This standard specifies the performance index and test methods of medical electron accelerators.
This standard applies to medical electron accelerators used for therapy the purpose in human medical practice.
This standard applies to medical electron accelerators which can generate X-radiation and electron radiation; its nominal energies is 1~50MeV, maximum dose rates is 0.001Gy s -1 ~ 1Gy s -1 at 1m from the radiation source, normal treatment distance (NTD) is 50cm ~ 200cm.
This standard applies to the medical electron accelerators equipped with isocentric gantry, and the performance characteristics and test methods for non-isocentric equipment may be corrected properly.
Unless otherwise specified in the accompanying documents, this standard applies to the equipment installed and used in the environment under the following conditions:
a. Temperature 15~35℃
b. Relative humidity 30%~75%
c. Atmospheric pressure 7×104~11×101Pa (700~1100mbar)
The transportation and storage environmental conditions must be stated in the accompanying documents.
Power supply must meet the requirements of 1.4 b.2) in GB 9706.1.
Power supply must have sufficiently low internal impedance to prevent the on-load and no-load voltage fluctuations exceeding ±5%.
Note: NTD is the abbreviation of normal treatment distance in English, the same in the following text.
