Bowtie filtration for dedicated cone beam CT of the head and neck a simulation study推荐.pdf

BJR © 2013 The Authors. Published by the British Institute of Radiology Received: Revised: Accepted: doi: 10.1259/bjr 23 December 2012 17 May 2013 28 May 2013 Cite this article as: Zhang G, Marshall N, Jacobs R, Liu Q, Bosmans H. Bowtie filtration for dedicated cone beam CT of the head and neck: a simulation study. Br J Radiol 2013;86 FULL PAPER Bowtie filtration for dedicated cone beam CT of the head and neck: a simulation study 1,2G ZHANG, PhD, 1N MARSHALL, PhD, 3R JACOBS, PhD, 2Q LIU, PhD and 1H BOSMANS, PhD 1 Department of Radiology, University Hospitals Leuven, Leuven, Belgium 2Britton Chance Center for Biomedical Photonics, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, China 3Oral Imaging Center, University Hospitals Leuven, Leuven, Belgium Address correspondence to: Dr Qian Liu E-mail: qianliu@ Objective: To investigate the influence of bowtie filtration distance within a 16-cm-diameter water cylinder, varied on dedicated cone beam CT (CBCT) of the head and from 8.7% at the centre to 53.8% at the periphery. Scatter neck. reduction, quantified using scatter-to-primary ratio in Methods: A validated hybrid simulation technique was projection images, was up to 37.6% for a 14-cm-diameter used to model a commercial CBCT system with offset cylindrical contrast phantom. Using the supplied routine scanning geometry, 90 kV tube potential and 145375 mm image reconstruction, bowtie filtration resulted in compa- imaging field of view. Three bowtie filters were formu- rable noise appe