LUER-20M
LINEAR ELECTRON ACCELERATOR FOR RADIOTHERAPY
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The LUER-20M medical linear electron accelerator is isocentric megavoltage radiotherapy equipment intended for distant radiotherapy by photon and electron beams in both static and rotary modes.
The accelerator is recommended for use in specialized oncological clinics. It may be also used for research purposes in medicine and biology.
The LUER-20M may be used for treatment of not only oncological patients when it is completed with hardware environment complex for stereotactic radiotherapy of intracranial small size pathologic and small objects by photon narrow beam.
RADIATION PARAMETERS
| X-ray | |
| Boundary photon energy, MeV | 6 and 18 |
| Average absorbed dose rate | |
| - 6 MeV photon energy | 2 |
| - 18 MeV photon energy | 3 |
| Normal treatment distance (NTD), m | 1±0.005 |
| Rectangular irradiation field size range (at NTD), sm | 2x2 - 40x40 |
| Electrons | |
| Electron energy, MeV | 5; 8; 11; 14; 17; 20 |
| Average absorbed dose rate | 5 |
| Normal treatment distance, m | 1±0.005 |
| Rectangular irradiation field size range (at NTD), sm | 4x4 - 26x26 |
UTILITIES AND EQUIPMENT
| Geometrical and mechanical parameters | |
| Gantry rotation angle | ±180° |
| Rotation angular velocity, °/min | 120 and 240 |
| Isocentre plane-to-floor distance, sm, no more | 130 |
| Radiation head diaphragmatic system turn angle | ±90° |
| Isocentre deviation with gantry rotation, mm | ±1 |
| Utilities | |
| Maximum mains power consumed by the accelerator facility (3x380/220 V, 50 Hz), kW | 45 |
| Water flow rate in the outer cooling loop, m³/s | 3 |
| Water temperature in the outer cooling loop, °C, no more | 25 |
| Equipment | LxWxH, mm | Weight, kg |
| Irradiator | 2855x1250x2855 | 6400 |
| Microwave generator | 814x1020x2030 | 700 |
| Klystron modulator | 814x1020x2030 | 890 |
| Control cabinet | 564x650x2030 | 180 |
| Interface rack | 564x500x2030 | 150 |
| Water cooler | 1055x1075x900 | 425 |
| Treatment control terminal | 530x430x270 | 21 |
The irradiator and microwave generator are located in treatment room fitted with the radiation protection shielding and maze passage. The room must be about 50 m2 in area and at least 3.5 m. The rest of equipment is distributed over the rooms with the total area about 30 m2.
The accelerator is both manually and PC computer controlled. The control system provides the accelerator start-up, setting, control and monitoring of many parameters e.g. irradiation mode, electron energy, dose rate and total dose, gantry rotation angle and speed, gantry position, irradiation field size, etc.
