Reducing the Breast Cancer Risk and Radiation Dose of Radiography for Scoliosis in Children: A Phantom Study
Abstract
:1. Introduction
2. Materials and Methods
2.1. Evaluation of BSDs during FRs
2.2. Calculation of the Effective Doses of FRs Using the Monte Carlo Method
3. Results
3.1. BSDs during FRs
3.2. Effective Doses during FRs Using PMC Based on the Monte Carlo Method
4. Discussion
Limitation
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Focus-Image Receptor Distance (cm) | Tube Voltage (kV) | mAs | Beam Projection | Radiation Field Setting (cm2) | |
---|---|---|---|---|---|
Grid (−) | Grid (+) | ||||
120 | 60 | 6.4 | 12.6 | AP/PA | 20 × 47 * |
80 | 2.4 | 4 | |||
100 | 1 | 1.92 | |||
120 | 0.63 | 1.28 | |||
180 | 60 | 12.6 | 25.2 | AP/PA | 20 × 55 |
80 | 5 | 10 | |||
100 | 2.56 | 5 | |||
120 | 1.6 | 3.2 | |||
360 | 60 | 63 | 128 | AP/PA | 20 × 55 |
80 | 25 | 50 | |||
100 | 12.8 | 25 | |||
120 | 8 | 16 |
Patient’s Age (years) | 5 |
height (cm) | 110 |
weight (kg) | 20 |
Anode Angle | 12° |
Tube Voltage | See Table 1 |
Total Filtration | 2.8 mm aluminum |
Monte Carlo Simulation | 107 photon histories |
Grid (−) | Grid (+) | |||||||
---|---|---|---|---|---|---|---|---|
60 kV | 80 kV | 100 kV | 120 kV | 60 kV | 80 kV | 100 kV | 120 kV | |
120 cm | 1.00 | 0.80 | 0.54 | 0.54 | 1.00 | 0.65 | 0.53 | 0.51 |
180 cm | 1.00 | 0.80 | 0.66 | 0.63 | 1.00 | 0.82 | 0.67 | 0.61 |
360 cm | 1.00 | 0.81 | 0.67 | 0.61 | 1.00 | 0.78 | 0.65 | 0.59 |
Grid (−) | Grid (+) | |||||
---|---|---|---|---|---|---|
120 cm | 180 cm | 360 cm | 120 cm | 180 cm | 360 cm | |
60 kV | 1.00 | 0.80 | 0.71 | 1.00 | 0.78 | 0.74 |
80 kV | 1.00 | 0.80 | 0.72 | 1.00 | 0.98 | 0.88 |
100 kV | 1.00 | 0.98 | 0.88 | 1.00 | 0.98 | 0.90 |
120 kV | 1.00 | 0.94 | 0.81 | 1.00 | 0.93 | 0.85 |
Technical Parameters | Surface Dose [μGy] | ||
---|---|---|---|
Beam Projection | Grid | Tube Voltage [kV] | |
PA | (−) (+) | 60–120 | 25–50 |
AP | (−) | 100–120 | 75–95 |
60–100 | 95–170 | ||
(+) | 100–120 | 160–200 | |
60–100 | 200–290 |
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Nemoto, M.; Chida, K. Reducing the Breast Cancer Risk and Radiation Dose of Radiography for Scoliosis in Children: A Phantom Study. Diagnostics 2020, 10, 753. https://doi.org/10.3390/diagnostics10100753
Nemoto M, Chida K. Reducing the Breast Cancer Risk and Radiation Dose of Radiography for Scoliosis in Children: A Phantom Study. Diagnostics. 2020; 10(10):753. https://doi.org/10.3390/diagnostics10100753
Chicago/Turabian StyleNemoto, Manami, and Koichi Chida. 2020. "Reducing the Breast Cancer Risk and Radiation Dose of Radiography for Scoliosis in Children: A Phantom Study" Diagnostics 10, no. 10: 753. https://doi.org/10.3390/diagnostics10100753