Cone beam CT dosimetry: a unified and self-consistent approach including all scan modalities--with or without phantom motion.

Medical Physics
Robert Dixon, John M Boone

Abstract

This article describes a common methodology and measurement technique, encompassing both conventional (helical and axial) CT scanning using phantom translation and cone beam (or narrow fan beam) CT scans about a stationary phantom. Cone beam CT systems having beam widths along the z-axis wide enough to cover a significant anatomical length (50-160 mm) in a single axial rotation (e.g., in cardiac CT) are rapidly proliferating in the clinic, referred to herein as stationary cone beam CT (SCBCT). The integral format of the CTDI paradigm is not appropriate for a stationary phantom, and is not useful for predicting the dose in SCBCT, nor for perfusion studies or CT fluoroscopy. Likewise, the pencil chamber has limited utility in this domain (even one of extended length). By demonstrating, both experimentally and theoretically, the match between the dose distribution f(z) for a wide cone beam and that due to an axial scan series D(z), it is shown that the dose on the central ray of the cone beam f(0) is both spatially colocated and numerically equal to the dose predicted by CTDI for the axial series; and thus f(0) is the logical (and unique) choice for a SCBCT dose-descriptor consistent with the CTDI-based dose of conventional CT. Th...Continue Reading

References

Jul 11, 2003·Medical Physics·Robert L Dixon
Feb 22, 2005·Medical Physics·K D NakonechnyS Rathee
May 18, 2005·Medical Physics·Shinichiro MoriKenya Murase
May 16, 2007·Medical Physics·John M Boone
Jan 22, 2008·Radiographics : a Review Publication of the Radiological Society of North America, Inc·John A BauhsCynthia H McCollough

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Citations

Jan 7, 2014·Medical Physics·Robert L Dixon, John M Boone
Apr 20, 2011·Radiology·Cynthia H McColloughMichael F McNitt-Gray
Oct 29, 2013·Radiation Protection Dosimetry·D TrevisanA Valentini
Apr 28, 2011·Medical Physics·Carles GomàMontserrat Ribas
Feb 11, 2012·Medical Physics·Xinhua LiBob Liu
Jul 4, 2012·Dento Maxillo Facial Radiology·R PauwelsUNKNOWN SEDENTEXCT Project Consortium
Jun 1, 2014·Medical Physics·Marian Axente, Dimitre Hristov
Nov 6, 2014·Medical Physics·David C HansenJoao Seco
Apr 2, 2011·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Ioannis A TsalafoutasIoannis Abatzoglou
Apr 11, 2015·The Canadian Journal of Neurological Sciences. Le Journal Canadien Des Sciences Neurologiques·Elena TonkopiJai J S Shankar
May 11, 2016·Journal of X-ray Science and Technology·Hao GongGuohua Cao
Mar 12, 2019·Physics in Medicine and Biology·S RosendahlT Siiskonen
Jan 28, 2020·Journal of Radiological Protection : Official Journal of the Society for Radiological Protection·Abdullah Abuhaimed, Colin J Martin
Jun 15, 2016·Physics in Medicine and Biology·Victor J Weir
Jan 24, 2015·Physics in Medicine and Biology·Abdullah AbuhaimedDavid J Gentle
May 19, 2011·Journal of Applied Clinical Medical Physics·Sangroh KimTerry T Yoshizumi
Nov 30, 2018·Radiation Protection Dosimetry·Neha ChoudharySanjeev Kumar
May 28, 2014·Physics in Medicine and Biology·P DemanN L Ford

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