Thorax organ dose estimation in computed tomography based on patient CT data using Monte Carlo simulation

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Fallah Mohammadi Gh.R.; RIYAHI ALAM N.; GERAILY GH.; PAYDAR R.

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Journal: International Journal of Radiation Research Year:2016 | Volume:14 | Issue:4 Page(s): 313-321

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Information Journal Paper

Title

Thorax organ dose estimation in computed tomography based on patient CT data using Monte Carlo simulation

Author(s)

Fallah Mohammadi Gh.R. | RIYAHI ALAM N. | GERAILY GH. | PAYDAR R. | Issue Writer Certificate

Keywords

Organ dose

pat ient specific dose

computed tomography

MC simulation

EGSnrc/BEAMnrc

Abstract

Background: This study presents pa ent specific and Organ dose es ma on in computed tomography (CT) imaging of thorax directly from pa ent CT image using Monte Carlo simula on. Pa ent's CT image is considered as the pa ent specific phantom and the best representa ve of pa ent physical index in order to calculate specific Organ dose. Materials and Methods: EGSnrc / BEAMnrc Monte Carlo (MC) System was used for CT scanner simula on and DOSXYZnrc was used in order to produce pa ent specific phantom and irradia on of photons to phantom in step and shoot mode (axial mode). In order to calculate pa ent thorax Organ dose, pa ent CT image of thorax as voxelized phantom was divided to a 64x64x20 matrix and 6. 25 x 6. 25 x 6. 25 mm3 voxel size and this phantom was imported to DOSXYZnrc code. MC results in unit of Gy/par cle were converted to absorbed dose in unit of mGy by a conversion factor (CF). We calculated pa ent thorax Organ dose in MC simula on from all irradiated slices, in 120 kV and 80 kV photon energies. Results: Effec ve dose was obtained from Organ dose and organ weigh ng factor. Esophagus and spinal cord received the lowest, and bone received the highest dose. In our study, effec ve dose in CT of thorax was 7. 4 mSV and 1. 8 mSv in 120 and 80 kV, respec vely. Conclusion: The results of this study might be used to provide the actual pa ent Organ dose in CT imaging and calcula on of real effec ve dose based on Organ dose.

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APA: Copy

Fallah Mohammadi, Gh.R., RIYAHI ALAM, N., GERAILY, GH., & PAYDAR, R.. (2016). Thorax organ dose estimation in computed tomography based on patient CT data using Monte Carlo simulation. INTERNATIONAL JOURNAL OF RADIATION RESEARCH, 14(4), 313-321. SID. https://sid.ir/paper/286857/en

Vancouver: Copy

Fallah Mohammadi Gh.R., RIYAHI ALAM N., GERAILY GH., PAYDAR R.. Thorax organ dose estimation in computed tomography based on patient CT data using Monte Carlo simulation. INTERNATIONAL JOURNAL OF RADIATION RESEARCH[Internet]. 2016;14(4):313-321. Available from: https://sid.ir/paper/286857/en

IEEE: Copy

Gh.R. Fallah Mohammadi, N. RIYAHI ALAM, GH. GERAILY, and R. PAYDAR, “Thorax organ dose estimation in computed tomography based on patient CT data using Monte Carlo simulation,” INTERNATIONAL JOURNAL OF RADIATION RESEARCH, vol. 14, no. 4, pp. 313–321, 2016, [Online]. Available: https://sid.ir/paper/286857/en

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