Organ Dose Evaluations Based on Monte Carlo Simulation for CT Examinations Using Tube Current Modulation.
Radiat Prot Dosimetry
; 174(3): 387-394, 2017 Apr 28.
Article
in En
| MEDLINE
| ID: mdl-27342451
ABSTRACT
The aims of this study were to estimate tube current values for each X-ray projection angle used in adult chest computed tomography (CT) and abdomen-pelvis CT examinations with tube current modulation (TCM) and to validate organ doses determined using Monte Carlo (MC) simulations through comparisons with the doses measured using in-phantom dosimetry. For dose simulations, dose distribution images were obtained by inputting the geometry of a CT scanner, scan parameters including estimated TCM curves and CT images of an adult anthropomorphic phantom into MC simulation software. Organ doses were then determined from the dose distribution images. For dose measurements, organ doses were evaluated using radio-photoluminescence glass dosemeters located at various organ positions within the phantom. Relative differences between the simulated and measured organ doses were -2.5 to 11.0% and -1.5 to 10.5% for organs in chest and abdomen-pelvis CT scan ranges, respectively. Thus, the simulated and measured doses agreed well.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Radiation Dosage
/
Tomography, X-Ray Computed
Type of study:
Health_economic_evaluation
Limits:
Humans
Language:
En
Journal:
Radiat Prot Dosimetry
Year:
2017
Document type:
Article
Affiliation country:
Japón