Development of a 30-week-pregnant female tomographic model from computed tomography (CT) images for Monte Carlo organ dose calculations

2004 ◽  
Vol 31 (9) ◽  
pp. 2491-2497 ◽  
Author(s):  
Chengyu Shi ◽  
X. George Xu
Keyword(s):  
Computed Tomography ◽  
Monte Carlo ◽  
Organ Dose ◽  
Ct Images ◽  
Pregnant Female ◽  
Dose Calculations

Organ dose in cardiac dual-energy computed tomography: a Monte Carlo study

2022 ◽  
Author(s):  
Delaram Pakravan ◽  
Farshid Babapour Mofrad ◽  
Mohammad Reza Deevband ◽  
Mahdi Ghorbani ◽  
Hamidreza Pouraliakbar
Keyword(s):  
Computed Tomography ◽  
Monte Carlo ◽  
Monte Carlo Study ◽  
Organ Dose ◽  
Dual Energy ◽  
Dual Energy Computed Tomography

scholarly journals Organ doses of the fetus from external environmental exposures

2021 ◽  
Vol 60 (1) ◽  
pp. 93-113
Author(s):  
Nina Petoussi-Henss ◽  
Daiki Satoh ◽  
Helmut Schlattl ◽  
Maria Zankl ◽  
Vladimir Spielmann
Keyword(s):  
Monte Carlo ◽  
Dose Rate ◽  
Organ Dose ◽  
Pregnant Female ◽  
Rate Coefficients ◽  
Monte Carlo Code ◽  
Organ Doses ◽  
Organ Equivalent Dose ◽  
Specific Organ ◽  
External Exposures

AbstractThis article presents nuclide-specific organ dose rate coefficients for environmental external exposures due to soil contamination assumed as a planar source at a depth of 0.5 g cm−2 in the soil and submersion to contaminated air, for a pregnant female and its fetus at the 24th week of gestation. Furthermore, air kerma free-in-air coefficient rates are listed. The coefficients relate the organ equivalent dose rates (Sv s−1) to the activity concentration of environmental sources, in Bq m−2 or Bq m−3, allowing to time-integrate over a particular exposure period. The environmental radiation fields were simulated with the Monte Carlo radiation transport codes PHITS and YURI. Monoenergetic organ dose rate coefficients were calculated employing the Monte Carlo code EGSnrc simulating the photon transport in the voxel phantom of a pregnant female and fetus. Photons of initial energies of 0.015–10 MeV were considered including bremsstrahlung. By folding the monoenergetic dose coefficients with the nuclide decay data, nuclide-specific organ doses were obtained. The results of this work can be employed for estimating the doses from external exposures to pregnant women and their fetus, until more precise data are available which include coefficients obtained for phantoms at different stages of pregnancy.

scholarly journals Estimating organ dose in computed tomography using tube current modulation: A Monte Carlo simulation

2021 ◽  
Vol 19 (3) ◽  
pp. 575-581
Author(s):  
V. Hosseinzadeh ◽  
H. Ghaffari ◽  
A. Rezaeyan ◽  
S. Deilami ◽  
◽  
...  
Keyword(s):  
Computed Tomography ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Organ Dose ◽  
Tube Current Modulation ◽  
Current Modulation ◽  
Tube Current

MO-D-330A-03: Correction of Streaking Artifacts in CT Images and Its Influence On Monte Carlo Dose Calculations

2006 ◽  
Vol 33 (6Part14) ◽  
pp. 2158-2159 ◽  
Author(s):  
M Bazalova ◽  
S Palefsky ◽  
L Beaulieu ◽  
F Verhaegen
Keyword(s):  
Monte Carlo ◽  
Ct Images ◽  
Dose Calculations

scholarly journals A new Monte Carlo tool for organ dose estimation in computed tomography

2020 ◽  
Vol 55 (2) ◽  
pp. 123-134
Author(s):  
C. Adrien ◽  
C. Le Loirec ◽  
S. Dreuil ◽  
J.-M. Bordy
Keyword(s):  
Computed Tomography ◽  
Monte Carlo ◽  
Organ Dose ◽  
Technical Note ◽  
Patient Specific ◽  
Organ Doses ◽  
Ct Dose ◽  
Dose Information ◽  
Ct Dose Index ◽  
Mc Simulation

The constant increase of computed tomography (CT) exams and their major contribution to the collective dose led to international concerns regarding patient dose in CT imaging. Efforts were made to manage radiation dose in CT, mostly with the use of the CT dose index (CTDI). However CTDI does not give access to organ dose information, while Monte Carlo (MC) simulation can provide it if detailed information of the patient anatomy and the source are available. In this work, the X-ray source and the geometry of the GE VCT Lightspeed 64 were modelled, based both on the manufacturer technical note and some experimental data. Simulated dose values were compared with measurements performed in homogeneous conditions with a pencil chamber and then in CIRS ATOM anthropomorphic phantom using both optically stimulated luminescence dosimeters (OSLD) for point doses and XR-QA Gafchromic® films for relative dose maps. Organ doses were ultimately estimated in the ICRP 110 numerical female phantom and compared to data reported in the literature. Comparison of measured and simulated values show that our tool can be used for a patient specific and organ dose oriented radiation protection tool in CT medical imaging.

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