Radiation Protection in the Design of Radiotherapy FacilitiesProvides practical guidance regarding the design and shielding of radiotherapy facilities. Methods for determining the necessary structural shielding for external beam units (cobalt-60 units, linear accelerators, superficial and orthovoltage units, and simulators), as well as for brachytherapy units, are described. |
Common terms and phrases
additional shielding average barrier thickness required brachytherapy capture gamma dose cm² D₁ design dose limit design limit determined from Eq distance dose output rate dose rate dsca duct Email equation Example gamma ray gantry rotation axis Gy-week-¹ head leakage IAEA IMRT inner maze point Ionizing Radiation isocentre lead leakage radiation linear accelerator maze door maze entrance maze wall measurements mSv/week NCRP neutron dose equivalent number of TVLs occupancy factor patient scatter photon primary barrier primary beam primary radiation public area radiation beam RADIATION PROTECTION radiation scattered radiation source radiotherapy facilities reflection coefficient required attenuation required barrier thickness Safety Standards scatter and leakage scatter fraction scattered radiation secondary barrier Section 6.3 shielding required structural shielding Sv-week-¹ Table TADR teletherapy treatment control area treatment room treatment unit TVLs required United Kingdom week¯¹ weekly dose X ray µSv-h¹