조사야에 따른 cone-beam computed tomography의 흡수선량 비교
Comparison of absorbed doses of cone-beam computed tomography according to field of view
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Purpose: To compare absorbed doses of cone-beam computed tomography (CBCT) according to field of view (FOV). Materials and Methods: To measure the absorbed doses of CBCT (Hitachi Medical Co.), we placed thermoluminescent dosimeter chips on both the submandibular and parotid glands, esophagus, tongue, and thyroid gland in a dental head phantom (CIRS). We used three image acquisition modes with FOV of different size: panoramic mode (P mode), implant mode (I mode), and dental mode (D mode). Two different dental mode scans were performed. One scanned the right upper molar region (D1), whereas the other scanned the left lower molar region (D2). Results: Average absorbed doses was lowest in D mode (average of D1 and D2, 4272.1 μGy) (p<0.05). Although the averages of absorbed doses between D1 and D2 showed no significant difference (p>0.05), the absorbed doses of esophagus (D1 756.9 μGy, D2 2938.2 μGy) and thyroid gland (D1 344.6 μGy, D2 880.1 μGy) were significantly different between D1 and D2. Conclusion: Since the average of absorbed doses was lowest with the smallest FOV, we must try to select the lowest FOV as possible when performing computed tomography, followed by careful diagnosis.
Abstract
Purpose: To compare absorbed doses of cone-beam computed tomography (CBCT) according to field of view (FOV). Materials and Methods: To measure the absorbed doses of CBCT (Hitachi Medical Co.), we placed thermoluminescent dosimeter chips on both the submandibular and parotid glands, esophagus, tongue, and thyroid gland in a dental head phantom (CIRS). We used three image acquisition modes with FOV of different size: panoramic mode (P mode), implant mode (I mode), and dental mode (D mode). Two different dental mode scans were performed. One scanned the right upper molar region (D1), whereas the other scanned the left lower molar region (D2). Results: Average absorbed doses was lowest in D mode (average of D1 and D2, 4272.1 μGy) (p<0.05). Although the averages of absorbed doses between D1 and D2 showed no significant difference (p>0.05), the absorbed doses of esophagus (D1 756.9 μGy, D2 2938.2 μGy) and thyroid gland (D1 344.6 μGy, D2 880.1 μGy) were significantly different between D1 and D2. Conclusion: Since the average of absorbed doses was lowest with the smallest FOV, we must try to select the lowest FOV as possible when performing computed tomography, followed by careful diagnosis.
참고문헌 (32)
- Pinsky HM, "Accuracy of three-dimensional measurements using cone-beam CT", Dentomaxillofac Radiol, 35, pp.410~416 (2006)
- Rigolone M, "Vestibular surgical access to the palatine root of the superior rst molar: "low-dose cone-beam" CT analysis of the pathway and its anatomic variations", J Endod, 29, pp.773~775 (2003)
- Nakagawa Y, "Preoperative application of limited cone beam computerized tomography as an assessment tool before minor oral surgery", Int J Oral Maxillofac Surg, 31, pp.322~326 (2002)
- Sato S, "Clinical application of a new cone-beam computerized tomography system to assess multiple two-dimensional images for the preoperative treatment planning of maxillary implants: case reports", Quintessence Int, 35, pp.525~528 (2004)
- Hatcher DC, "Cone beam CT for pre-surgical assessment of implant sites", J Calif Dent Assoc, 31, pp.825~833 (2003)
- Maki K, "Computer-assisted simulations in orthodontic diagnosis and the application of a new cone beam X-ray computed tomography", Orthod Craniofac Res, 6(Suppl 1), pp.95~101 (2003)
