Elekta Precise Treatment System
Elekta · Model Precise Treatment System
Precise Treatment System provides a complete range of service and diagnostic tools to ensure optimal system uptime. Wide choice of energy levels to match treatment needs. Choice of fully integrated MLCi or Beam Modulator. Open system for future expansion. Excellent access for electron and non-coplanar techniques. Elekta Intellimax ready.
Typical Failure Modes
Compiled for this model from its own documentation and established engineering knowledge for this equipment class - not from a verified service record. Confirm against the manufacturer's service manual.
Magnetron / RF output instability
HighSymptoms: Beam-on faults, dose-rate low or unstable, RF/HV or arc interlocks.
Root cause: Magnetron or thyratron at end of life, HV supply, or waveguide arcing / SF6 pressure loss.
MLC leaf fault
HighSymptoms: Leaf stuck or out of position, delivery interlock, QA fluence errors.
Root cause: MLCi / Agility leaf motor, leaf-guide wear, or a leaf position-readout fault.
Gantry / collimator / diaphragm drive fault
MediumSymptoms: Rotation or field-size error, position interlock.
Root cause: Drive motor, encoder, or brake on the gantry or collimator.
Portal / MV imaging fault (iView)
MediumSymptoms: Poor or no MV portal image for verification.
Root cause: MV imager panel or its retractable arm.
Dosimetry / ion-chamber drift
HighSymptoms: Output constancy checks trend out, symmetry/flatness off, chamber interlock.
Root cause: Monitor ion-chamber aging or a dose-servo fault.
Water / thermal management fault
MediumSymptoms: Over-temperature interlocks, dose-rate instability, coolant-flow alarm.
Root cause: Chiller pump, heat-exchanger fouling, or low coolant.
Serviceable Parts & Consumables
Serviceable items for this model, compiled from its documentation and engineering knowledge for this equipment class. Service class and relative cost are estimates, not manufacturer figures; no part numbers are given. Confirm intervals and pricing against the manufacturer.
Magnetron
OEM service; dosimetry re-commissioning required.
Class Periodic replacementRel. cost $$$$R&R Expert-level
Thyratron
Class Periodic replacementRel. cost $$$$R&R Expert-level
MLC leaf motor / drive assembly
Class Major service partRel. cost $$$$R&R Expert-level
MV portal imager panel
Class Major service partRel. cost $$$$R&R Difficult
Monitor ion chamber
Class Major service partRel. cost $$$$R&R Expert-level
Chiller pump / heat exchanger
Class Major service partRel. cost $$$R&R Difficult
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Magnetron OEM service; dosimetry re-commissioning required. | Periodic replacement | $$$$ | Expert-level |
| Thyratron | Periodic replacement | $$$$ | Expert-level |
| MLC leaf motor / drive assembly | Major service part | $$$$ | Expert-level |
| MV portal imager panel | Major service part | $$$$ | Difficult |
| Monitor ion chamber | Major service part | $$$$ | Expert-level |
| Chiller pump / heat exchanger | Major service part | $$$ | Difficult |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
Troubleshooting Approach
A starting sequence for this model, compiled from its documentation and engineering knowledge for this equipment class. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Beam-on / RF fault
- This is an OEM-service linac - the BMET role is triage and coordination.
- Record the exact fault codes from the console and the modulator / equipment-room logs.
- Check chiller status and coolant flow first - thermal faults mimic RF faults.
- Verify SF6 / waveguide pressure.
- Escalate a confirmed magnetron / thyratron / waveguide fault to Elekta; keep the unit down until physics re-verifies output.
Symptom: MLC or field-size interlock
- Note the leaf / diaphragm and the exact interlock.
- Review the daily QA and delivery-log trend.
- Run the MLC calibration / diagnostic where the procedures allow.
- Escalate a confirmed leaf-drive or readout fault to Elekta.
- Coordinate with physics before resuming clinical use.