QUALITY ASSURANCE

 

RAVEN

THE INDEPENDENT ALL-IN-ONE QA DEVICE FOR YOUR DAILY, MONTHLY AND ANNUAL LINAC QA

One device measures, verifies and records your LINAC’s optical, mechanical, and radiation parameters.

  • Save time: Automated sequencing with reduced set up
  • Be precise: Sub millimeter precision, 0.25 mm resolution
  • Be confident: Independent and TG-142 compliant
  • Keep it simple: one device for more than 50 % of your QA tasks

RAVEN's unique ability to capture both optical and radiation parameters provides your clinic with the most comprehensive time saving QA device on the market today.

Developed by JPLC Associates LLC

US Patent # 9,211,101
FDA listed
CE mark pending

Screenshots

MLC Picket Fence
Radiation QA


 

MECHANICAL AND RADIATION MEASUREMENTS FOR LINEAR ACCELERATORS

DAILY QA*

Dosimetry

  • x-ray output constancy
  • electron output constancy

Mechanical

  • laser localization
  • optical distance indicatior (ODI) @ iso
  • collimator size indicator

MLC

  • qualitative test (i. e. matched segments, aka “picket fence”)

Wedges

  • morning check-out run for one angle

MONTHLY QA*

Dosimetry

  • x-ray output constancy
  • electron output constancy
  • photon beam profile constancy
  • photon beam energy constancy
  • electron beam profile constancy
  • electron beam energy constancy
  • dose rate output constancy

Mechanical

  • light / radiation field coincidence
  • distance check device for lasers compared with front pointer
  • gantry / collimator angle indicators
  • accessory trays
  • jaw position indicators (symmetric)
  • cross-hair centering (walkout)
  • treatment couch position indicators
  • wedge placement accuracy
  • compensator placement accuracy
  • localizing lasers

MLC

  • setting vs radiation field for two patterns
  • travel speed
  • leaf position accuracy

Wedges

  • wedge factor for all energies

ANNUAL QA*

Dosimetry

  • x-ray flatness change from baseline
  • x-ray symmetry change from baseline
  • electron flatness change from baseline
  • electron symmetry change from baseline
  • x-ray / electron output calibration
  • spot check of field-size dependent output factors for x-ray
  • output factors for electron applicators
  • x-ray beam quality
  • electron beam quality
  • physical wedge transmission factor constancy
  • x-ray monitor unit linearity (output constancy)
  • electron monitor unit linearity (output constancy)
  • x-ray output constancy vs dose-rate
  • x-ray output constancy vs gantry angle
  • electron output constancy vs gantry angle
  • electron and x-ray off-axis factor constancy vs gantry angle
 

Mechanical

  • collimator rotation isocenter
  • gantry rotation isocenter
  • couch rotation isocenter
  • coincidence of radiation and mechanical isocenter
  • table top sag
  • table angle
  • table travel maximum range movement in all directions

MLC

  • MLC transmission
  • leaf position repeatability
  • MLC spoke shot
  • coincidence of light field and radiation field
  • segmental IMRT (step and shoot) test
  • moving window IMRT

Wedges

  • check of wedge angle for 60º, full field and spot check for intermediate angle, field size

* Based on: Eric E. Klein, et al, „Task Group 142 report: Quality assurance of medical accelerators”, Med. Phys. 36 (9), September 2009

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