Τίτλος:
Pediatric personalized CT-dosimetry Monte Carlo simulations, using
computational phantoms
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
The last 40 years Monte Carlo (MC) simulations serve as a “gold
standard” tool for a wide range of applications in the field of
medical physics and tend to be essential in daily clinical practice.
Regarding diagnostic imaging applications, such as computed tomography
(CT), the assessment of deposited energy is of high interest, so as to
better analyze the risks and the benefits of the procedure. The last few
years a big effort is done towards personalized dosimetry, especially in
pediatric applications. In the present study the GATE toolkit was used
and computational pediatric phantoms have been modeled for the
assessment of CT examinations dosimetry. The pediatric models used come
from the XCAT and IT’IS series. The X-ray spectrum of a Brightspeed CT
scanner was simulated and validated with experimental data.
Specifically, a DCT-10 ionization chamber was irradiated twice using 120
kVp with 100 mAs and 200 mAs, for 1 sec in 1 central axial slice
(thickness = 10mm). The absorbed dose was measured in air resulting in
differences lower than 4% between the experimental and simulated data.
The simulations were acquired using similar to 10(10) number of
primaries in order to achieve low statistical uncertainties. Dose maps
were also saved for quantification of the absorbed dose in several
children critical organs during CT acquisition.
Συγγραφείς:
Papadimitroulas, P.
Kagadis, G. C.
Ploussi, A.
Kordolaimi,
S.
Papamichail, D.
Karavasilis, E.
Syrgiamiotis, V. and
Loudos, G.
Εκδότης:
IOP Publishing Ltd
Τίτλος συνεδρίου:
INTERNATIONAL CONFERENCE ON BIO-MEDICAL INSTRUMENTATION AND RELATED
ENGINEERING AND PHYSICAL SCIENCES (BIOMEP 2015)
DOI:
10.1088/1742-6596/637/1/012020
