KR702A type radiotherapy two-dimensional automatic scanning water tank system

　　The radiotherapy three-dimensional water tank system adopts automated measurement and control technology, which can quickly, conveniently and accurately scan and measure the beam parameters of various types of medical linear accelerators, X-knife and cobalt 60 long-distance treatment machines. The computer controls the multi-subdivision stepper motor to drive the precision mechanical transmission system, so that the scanning positioning accuracy of the system is less than 0.1mm; it can scan the horizontal and vertical directions of the radiotherapy beam, and quickly measure parameters such as the off-axis ratio and percentage depth of the radiotherapy field. The system's "ray beam analysis system software package" is fully functional. The program designed according to national standards can automatically collect and analyze data, display measured graphics and calculate various important parameters; it can automatically display measured data and scanning curves in a timely manner, and can also store and output detected graphics and data.

 

　　The radiotherapy three-dimensional water tank is suitable for the acceptance and post-maintenance inspection of radiotherapy equipment by hospital radiotherapy departments and provincial radiological health testing institutions. It can also achieve rapid measurement of a large number of clinical physical parameters required by the radiotherapy planning system.
 

　　1. Overview of the device
 

　　The radiotherapy automatic scanning water tank system adopts automated measurement and control technology, which can quickly, conveniently and accurately scan and measure the radiation field dose distribution parameters of X-rays and electron beams of various types of medical linear accelerators. It can also measure the beam parameters of MM50 cyclotron, X-knife and 60Co long-distance treatment machine.
 

　　In order to adapt to the requirements of more institutions and customers, our company's two-dimensional automatic scanning water tanks are divided into three types: DSR02B stroke X420mm z350mm DSR02A stroke X300mm z300mm, DSR02 stroke
 

　　2.Precision mechanical structure
 

　　By using a precision mechanical transmission system and a multi-subdivision stepper motor, the system's scanning positioning accuracy is better than 0.1mm.
 

　　Automatic scanning system: multi-segment stepper motor stainless steel guide rail and slider.
 

　　3. Professional analysis system software
 

　　The system's "Beam Analysis System Software Package" is fully functional and can collect, analyze, automatically display measured graphics and calculate various important parameters. It can also convert data into format files required by the radiotherapy planning system. It can adjust the measurement speed, can continuously measure 10 layers of Profile, can scan PPD off-center, and can smooth the measurement curve.
 

　　4.Water tank specifications
 

　　It can quickly measure the percent depth dose curve of the radiotherapy beam, and use special software to convert the PDD table into a TMR table.
 

　　Water tank outer dimensions:
 

　　Small 2D DSR02 water tank: 440×370×360mm
 

　　Medium two-dimensional DSR02A water tank: 500×400×392mm
 

　　Large two-dimensional DSR02B water tank: 625×425×400mm
 

　　6.Main measuring accessories
 

　　System configuration: (Note: Main configuration)
 

　　Multi-subdivision stepper motor
 

　　Stainless steel rails and slides
 

　　Host, including dual-channel dosimeter and dual-channel stepper motor controller
 

　　2 pairs of special sensors and one special water pipe
 

　　Ionization chamber waterproof probe
 

　　Dedicated laptop
 

　　Professional software
 

　　7.Technical parameters:
 

　　PMMA water tank wall thickness: 12mm
 

　　The two-dimensional scanning mechanical structure is a cantilever type
 

　　Scanning accuracy: <0.1mm
 

　　Scanning speed: Measurement of 40cm range can be completed within 40s
 

　　Scanning method: multi-point continuous scanning
 

　　Dual-channel electrometer time constant: <10ms
 

　　8. Energy range:
 

　　Photon: co-60 4--50MeV
 

　　Electronic wire: 4-50MeV
 

　　Power supply: AC 220V±10%.
 

　　9. Function:
 

　　Vertical PDD and OAR measurement capabilities
 

　　Diagonal scan (Profile) measurement function
 

　　Off-center vertical scan PDD measurement function
 

　　Continuous 10-layer horizontal scanning (Profile) measurement function
 

　　Horizontal scan (Profile) measurement function
 

　　Can be converted into the format required by TPS, and PDD can be converted into TMR table
 

　　10. Precautions for using the three-dimensional radiotherapy water tank:
 

　　Since the water tank and vertical scanning arm are often soaked in water, they must be cleaned regularly. After use, the scanning arm must be wiped dry and lubricated on the gears and guide shafts, and then placed in a special storage box for storage.
 

　　The ionization chamber, control box and various connecting cables should be dust-proof and moisture-proof to avoid leakage and drift. They should be placed in a dry box for proper storage after each use, and the connecting cables should not be excessively folded and coiled to avoid affecting their service life.
 

　　The movement accuracy and smoothness of the scanning arm must be regularly calibrated and reviewed to ensure that its movement accuracy is reliable and stable.