1 Scope
This standard specifies the terms, definitions, requirements for functional performance characteristics and test methods of intensity-modulated radiation treatment planning system.
It is applicable to the intensity-modulated radiation treatment planning system (hereinafter referred to as the system) with high energy X-ray beam dose calculation function. The system is used to design the intensity-modulated radiation treatment plan for patients.
If the system has other planning and design functions using radiation treatment technologies besides intensity-modulated radiation treatment, it shall also meet the corresponding standards.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 9706.5 Medical electrical equipment - Part 2: Particular requirements for the safety of electron accelerators in the range 1MeV to 50MeV
GB 15213 Medical electron accelerators - Functional performance characteristics and test methods
GB/T 17857 Medical radiology - Terminology (Equipment for radiotherapy, nuclear medicine and radiation dosimetry)
YY 0637 Medical electrical equipment - Requirements for the safety of radiotherapy treatment planning systems
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 9706.5, GB 15213, GB/T 17857 and YY 0637 as well as the following apply.
3.1
intensity-modulated radiation therapy; IMRT
treatment method, by which the continuous or discrete mode predetermined in the treatment plan is usually adopted to adjust and control the photon or electron beam fluence, beam direction and field size relative to the patient
Note: The main function of IMRT is to improve the conformity of dose distribution to the planning target volume and minimize the dose for surrounding normal tissues.
3.2
target volume
volume of a patient to be irradiated with a certain absorbed dose during radiation therapy
3.3
clinical target volume; CTV
clinical focus (tumor volume), subclinical focus and possible invasion range of tumor given a certain dose according to a certain time and dose pattern
3.4
planning target volume; PTV
irradiated tissue range, including CTV itself and expanded range caused by the patient's organ movement, daily setup and changes of target volume position and volume changes of target volume during the treatment, etc., so as to ensure that CTV may get the prescribed therapeutic dose
3.5
prescription dose
therapeutic dose given to the target volume according to a certain time and dose division
3.6
organs at risk; OAR
important normal tissues or organs, whose radiosensitivity (tolerance dose) will significantly affect the design of treatment plan or the prescription dose of target volume
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements of functional performance characteristics
4.1 Accuracy of point dose calculation
4.2 Accuracy of dose distribution calculation
4.3 Target dose of treatment plan
5 Test method
5.1 Test conditions
5.2 Accuracy of point dose calculation
5.3 Accuracy of dose distribution calculation
5.4 Target dose of treatment plan
Annex A (Normative) Test cases
Annex B (Informative) Test data
Bibliography
