| Project/Area Number |
23591825
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Radiation science
|
|---|
| Research Institution | Oita University of Nursing and Health Sciences |
|---|
Principal Investigator |
KAI Michiaki 大分県立看護科学大学, 看護学部, 教授 (10185697)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ENDO Akira 日本原子力研究開発機構, 研究員 (10354705)
TAKAHASHI Fumiaki 日本原子力研究開発機構, 研究員 (20354706)
SATO Kaoru 日本原子力研究開発機構, 研究員 (80354702)
BAN Nobuhiko 東京医療保健大学, 看護学部, 教授 (70251220)
|
|---|
| Project Period (FY) |
2011 – 2013
|
| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
|
|---|
| Keywords | CT診断 / 臓器線量 / ボクセルファントム / モンテカルロ / CT検査 / モンテカルロ計算 |
|---|
| Research Abstract |
The WAZA-ARI calculator was developed to estimate organ doses from CT scans by utilizing the voxel phantoms as the standard Japanese physical size. This study aimed to determine correction coefficients to estimate organ doses to patients of any size attended to in daily clinical practice including children. Florida University phantoms were used for the dose to children. Different size phantoms were developed by modifying the volume of soft tissues where the deviation of physical sizes in BMI was 2 times lower for thin patients and 2 or 5 times higher for fat patients than the standard. Furthermore, we constructed voxel phantoms based on the CT images of patients of different size and simulated radiation transport in CT examinations to obtain organ doses using Monte Carlo simulation. The results show the linear relationship between effective diameter and organ dose can predict patient-specific organ doses. We completed the WAZA-ARI 2 that can take any sizes and age into account.
|
