Does administering iodine in radiological procedures increase patient doses? Wenjun He, Walter Huda, Eugene Mah, and Hai Yao Citation: Medical Physics 41, 113901 (2014); doi: 10.1118/1.4898594 View online: http://dx.doi.org/10.1118/1.4898594 View Table of Contents: http://scitation.aip.org/content/aapm/journal/medphys/41/11?ver=pdfcov Published by the American Association of Physicists in Medicine Articles you may be interested in Phantomless patient-specific TomoTherapy QA via delivery performance monitoring and a secondary Monte Carlo dose calculation Med. Phys. 41, 101703 (2014); 10.1118/1.4894721 Comparison of patient specific dose metrics between chest radiography, tomosynthesis, and CT for adult patients of wide ranging body habitus Med. Phys. 41, 023901 (2014); 10.1118/1.4859315 Effective and equivalent organ doses in patients undergoing coronary angiography and percutaneous coronary interventions Med. Phys. 38, 2168 (2011); 10.1118/1.3561508 Application- and patient size-dependent optimization of x-ray spectra for CT Med. Phys. 36, 993 (2009); 10.1118/1.3075901 M CPI © : A sub-minute Monte Carlo dose calculation engine for prostate implants Med. Phys. 32, 3688 (2005); 10.1118/1.2126822
Does administering iodine in radiological procedures increase patient doses? Wenjun He Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina 29425
Walter Huda and Eugene Mah Department of Radiology and Radiological Science, Medical University of South Carolina (MUSC), Charleston, South Carolina 29425
Hai Yaoa) Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina 29425
(Received 16 May 2014; revised 2 October 2014; accepted for publication 3 October 2014; published 30 October 2014) Purpose: The authors investigated the changes in the pattern of energy deposition in tissue equivalent phantoms following the introduction of iodinated contrast media. Methods: The phantom consisted of a small “contrast sphere,” filled with water or iodinated contrast, located at the center of a 28 cm diameter water sphere. Monte Carlo simulations were performed using 5 codes, validated by simulating irradiations with analytical solutions. Monoenergetic x-rays ranging from 35 to 150 keV were used to simulate exposures to spheres containing contrast agent with iodine concentrations ranging from 1 to 100 mg/ml. Relative values of energy imparted to the contrast sphere, as well as to the whole phantom, were calculated. Changes in patterns of energy deposition around the contrast sphere were also investigated. Results: Small contrast spheres can increase local absorbed dose by a factor of 13, but the corresponding increase in total energy absorbed was negligible (
Does administering iodine in radiological procedures increase patient doses? Wenjun He Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina 29425
Walter Huda and Eugene Mah Department of Radiology and Radiological Science, Medical University of South Carolina (MUSC), Charleston, South Carolina 29425
Hai Yaoa) Clemson-MUSC Bioengineering Program, Department of Bioengineering, Clemson University, Charleston, South Carolina 29425
(Received 16 May 2014; revised 2 October 2014; accepted for publication 3 October 2014; published 30 October 2014) Purpose: The authors investigated the changes in the pattern of energy deposition in tissue equivalent phantoms following the introduction of iodinated contrast media. Methods: The phantom consisted of a small “contrast sphere,” filled with water or iodinated contrast, located at the center of a 28 cm diameter water sphere. Monte Carlo simulations were performed using 5 codes, validated by simulating irradiations with analytical solutions. Monoenergetic x-rays ranging from 35 to 150 keV were used to simulate exposures to spheres containing contrast agent with iodine concentrations ranging from 1 to 100 mg/ml. Relative values of energy imparted to the contrast sphere, as well as to the whole phantom, were calculated. Changes in patterns of energy deposition around the contrast sphere were also investigated. Results: Small contrast spheres can increase local absorbed dose by a factor of 13, but the corresponding increase in total energy absorbed was negligible (
