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Organ and effective dose evaluation in coronary angiography by using a 320 MDCT based on in-phantom dose measurements with TLDs
- Source :
- Journal of Radiological Protection. 35:597-609
- Publication Year :
- 2015
- Publisher :
- IOP Publishing, 2015.
-
Abstract
- The purpose of this study is to estimate the organ and effective dose (E) from computed tomography coronary angiography (CTCA) on a 320-MDCT scanner. Radiation dose was estimated for the prospectively ECG-gated CTCA in a male phantom. A total of 451 chips of thermoluminescent dosimeter were implanted in the phantom for measuring the organ doses. The effective doses were calculated using measured organ doses and the tissue-weighting factors. The dose length product (DLP) values were recorded and used to develop the conversion coefficient k = 0.017 mSv•(mGy•cm)(-1) (E/DLP). In a 3-beat acquisition, the organ doses ranged from 0.24 to 71.55 mGy, and the doses in breast, bone surface, oesophagus, and lung were higher than 20 mGy. The effective doses in 2-beat and 3-beat acquisition were estimated to be 14.3 and 24.3 mSv. More beats of acquisition led to higher radiation dose. The reported k values for chest CT scan can be used to roughly estimate the E value from CTCA for 320 MDCT.
- Subjects :
- Male
Coronary angiography
medicine.medical_specialty
Cardiac-Gated Imaging Techniques
Dose profile
Coronary Angiography
Radiation Dosage
Effective dose (radiation)
Imaging phantom
Radiation Protection
Thermoluminescent Dosimetry
Humans
Medicine
Waste Management and Disposal
Phantoms, Imaging
business.industry
Public Health, Environmental and Occupational Health
General Medicine
Body Burden
Tomography
Thermoluminescent dosimeter
Radiology
Radiation protection
Tomography, X-Ray Computed
Nuclear medicine
business
Subjects
Details
- ISSN :
- 13616498 and 09524746
- Volume :
- 35
- Database :
- OpenAIRE
- Journal :
- Journal of Radiological Protection
- Accession number :
- edsair.doi.dedup.....58f98be57db6e1175b0b3da62f7ad381