- Hamada Y, "Application of limited cone beam computed tomography to clinical assessment of alveolar bone grafting: a preliminary report", Cleft Palate Craniofac J, 42, pp.128~137 (2005)
- 이재학, "치과 임플란트 수술 계획시 CT를 이용한 상악동 체적 및 치조골량 측정", Imaging Science in Dentistry, 33(1), pp.5~41 (2003), 대한구강악안면방사선학회
- 김재덕, "기저세포모반증후군 두 증례", Imaging Science in Dentistry, 38(2), pp.109~115 (2008), 대한구강악안면방사선학회
- 이봉호, "치과용 콘빔CT영상에서 총의치 장착 후 하악과두의 위치변화", Imaging Science in Dentistry, 38(1), pp.23~27 (2008), 대한구강악안면방사선학회
- Mozzo P, "A new volumetric CT machine for dental imaging based on the cone-beam technique: preliminary results", Eur Radiol, 8, pp.1558~1564 (1998)
- 김성은, "치과용 콘빔전산화단층영상에서 치조골과 치아의 협설경사 비교", Imaging Science in Dentistry, 38(1), pp.17~22 (2008), 대한구강악안면방사선학회
- 구종국, "CBCT 영상에서 무치악부 임프란트 매식체 주위골 골밀도(HU)의정량적 평가", Imaging Science in Dentistry, 38(1), pp.1~5 (2008), 대한구강악안면방사선학회
- 김문선, "콘빔형 전산화단층영상에서 HU에 의한 두경부 팬텀 경조직의 밀도 측정", Imaging Science in Dentistry, 39(3), pp.115~120 (2009), 대한구강악안면방사선학회
- 김재덕, "임플란트 치료 전 CBCT 영상분석 세 증례", Imaging Science in Dentistry, 37(3), pp.171~180 (2007), 대한구강악안면방사선학회
- 이종녕, "최근 개발된 cone beam computed tomography의 흡수선량 및 유효선량 평가", Imaging Science in Dentistry, 37(2), pp.93~102 (2007), 대한구강악안면방사선학회
- White SC, "Oral radiology; principles and inter-pretation", pp.25~68 (2004), Mosby-Year Book Inc
- International Commission on Radiological Protection, "ICRP publication 60. Radiation protection: 1990 Recommendations of the International Commission on Radiological Protection", pp.68~ (1990), Pergamon Press
- 이의태, "Cone beam형 전산화단층촬영에 의한 흡수선량", Imaging Science in Dentistry, 37(2), pp.87~92 (2007), 대한구강악안면방사선학회
- 김상연, "Cone beam CT와 일반 CT의 흡수선량 및 유효선량 비교평가", Imaging Science in Dentistry, 38(1), pp.7~15 (2008), 대한구강악안면방사선학회
- 조정연, "이동형 구내 방사선촬영기로 촬영한 치근단 방사선사진의흡수선량 및 유효선량 평가", Imaging Science in Dentistry, 37(3), pp.149~156 (2007), 대한구강악안면방사선학회
- Choi SC, "Difference in radiation absorbed dose according to the panoramic radiographic machines", Korean J Oral Maxillofac Radiol, 30, pp.11~15 (2000)
- Hong BH, "Absorbed and effective dose from spiral and computed tomography for the dental implant planning", Korean J Oral Maxillofac Radiol, 31, pp.165~173 (2001)
- Choi SC, "The absorbed doses from each exposure program of the Orthopos® panoramic machine", Korean J Oral Maxillofac Radiol, 31, pp.215~219 (2001)
- Ludlow JB, "Dosimetry of two extraoral direct digital imaging devices: NewTom cone beam CT and Orthophos Plus DS panoramic unit", Dentomaxillofac Radiol, 32, pp.229~234 (2003)
- Ludlow JB, "Dosimetry of 3 CBCT devices for oral and maxillofacial radiology: CB Mercuray, NewTom 3G and i-CAT", Dentomaxillofac Radiol, 35, pp.219~226 (2006)
- Silva MA, "Cone-beam computed tomography for routine orthodontic treatment planning: a radiation dose evaluation", Am J Orthod Dentofacial Orthop, 133(640), pp.e1~e5 (2008)
- Ohman A, "Radiation doses in examination of lower third molars with computed tomography and conventional radiography", Dentomaxillofac Radiol, 37, pp.445~452 (2008)
- Ludlow JB, "Comparative dosimetry of dental CBCT devices and 64-slice CT for oral and maxillofacial radiology", Oral Surg Oral Med Oral Pathol Oral Radiol Endod, 106, pp.106~114 (2008)
- "Dra document 2005 Recommendations of the International Commission on Radiological Protection" (2005)[URL]
- International Commission on Radiological Protection, "ICRP publication 103. The 2007 Recommendations of the International Commission on Radiological Protection", Ann ICRP, 37, pp.1~332 (2007)
- Tsiklakis K, "Dose reduction in maxillofacial imaging using low dose Cone Beam CT", Eur J Radiol, 56, pp.413~417 (2005)