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Poster — Thur Eve — 48: Comparison of Organ Doses and Effective Dose with PCXMC and Phantom Measurements for Neonates
Author(s) -
Ma H,
Omotayo A,
King J,
Elbakri IA
Publication year - 2010
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.3476153
Subject(s) - imaging phantom , thermoluminescent dosimeter , medicine , nuclear medicine , effective dose (radiation) , dosimetry , dosimeter
Monte Carlo (MC) simulations and phantoms measurements are essential methods to estimate patient dose in radiography. We compared organ and effective doses determined using the PCXMC 2.0 MC software with TLD phantom measurements for newborn patients. We used high sensitivity TLD's (TLD‐100H, Harshaw) for organ dose measurements using the ATOM 703D anthropomorphic newborn phantom. TLD's were calibrated, annealed and then placed in pre‐drilled slots at various locations in the phantom representing several internal organs. The thorax and abdomen of the phantom were exposed at techniques similar to those used in the neonatal intensive care unit. The charge read‐out form the TLD's was then converted to organ doses form which an effective dose value was calculated. This value was then compared to that obtained from PCXMC 2.0 (STUK, Finland) by using the same exposure and patient parameters. The Effective dose values were 20.88μSv and 21.10μSv for phantom and PCXMC calculations respectively, yielding a 1.05% difference. Organ doses also showed good agreement. Organs partially exposed or outside of the primary beam showed higher discrepancies. Overall, both methods are useful for dose optimization studies but PCXMC has an advantage in terms of the amount of time and effort required to generate dose estimates.