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Title Page
Contents
ABSTRACT 6
I. Introduction 8
II. Materials and Methods 10
1. Patients 10
2. CT and MRI acquisition 10
3. Data-pre-processing 11
4. Network training and sCT generation 11
5. Assessment of sCT quality 12
6. Statistical analysis 14
III. Results 15
1. Patients' characteristics 15
2. Image quality 15
3. Dosimetric comparison 16
4. Range evaluation 16
IV. Discussion 17
V. Conclusion 20
References 21
논문요약 24
Figure 1. Schematic structures of the deep learning-based synthetic computed tomography... 27
Figure 2. Architectures of the generator and discriminator used in this study. The number at... 28
Figure 3. Example of original (A) and synthetic computed tomography generated from... 29
Figure 4. Comparison of mean error (left plots), mean absolute error (middle plots), and peak signal-to-noise ratio (right plots) according to... 30
Figure 5. Comparison of mean Hounsfield units of original computed tomography and synthetic computed tomography for body (left plots),... 31
Figure 6. Comparison of dice-similarity coefficients for body (left plots), bone (middle plots), and soft tissue (right plots) in synthetic... 32
Figure 7. Comparison of Hausdorff distance for body (left plots), bone (middle plots), and soft tissue (right plots) in synthetic computed... 33
Figure 8. Example for the comparison of dosimetric distributions on original and synthetic computed tomography according to the deep... 34
Figure 9. Example of the map for gamma values. The gamma values on axial, coronal, and sagittal views for volumetric modulated arc... 35
Figure 10. Difference of dosimetric parameters in planning target volume on synthetic computed tomography according to the deep learning... 36
Figure 11. Difference of dosimetric parameters in organs at risk on synthetic computed tomography according to the deep learning techniques... 37
Figure 12. Comparisons of gamma indices among the synthetic computed tomography according to the deep learning techniques for... 38
Figure 13. Beam range differences on synthetic computed tomography according to the deep... 39
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