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4. Patient dose for computed tomography examination: dose reference levels and effective doses based on a national survey of 2013 in Korea

Author

Yon Min Kim, Joon Yoon, Moon Chan Kim, Yoon Chul Nam, and Dong Kyoon Han

Subjects
medicine.medical_specialty, Computed tomography, Radiation Dosage, Liver ct, Radiation Monitoring, Reference Values, Ct examination, Surveys and Questionnaires, Abdomen, Republic of Korea, medicine, Humans, Computer Simulation, Radiology, Nuclear Medicine and imaging, Radiation, Radiological and Ultrasound Technology, medicine.diagnostic_test, Phantoms, Imaging, business.industry, Public Health, Environmental and Occupational Health, Brain, General Medicine, medicine.anatomical_structure, Quartile, Angiography, Body Burden, Radiography, Thoracic, Lumbar spine, Patient dose, Radiology, Tomography, X-Ray Computed, Nuclear medicine, business
Abstract

14,620 sets of patient dose data were obtained for 31 different models of computed tomography (CT) equipment (total 73) with 18 types of CT examination in Korea. Specific diagnostic reference levels (DRLs) for this study in terms of third quartile volumetric CT dose index in mGy [and dose-length product (DLP) in mGy.cm] are as follows: head, 53 (910); neck, 20 (770); chest, 14 (710); abdomen, 14 (1000); stomach, 14 (1000); liver, 14 (1700); pancreas, 14 (1700); kidney, 14 (2100); cervical spine, 30 (600); lumbar spine, 25 (760); hip, 17 (600); cardiac CT angiography, 45 (1250); head CT angiography, 43 (1900); liver CT angiography, 14 (1400) and thoraco-abdominal CT angiography, 16 (2000). In the present study, DRLs in terms of volumetric CT dose index were below previously published reference levels, partly because the newer CT equipments have improved technology that facilitates lower patient dose. Meanwhile, DRLs in terms of DLP were higher, because multi-phase scanning protocols with prolonged scan coverage have been widely used.

Published
2014
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5. PATIENT DOSE FOR COMPUTED TOMOGRAPHY EXAMINATION: DOSE REFERENCE LEVELS AND EFFECTIVE DOSES BASED ON A NATIONAL SURVEY OF 2013 IN KOREA.

Author

Moon Chan Kim, Dong Kyoon Han, Yoon Chul Nam, Yon Min Kim, and Joon Yoon

Subjects
PATIENTS, ABSORBED dose, ANGIOGRAPHY, SCANNING systems
Abstract

14 620 sets of patient dose data were obtained for 31 different models of computed tomography (CT) equipment (total 73) with 18 types of CT examination in Korea. Specific diagnostic reference levels (DRLs) for this study in terms of third quartile volumetric CT dose index in mGy [and dose-length product (DLP) in mGy.cm] are as follows: head, 53 (910); neck, 20 (770); chest, 14 (710); abdomen, 14 (1000); stomach, 14 (1000); liver, 14 (1700); pancreas, 14 (1700); kidney, 14 (2100); cervical spine, 30 (600); lumbar spine, 25 (760); hip, 17 (600); cardiac CT angiography, 45 (1250); head CT angiography, 43 (1900); liver CT angiography, 14 (1400) and thoraco-abdominal CT angiography, 16 (2000). In the present study, DRLs in terms of volumetric CT dose index were below previously published reference levels, partly because the newer CT equipments have improved technology that facilitates lower patient dose. Meanwhile, DRLs in terms of DLP were higher, because multi-phase scanning protocols with prolonged scan coverage have been widely used. [ABSTRACT FROM AUTHOR]

Published
2015
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