Abstract:
:A Monte Carlo based computational procedure for determining organ doses and effective doses has been described for two procedures used in newly developed image-guided radiation treatment: kilovoltage cone-beam computed tomography (kV CBCT) and mega-voltage computed tomography (MV CBCT). A whole-body patient computational phantom, VIP-Man phantom, is employed for Monte Carlo dose calculations. Results indicate that the thyroid dose is always the highest in head and neck (H&N) scan for both kV and MV CBCT, and the bladder dose is the highest in prostate scan for both kV and MV CBCT. For the VIP-Man phantom, it has been found that the effective dose for kV CBCT (assuming a total exposure of 1350 mAs) is approximately 9.5 mSv for the two anatomical sites, whereas the effective dose for MV CBCT (assuming a total of 6 monitor unit) ranges from 5.10 mSv for the H&N case to 8.39 mSv for the prostate scan. The estimated whole-body effective doses allow different imaging procedures to be compared and evaluated.
journal_name
Radiat Prot Dosimetryjournal_title
Radiation protection dosimetryauthors
Gu J,Bednarz B,Xu XG,Jiang SBdoi
10.1093/rpd/ncn200subject
Has Abstractpub_date
2008-01-01 00:00:00pages
431-43issue
4eissn
0144-8420issn
1742-3406pii
ncn200journal_volume
131pub_type
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