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GB 15213-1994 PDF in English


GB 15213-1994 (GB15213-1994) PDF English
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GB 15213-1994: PDF in English

GB 15213-94 (GB 15213-1994)
GB
UDC 615.47; 621.3.038.624
F 91
NATIONAL STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
GB 15213-94
Medical Electron Accelerators – Functional
Performance Characteristics and Test Methods
ISSUED ON. SEPTEMBER 24, 1994
IMPLEMENTED ON. MARCH 01, 1995
Issued by. State Bureau of Technical Supervision the People's Republic
of China
Table of Contents
1  Subject content and scope of application ... 3 
2  Terms and references ... 4 
2.1  Terms ... 4 
2.2  References ... 4 
3  Performance indexes ... 4 
3.1  Dose monitoring system ... 4 
3.2  Depth absorbed dose characteristics ... 7 
3.3  Flatness of radiation field ... 9 
4  Test methods ... 17 
4.1  Standardized test conditions ... 17 
4.1.1  Angular position ... 17 
4.1.2  Materials and position of phantom ... 18 
4.1.3  Position of testing point ... 18 
4.1.4  Radiation detector ... 18 
4.1.5   Standard testing depth ... 19 
4.1.6  Radiation field ... 19 
4.1.7  Adjustment during the test ... 19 
4.2  Dose monitoring system ... 19 
4.3  Depth absorbed dose characteristics ... 25 
4.4  Uniformity of radiation field ... 28 
4.5  Indication of radiation fields ... 33 
4.6  Indication of radiation beam axis ... 37 
4.7  Isocentre ... 39 
4.8  Indication of distance along the radiation beam axis ... 40 
4.9  Zero position of rotational scales ... 41 
4.10  Congruence of opposed radiation fields ... 43 
4.11  Movements of the patient table ... 43 
Additional Information ... 54 
National Standard of the People’s Republic of China
Medical Electron Accelerators – Functional Performance
Characteristics and Test Methods
GB 15213-94
This standard equivalently adopts the international standard IEC 976 (1989) Medical
Electron Accelerators - Functional Performance Characteristics and IEC977 (1989)
Medical electron accelerators in the range 1 MeV to 50 MeV -Guidelines for functional
performance characteristics.
1 Subject content and scope of application
This standard specifies the performance index and test methods of medical electron
accelerators.
This standard applies to medical electron accelerators used for therapy 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
~ 1Gy/s 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°C
b. Relative humidity 30%~75%
c. Atmospheric pressure 7×104~11×104Pa (700~1100mbar)
The transportation and storage environmental conditions must be stated in the
Additional Information
This standard was proposed by State Pharmaceutical Administration and shall be under
the jurisdiction of Beijing Medical Equipment Institute.
This standard was drafted by Beijing Medical Equipment Institute.
Chief drafting staffs of this standard are Zhang Zhaoyuan, Wu Wei, and Wang Xiaoyun.
Since the implementation date of this Standard, ZB F91 002-88 "Medical Electron
Accelerators-Functional Performance Characteristics and Test Methods" issued by State
Pharmaceutical Administration shall be abolished.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.