname: Lam
mesh_terms: D006801:Humans; D013902:Radiography, Thoracic / Q000379:methods; D011878:Radiotherapy / Q000295:instrumentation / Q000379:methods*; D011880:Radiotherapy Planning, Computer-Assisted; D012984:Software; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000379:methods*