표제지
국문요약
목차
I. 서론 10
1. 연구의 필요성 및 목적 10
2. 용어의 정의 12
1) CT값(CT number, CT value) 12
2) 인공물(Artifact) 12
3) 고밀도(금속) 인공물(High Contrast Foreign Body Artifact ; Metallic Artifact) 12
4) 영상화질(Image Quality) 12
5) 치아충전물(Dental Restoration) 13
6) 조영제(Contrast media) 13
7) Radiopaqu 13
8) 관전압(Tube Voltage) 13
II. 대상 및 방법 14
1. CT 값의 분석 14
1) 치아팬텀의 CT값 측정 14
2) 고밀도(금속)인공물 감소 물질의 CT값 측정 15
3) Siliconedental물질을 이용 shield전 후 CT값 측정 15
4) 관전압 변화에 따른 CT값 측정 16
2. 화질 평가 16
1) 화질검사 16
2) Siliconedental물질을 이용 shield전 후 화질 평가 17
3) 관전압 변화에 따른 화질 평가 17
3. 임상 응용 17
III. 결과 19
1. CT 값의 분석 19
1) 치아팬텀 CT값 측정 19
2) 고밀도(금속)인공물 감소 물질의 CT값 측정 21
3) Siliconedental물질을 이용 shield전 후 CT값 측정 22
4) 관전압 변화에 따른 CT값 측정 24
2. 화질 평가 27
1) 화질검사 27
2) Siliconedental물질을 이용 shield전 후 화질 평가 27
3) 관전압 변화에 따른 화질 평가 27
3. 임상 응용 28
IV. 고찰 29
V. 결론 31
참고문헌 32
ABSTRACT 34
Table 1. CT value with change of teeth phantom (unit : HU) 19
Table 2. CT value of materials reducing metal artifact (unit : HU) 21
Table 3. CT value of teeth phantom with silicone shield and without silicone shield 23
Table 4. CT value with change of kVp (unit : HU) 25
Table 5. Evaluation of image quality with silicone shield and without silicone shield 27
Table 6. Evaluation of image quality and with change of kVp 28
Figure 1. General teeth and Restoration Teeth Phantom of 4 teeth were arranged 15
Figure 2. Phantom of materials reducing High Contrast(metallic) artifact 15
Figure 3. Phantom with silicone shields 16
Figure 4. AAPM phantom for evaluation of image quality 17
Figure 5. Phantom of tooth silicone shield 18
Figure 6. Image of general teeth 20
Figure 7. Image of teeth with metal restoration and orthodontic appliances 20
Figure 8. Graph of CT value with change of teeth phantom (unit : HU) 20
Figure 9. Image of materials reducing metal artifact 21
Figure 10. Graph of materials reducing metal artifact 22
Figure 11. Image of teeth without silicone shield on teeth 23
Figure 12. Image of metal artifact with silicone shield on teeth 23
Figure 13. CT value of teeth phantom with silicone shield and without silicone shield (unit : HU) 24
Figure 14. Phantom Image with metal and appliance with change of kVp 26
Figure 15. Graph of CT value ratio with change of kVp 26
Figure 16. Image of teeth without(left) and with(right) tooth silicone shield 28