Extra radiation dose of lungs in male examinees during cardiac computed tomography
The use of multi-detector row computed tomography in cardiac examinations is increasing globally. Several hospitals are yet to establish a practical method for evaluating the extra scattering dose in the lungs (Dlung) of male examinees with different body-weights undergoing cardiac computed...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
VINCA Institute of Nuclear Sciences
2017-01-01
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| Series: | Nuclear Technology and Radiation Protection |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-3994/2017/1451-39941704350T.pdf |
| Summary: | The use of multi-detector row computed tomography in cardiac examinations is
increasing globally. Several hospitals are yet to establish a practical
method for evaluating the extra scattering dose in the lungs (Dlung) of male
examinees with different body-weights undergoing cardiac computed tomography.
To measure the dose in each slice of a lung (Dlung,i), thermoluminescent
dosimeters are inserted into Rando and tissue-equivalent phantoms made of
polymethylmethacrylate and derived from ICRU 48 with masses from 10 to 90 kg.
Dlung was evaluated by weighing the scanned volume of each slice. A practical
method for determining Dlung involves 64-slice computed tomography scans
using a Philips Brilliance computed tomography at 120 kV and 200 mAs, with a
thickness of 1.0 mm. Dlung,i increased with distance from the scanning
region. This experiment yielded Dlung values from 12.1 ± 2.1 mSv (90 kg) to
23.0 ± 3.8 mSv (10 kg). Finally, a simple equation can be used to derive the
relationship between Dlung and the body-weights of a male examinee.
Experimental results are compared with others in the literature. |
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| ISSN: | 1451-3994 1452-8185 |