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Dosimetric Comparison of 6 MV Flattening Filter Free and 6 MV Stereotactic Radiosurgery Beam Using 4 mm Conical Collimator for Trigeminal Neuralgia Radiosurgery

첫 페이지 보기
  • 발행기관
    대한방사선방어학회 바로가기
  • 간행물
    방사선방어학회지 KCI 등재 바로가기
  • 통권
    VOLUME 43 NUMBER 3 (2018.09)바로가기
  • 페이지
    pp.107-113
  • 저자
    Vaibhav R Mhatre, Pranav Chadha, Abhaya P Kumar
  • 언어
    영어(ENG)
  • URL
    https://www.earticle.net/Article/A337999

원문정보

초록

영어
Background: The purpose of our study was to compare the dosimetric advantages of Flattening filter free (FFF) beams for trigeminal neuralgia patients using 4 mm conical collimators over previously treated patients with 6 MV SRS beam. Materials and Methods: A retrospective study was conducted for 5 TN patients who had been previously treated at our institution using frame-based, LINAC-based stereotactic radiosurgery (SRS) on Novalis Tx using 6 MV SRS beam were replanned on 6X FFF beams on Edge Linear accelerator with same beam angles and dose constraints using 4 mm conical collimator. The total number of monitor units along with the beam on time was compared for both Edge and Novalis Tx by redelivering the plans in QA mode of LINAC to compare the delivery efficiency. Plan quality was evaluated by homogeneity index (HI) and Paddick gradient index (GI) for each plan. We also analyzed the doses to brainstem and organ at risks (OARs). Results and Discussion: A 28% beam-on time reduction was achieved using 6X FFF when compared with 6X SRS beam of Novalis Tx. A sharp dose fall off with gradient index value of 3.4 ± 0.27 for 4 mm Varian conical collimator while 4.17 ± 0.20 with BrainLab cone. Among the 5 patients treated with a 4 mm cone, average maximum brainstem dose was 10.24 Gy for Edge using 6X FFF and 14.28 Gy for Novalis Tx using 6X SRS beam. Conclusion: The use of FFF beams improves delivery efficiency and conical collimator reduces dose to OAR’s for TN radiosurgery. Further investigation is warranted with larger sample patient data.

목차

ABSTRACT
 Introduction
 Materials and Methods
 Results
 Discussion
 Conclusion
 References

키워드

Trigeminal Neuralgia Conical collimator Flattening filter free Brainstem

저자

  • Vaibhav R Mhatre [ Department of Radiation Oncology and Neurosurgery, Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Mumbai, India ] Corresponding author
  • Pranav Chadha [ Department of Radiation Oncology and Neurosurgery, Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Mumbai, India ]
  • Abhaya P Kumar [ Department of Radiation Oncology and Neurosurgery, Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Mumbai, India ]
  • Kaustav Talapatra [ Department of Radiation Oncology and Neurosurgery, Kokilaben Dhirubhai Ambani Hospital and Medical Research Institute, Mumbai, India ]

참고문헌

자료제공 : 네이버학술정보

간행물 정보

발행기관

  • 발행기관명
    대한방사선방어학회 [Korean Association For Radiation Protection]
  • 설립연도
    1975
  • 분야
    자연과학>기타자연과학
  • 소개
    회원 상호간의 협조와 친목을 도모함으로써 방사선방어에 관한 제반연구 및 발전에 이바지함을 물론 학술의 국제교류 및 국제학술단체와의 상호협력 증진에 기여함을 목적으로 하며, 이 목적을 달성하기 위하여 다음 각 호의 사업을 한다. 1. 방사선방어에 관한 학술연구발표회 및 강연회 등의 개최 2. 학회지 및 방사선방어에 관한 학술간행물의 발행 및 배포 3. 방사선방어에 관한 학술의 국제교류 및 협력 4. 방사선방어에 관한 국제학술자료의 조사, 수집 및 번역 5. 방사선방어에 관한 조사 및 연구용역 6. 회원의 연구활동을 위한 제반협조 7. 기타 본 학회의 목적 달성에 필요한 사항

간행물

  • 간행물명
    방사선방어학회지 [Journal of Radiation Protection and Research]
  • 간기
    계간
  • pISSN
    2508-1888
  • 수록기간
    1976~2026
  • 등재여부
    KCI 등재,SCOPUS
  • 십진분류
    KDC 559 DDC 629

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