1
|
Raudabaugh J, Nguyen G, Lowry C, Januzis N, Colsher J, Nelson R, Yoshizumi TT. EFFECTIVE DOSE ESTIMATION FROM ORGAN DOSE MEASUREMENTS IN FAST-kV SWITCH DUAL ENERGY COMPUTED TOMOGRAPHY. Radiat Prot Dosimetry 2018; 182:352-358. [PMID: 30590847 DOI: 10.1093/rpd/ncy072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 04/16/2018] [Indexed: 06/09/2023]
Abstract
The purpose of this study was to validate a novel approach to estimating effective dose (E) in 'fast-kV switch dual energy computed tomography' using MOSFET detectors. The effective energy of the combined dual energy environment was characterized with the dual energy CT scanner and then MOSFETs were calibrated matching to the effective energy of the dual energy CT beam with a conventional CT beam. The calibration method was then experimentally validated by comparing the dose between MOSFET and an ion chamber (IC) using a standard CTDI body phantom. The measured doses of the MOSFET and IC were 17.1 mGy ± 3.8% and 17.1 mGy ± 0.4%, respectively. To measure organ doses, an adult anthropomorphic phantom loaded with 18 MOSFET detectors was scanned using a standard fast-kV switch dual energy abdomen/pelvis CT protocol. E was calculated by applying ICRP 103 tissue weighting factors as well as partial volume correction factors for organs that were not completely covered by the protocol field-of-view. E from the dual energy abdomen/pelvis CT was calculated to be 17.8 mSv ± 11.6%. This calculation was then compared to E from dose length product method, which yielded 14.62 mSv.
Collapse
Affiliation(s)
- Justin Raudabaugh
- Medical Physics Graduate Program, Duke University, Durham, NC, USA
- Duke Radiation Dosimetry Laboratory, Duke University Medical Center, Durham, NC, USA
| | - Giao Nguyen
- Duke Radiation Dosimetry Laboratory, Duke University Medical Center, Durham, NC, USA
| | - Carolyn Lowry
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
| | - Natalie Januzis
- Environmental Health & Radiation Safety, University of Pennsylvania, Philadelphia, PA, USA
| | - James Colsher
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
| | - Rendon Nelson
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
| | - Terry T Yoshizumi
- Duke Radiation Dosimetry Laboratory, Duke University Medical Center, Durham, NC, USA
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
| |
Collapse
|
2
|
Chen B, Barnhart H, Richard S, Robins M, Colsher J, Samei E. Volumetric quantification of lung nodules in CT with iterative reconstruction (ASiR and MBIR). Med Phys 2013; 40:111902. [DOI: 10.1118/1.4823463] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
3
|
Chen B, Barnhart H, Richard S, Colsher J, Amurao M, Samei E. Quantitative CT: technique dependence of volume estimation on pulmonary nodules. Phys Med Biol 2012; 57:1335-48. [DOI: 10.1088/0031-9155/57/5/1335] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
4
|
Park H, Bowsher J, Colsher J, Stern E, Turkington T. SU-GG-I-49: Iterative Reconstruction of Slow Rotation CT Data with Projection Object Masks to Decrease Motion Effects. Med Phys 2008. [DOI: 10.1118/1.2961447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
5
|
Li X, Samei E, Thomas A, Colsher J, Toth T, Frush D. SU-FF-I-28: Evaluation of a Noise Addition Software for Simulating Low Dose MDCT Images. Med Phys 2007. [DOI: 10.1118/1.2760405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|
6
|
Hines H, Kayayan R, Colsher J, Hashimoto D, Schubert R, Fernando J, Simcic V, Vernon P, Sinclair RL. National Electrical Manufacturers Association recommendations for implementing SPECT instrumentation quality control. J Nucl Med 2000; 41:383-9. [PMID: 10688125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023] Open
Affiliation(s)
- H Hines
- National Electrical Manufacturers Association, Rosslyn, Virginia 22209, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Hines H, Kayayan R, Colsher J, Hashimoto D, Schubert R, Fernando J, Simcic V, Vernon P, Sinclair RL. Recommendations for implementing SPECT instrumentation quality control. Nuclear Medicine Section--National Electrical Manufacturers Association (NEMA). Eur J Nucl Med 1999; 26:527-32. [PMID: 10382098 DOI: 10.1007/s002590050421] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
8
|
Hines H, Kayayan R, Colsher J, Hashimoto D, Schubert R, Fernando J, Simcic V, Vernon P, Sinclair RL. National Electrical Manufacturers Association recommendations for implementing SPECT instrumentation quality control. J Nucl Med Technol 1999; 27:67-72. [PMID: 10322582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
|