Assessment of Computed Tomography Dose Index (CTDI) During CT Pelvimetry Using Monte Carlo Simulation

A pelvimetry examination is sometimes prescribed to a pregnant woman at the end of her pregnancy in order assess dimensions pelvis prior childbirth. This has long been performed by using X-ray, but now increasingly being replaced CT-scan The objective this study radiation doses received during practical CT Hitashi Supria 16-slice scanner. were estimated Monte Carlo (MC)-based simulation with GATE code model scanner machine. operates GEANT4 libraries. polyymethyl metacrylate (PMMA) acrylic phantom 32 cm diameter was modeled represent patient's body. X-ray energy spectrum generated SRS-78 processor used for simulation. executed same exposure parameters as dose 1 mGy, 0.9 and 36.6 mGy.cm, respectively, weighted index (CTDIw), volume (CTDIvol), dose-length product (DLP). MC results provide 1.16 1.07 43.6 CTDIw, CTDIvol, DLP. differences between 16 %, 18 respectively. These are considered quite good agreement. also consistent other similar studies. work proves that usable patient examination.