This Report was prepared through a joint effort of NCRP Scien-tific Committee 46-13 on Design of Facilities for Medical Radiation Therapy and the American Association of Physicists in Medicine (AAPM). NCRP gratefully acknowledges the support of AAPM for several of its members to serve on Scientific Committee 46-13 and

AAPM has contracted with NCRP to provide each AAPM Member in good standing access and download privileges of electronically available NCRP reports, commentaries and statements. This report was prepared by the National Council on Radiation Protection and Measurements (NCRP).

2015年6月1日 · NCRP Report No. 151, Structural Shielding Design and Evaluation from Megavoltage X- and Gamma-Ray Radiotherapy Facilities, presents recommendations and technical information related to the design and installation of structural shielding.

2017年2月12日 · ncrp报告第151号 级兆伏级x和γ射线放射医疗设备结构屏蔽设计与评估（仅作内部参考）辐射保护与测量美国国家委员会推荐005年1月31日

In this Report, shielding design goals (P) are levels of dose equivalent (H) used in the design calculations and evaluation of barriers constructed for the protection of workers or members of the public.

Hence recent designs have had to refer to NCRP Report No. 51 (NCRP, 1977) and NCRP Report No. 79 (NCRP, 1984) in order to account for the higher accelerating voltages and the concomitant production of neutrons. In addition, the use of barriers constructed with composite materials has become commonplace.

NCRP-151 provides the standard formalism used in the United States to determine shielding requirements for megavoltage photon and electron beam sources. Shielding requirements are based on the intended use of the shielded area, the expected occupancy of the area, the fraction of time the beam will be directed at the barrier, and the total ...

In addition to conventional radiotherapy, the Report covers the newer modalities such as total-body irradiation, intensity modulated radiation therapy, stereotactic radiosurgery, stereotactic radiotherapy, and intraoperative radiotherapy.

2019年2月3日 · NCRP 报告 第 151 号 子源的治疗室）外侧屏蔽设计物理量时，用一个经过定标的仪器测得的结果（伦琴，R） 除以 114，得到空气中 Ka （单位：Gy），或者除以 104 而得到可接受的吸收剂量（Gy） 近似值或者是某一组织某一点的剂量当量（Sv ）的近似值。

Overview, Basis & Revision of NCRP Report 151 Structural Shielding Design and Evaluation for Megavoltage x- and Gamma-ray Radiotherapy Facilities Hoang T. Vu, MS, PhD Candidate Department of Medical Radiation Physics College of Health Professions Rosalind Franklin University of Medicine and Sciences North Chicago, IL 60064