지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
오류제보하기
Purpose: Kilovoltage computed tomography (kV-CT) is essential for radiation treatment planning. However, kV-CT images are significantly distorted by artifacts when a metallic prosthesis is present in the patient's body. Thus, the accuracies of target delineation and treatment dose calculation are inevitably lowered. We evaluated the accuracy of the calculated doses using an image restoration method with hybrid CT, which was introduced in our previous study. Methods: A cylindrical phantom containing four metals, namely, silver, copper, tin, and tungsten, was scanned using kV-CT and megavoltage CT to produce hybrid CT images. We created six verification plans for three head and neck patients on kV-CT and hybrid CT images of the phantom and calculated their doses. The actual doses were measured with film patches during beam delivery using tomotherapy. We used the gamma evaluation method to compare dose distribution between kV-CT and hybrid CT with three gamma criteria, namely, 3%/3 mm, 2%/2 mm, and 1%/1 mm. Results: The gamma pass rates decreased as the gamma criteria were strengthened, and the pass rate of hybrid CT was higher than that of kV-CT in all cases. When the 1%/1 mm criterion was used, the difference in gamma pass rates between them was up to 13%p. Conclusions: According to our findings, we expect that the use of hybrid CT can be a suitable approach to avoid the effect of severe metal artifacts on the accuracy of dose calculation and contouring.
목차
등록된 정보가 없습니다.
참고문헌 (20)
참고문헌 신청
Glover GH / 1981 / An algorithm for the reduction of metal clip artifacts in CT reconstructions / Med Phys 8:799~807
Yazdi M / 2005 / An adaptive approach to metal artifact reduction in helical computed tomography for radiation therapy treatment planning : experimental and clinical studies / Int J Radiat Oncol Biol Phys 62:1224~1231
Zhao S / 2000 / X-ray CT metal artifact reduction using wavelets : an application for imaging total hip prostheses / IEEE Trans Med Imaging 19:1238~1247
Kalender WA / 1987 / Reduction of CT artifacts caused by metallic implants / Radiology 164:576~577
Mahnken AH / 2003 / A new algorithm for metal artifact reduction in computed tomography : in vitro and in vivo evaluation after total hip replacement / Invest Radiol 38:769~775
Yazdi M / 2005 / An adaptive approach to metal artifact reduction in helical computed tomography for radiation therapy treatment planning : experimental and clinical studies / Int J Radiat Oncol Biol Phys 62:1224~1231
Zhao S / 2000 / X-ray CT metal artifact reduction using wavelets : an application for imaging total hip prostheses / IEEE Trans Med Imaging 19:1238~1247
Kalender WA / 1987 / Reduction of CT artifacts caused by metallic implants / Radiology 164:576~577
Mahnken AH / 2003 / A new algorithm for metal artifact reduction in computed tomography : in vitro and in vivo evaluation after total hip replacement / Invest Radiol 38:769~775
함께 읽어보면 좋을 논문
논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!
-
History of the Photon Beam Dose Calculation Algorithm in Radiation Treatment Planning System
의학물리
2020 .01
-
Metal artifact production and reduction in CBCT with different numbers of basis images
Imaging science in dentistry
2018 .01
-
Development of a Flexible Eye Shield Phantom for Artifact-Free Computed Tomography Images
의학물리
2024 .09
-
Basic Physical Principles and Clinical Applications of Computed Tomography
의학물리
2021 .01
-
Evaluating the Effects of Dose Rate on Dynamic Intensity-Modulated Radiation Therapy Quality Assurance
의학물리
2021 .12
-
Level of radiation dose in university hospital noninsured private health screening programs in Korea
Environmental Analysis Health and Toxicology
2016 .12
-
Ability and accuracy in drug dosage calculations of nursing students
한국간호교육학회 학술대회
2016 .05
-
Unusual Brain Computed Tomography Artifact in Cerebellum Mimicking Hemorrhage: A Case Report
Journal of trauma and injury : JTI
2015 .01
-
Significantly Low Effective Dose from <sup>18</sup>FDG PET/CT Scans Using Dose Reducing Strategies: "Lesser is Better"
Asian Pacific journal of cancer prevention : APJCP
2016 .01
-
Dosimetric Effects of Low Dose 4D CT Using a Commercial Iterative Reconstruction on Dose Calculation in Radiation Treatment Planning: A Phantom Study
의학물리
2017 .03
-
SEALONE (Safety and Efficacy of Coronary Computed Tomography Angiography with Low Dose in Patients Visiting Emergency Room) trial: study protocol for a randomized controlled trial
Clinical and Experimental Emergency Medicine
2017 .01
-
PET-CT에서 감쇠보정 영상과 비감쇠보정 영상을 통한 Metal Artifact 보정에 대한 고찰
핵의학기술
2016 .01
-
폐암의 호흡동조방사선치료 시 변형영상정합을 이용한 4차원 선량평가
대한방사선치료학회지
2018 .01
-
저선량 핵의학 감마카메라 영상장치의 최근 발전
의공학회지
2015 .01
-
The Crucial Role of the Establishment of Computed Tomography Density Conversion Tables for Treating Brain or Head/Neck Tumors
의학물리
2021 .09
-
Uncertainty Assessment: Relative versus Absolute Point Dose Measurement for Patient Specific Quality Assurance in EBRT
의학물리
2017 .09
-
Magnitude of beam-hardening artifacts produced by gutta-percha and metal posts on cone-beam computed tomography with varying tube current
Imaging science in dentistry
2020 .01
-
Acceptance Test and Clinical Commissioning of CT Simulator
의학물리
2019 .01
-
Clinical usefulness of post-operative 18F-fluorodeoxyglucose positron emission tomography-computed tomography in canine hemangiosarcoma
Journal of Veterinary Science
2016 .06
-
A dose monitoring system for dental radiography
Imaging science in dentistry
2016 .01
이 논문의 저자 정보
최근 본 자료
댓글(0)
0