title: Demonstration of dose and scatter reductions for interior computed tomography.
abstract: With continuing developments in computed tomography (CT) technology and its increasing use of CT imaging, the ionizing radiation dose from CT is becoming a major public concern particularly for high-dose applications such as cardiac imaging. We recently proposed a novel interior tomography approach for x-ray dose reduction that is very different from all the previously proposed methods. Our method only uses the projection data for the rays passing through the desired region of interest. This method not only reduces x-ray dose but scatter as well. In this paper, we quantify the reduction in the amount of x-ray dose and scattered radiation that could be achieved using this method. Results indicate that interior tomography may reduce the x-ray dose by 18% to 58% and scatter to the detectors by 19% to 59% as the FOV is reduced from 50 to 8.6 cm.
authors: Biomedical Imaging Division, VT-WFU School of Biomedical Engineering & Science, Wake Forest University, Winston-Salem, NC 27157, USA. dkbharkhada@yahoo.com
authors: Deepak
authors: D
authors: Bharkhada
authors: Hengyong
authors: H
authors: Yu
authors: Robert
authors: R
authors: Dixon
authors: Yuchuan
authors: Y
authors: Wei
authors: J Jeffrey
authors: JJ
authors: Carr
authors: J Daniel
authors: JD
authors: Bourland
authors: Ryan
authors: R
authors: Best
authors: Richard
authors: R
authors: Hogan
authors: Ge
authors: G
authors: Wang
mesh_terms: D002138:Calibration; D006801:Humans; D019047:Phantoms, Imaging; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods*; D012542:Scattering, Radiation; D014057:Tomography, X-Ray Computed / Q000379:methods*