KR702B type radiotherapy two-dimensional water tank

Two-dimensional water tank and ray beam analysis system

The radiotherapy two-dimensional automatic scanning water tank system adopts automated measurement and control technology, which can quickly, conveniently and accurately scan and measure various types of medical linear accelerators,Beam parameters of X-knife and Cobalt 60 teletherapy machine. 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 two-dimensional automatic scanning 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 for automatically scanning water tanks in two dimensions

The radiotherapy automatic scanning water tank system adopts automated measurement and control technology, which can quickly, conveniently and accurately scan and measure various types of medical linear accelerators.The radiation field dose distribution parameters of X-rays and electron beams can also be measured for the beam parameters of the MM50 cyclotron, X-knife and 60Co remote 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 X300mm z250mm The water tank size and scanning size are also different.

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 than0.1mm。

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 toThe PDD table is converted into a TMR table.

Water tank outer dimensions:

small two-dimensionalDSR02 water tank: 440×370×360mm

Medium 2DDSR02A water tank: 500×400×392mm

big 2DDSR02B water tank: 625×425×400mm

6. Main measuring accessories

Multi-subdivision stepper motor

Stainless steel rails and slides

Host, including dual-channel dosimeter and dual-channel stepper motorcontroller

Dedicated sensor2 pairs of dedicated water pipes

Ionization chamber waterproof probe

Dedicated laptop

ProfessionalSoftware

7. Technical parameters:

PMMA water tank wall thickness: 12mm

The two-dimensional scanning mechanical structure is a cantilever type

Scanning accuracy:＜0.1mm

Scan speed:Measurement within 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: AC220V±10%。

9. Function:

vertical PDD and OAR measurement functions

diagonal scan(Profile) measurement function

Off-center vertical scanPDD measurement function

continuous10-layer horizontal scanning (Profile) measurement function

horizontal scan(Profile) measurement function

can be converted intoThe format required by TPS, PDD can be converted into TMR table

10. Notes:

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.