Elekta Versa Hd User Manual [patched] -

Review: Elekta Versa HD User Manual (v1.5 / current release)

Target Audience: Clinical users (RTTs), medical physicists, service engineers
Document ID: Elekta 4513370 81 01 (example)
Format: PDF, ~450 pages

5. Safety and Interlocks

• Primary interlocks: Door, beam-on permits, emergency stop, overcurrent/overtemperature.
• QA checks before treatment: Daily warm-up, output constancy, imaging and laser checks, patient ID verification.
• Radiation safety: Area signage, controlled-access procedures, personnel monitoring.

5.2 Calibrating the 6DoF Couch

The manual’s “iGUIDE” chapter describes the floor-standing 6DoF couch.

• Zeroing: After power-up, press “Zero All” – the couch will find its optical home sensors.
• Correction limits: Maximum pitch/roll correction is ±3°. If the patient setup requires >3°, reposition manually per manual Section 5.3.12.

Section 7: Frequently Asked Questions (FAQ) from the Manual

Let’s answer common queries directly sourced from the footnotes of the official user manual. elekta versa hd user manual

Q: Can I use the Versa HD for Total Body Irradiation (TBI)?

• Manual Answer: Yes, but only with the extended SSD (Source-to-Skin Distance) protocol, which requires removing the HexaPOD top and using a Perspex screen. See Appendix J, "TBI Configuration." Do not exceed 250 cm SSD.

Q: What is the maximum MU (Monitor Unit) setting per fraction? Review: Elekta Versa HD User Manual (v1

• Manual Answer: Software limited to 9999 MU per segment. However, the heat load capacity of the target is 600 MU/second continuous. The manual warns: "Exceeding 3000 MU per field without a 2-minute cooling gap will trigger a Target OverTemp interlock."

Q: How do I disable the interlock for a specific treatment?

• Manual Answer: You cannot. The Versa HD does not allow software override of hardware interlocks. If Interlock 105 (Door Safety) is active, the beam will not fire. The only "bypass" is for Service Mode, which requires a physical key.

Q: Where is the official errata for the Elekta Versa HD user manual? then press “Hardware Reset” (Section 8.7.2).

• Manual Answer: On page ii of every manual, a URL is printed: https://www.elekta.com/document-updates. As of the last revision, errata exists for the MLC leaf position calibration (Section 12.3) regarding temperature compensation.

3.1 Radiation Area Interlocks

• The Rule: Never bypass the door interlock. The manual states that disabling the door limit switch voids regulatory compliance (IEC 60601-2-1).
• Action in the manual: Always verify the “Door Closed” indicator is green on the pendant control before arcing.

Part 10: Training and Competency Verification

The user manual is also the foundation for competency checklists. Most clinics derive their annual therapist competency exam directly from the manual.

Example exam questions (based on Versa HD manual):

1. What is the maximum allowed MLC leaf transmission (interleaf leakage) according to the manual?
   • Answer: <0.01% (Section 1.3).
2. During a power outage, how long does the backup battery keep the integrity system alive?
   • Answer: 15 minutes (Section 8.2).
3. What is the procedure if the “Imager Electrical Interlock” activates?
   • Answer: Manually crank imager to parked position, then press “Hardware Reset” (Section 8.7.2).

5.1 Mounting the SRS Cone

Unlike standard linacs, the Versa HD uses a cone adapter that locks into the Agility head.

1. Step A (Manual p. 216): Remove the standard MLC housing cover using the hex key provided.
2. Step B: Slide the cone (5mm to 20mm) into the accessory tray slot #2 only. Slot #1 is for the imager.
3. Step C: Perform “Cone Check” – Diagnostic mode will measure transmission through the cone. Tolerance: <0.5% leakage.