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Radiological Imaging Technology

Machine QA MLC QA Patient QA Imaging QA

Machine QA


Automated QA for helical tomotherapy 

RIT is your best source for the tests specified for helical tomotherapy in the TG-148 report. These automated QA tests include:

  • Y-jaw divergence/beam centering
  • Y-jaw/gantry rotation plane alignment
  • Gantry angle consistency
  • Treatment field centering
  • Couch translation/gantry rotation
  • Interrupted Treatment
  • MLC alignment test
  • Laser localization
  • Built in RITtrend reporting and trending

Image Quality Tests (Cheese Phantom)

  • CT Number to Density
  • Uniformity
  • Resolution
  • Contrast
  • Noise
  • Geometric Accuracy (New in V6.6)


For Robotic Radiosurgery

These automated Machine QA tests include:

  • End-to-End test:
    • Fully automated for the Ball Cube 2 phantom – no film flipping or mirroring needed
    • Ball Cube phantom
    • Mini Ball Cube phantom
  • AQA test
  • Laser coincidence test
  • IRIS and fixed collimator tests
  • MLC tests


The Single Vendor Solution That Performs or Trends EVERY TG-142 Test


RIT for TG-142 enables you to use your EPID for many machine tests with confidence and ease.  In addition, imaging QA phantoms are automatically scored with easy to use tracking and trending functions.




  • IGRT Daily QA
  • CBCT imaging for OBI and XVI
  • Planar kV Imaging
  • Planar MV (EPID) Imaging
  • MLC accuracy
  • Enhanced Stereotactic (Winston-Lutz)
  • Radiation vs. Light Field
    - regular
    - asymmetrical
  • Beam profiles / Flatness / Symmetry
  • Starshots and more

3D Winston-Lutz

RIT’s new 3D EPID based Stereotactic alignment routine automatically processes a set of Winston-Lutz images to give a fast, accurate measurement of isocenter position. RIT’s version of this classic test allows you to use 3-12 images and provides an error estimate to determine the wobble around the isocenter. Results are easy to interpret and can be done with any field shape, size, and any ball bearing phantom.

Patents: US 9192784, JP 6009705, and CA 2918045. Other international patents pending.

Radiation vs. Light Field

This routine measures how well radiation and light field positions coincide for conformance with TG-142 recommendations. The routine can be used with a variety of phantoms including the RIT L-Rad phantom. The routine can make use of EPID images of the radiation field and can adapt to a variety of SIDs, asymmetric and custom field sizes. Besides radiation- light field coincidence the routine measures field symmetry and flatness, penumbra width, and field edge orthogonality in vertical and horizontal directions.

Star Shot

This classic routine measures the mechanical alignment of the gantry, the collimators, and the table. It automatically finds the starshot beam centers and edges to calculate misalignment using a variety of measures. EPID images of several spokes can be easily combined to analyze star patterns with the built-in Image Compositor tool.

Beam Measurements

RIT Software makes a variety of beam-related measurements easy, and supports the widest variety of image formats including EPID, film, and CR.


Functions include:

  • Beam orthogonal profiles including FWHM, penumbras, flatness and symmetry
  • Beam depth profiles including PDD for photons and Electron energy
  • Isodose measurements
  • Asymmetric beam alignment tests
  • Various histograms and 3D dose profiles
  • Import of water tank data for comparison

RIT Products with Machine QA

All of RIT’s therapy products
in one convenient and
comprehensive package

The original RIT product
combining patient and
machine QA

All of the machine and
imaging tests for TG-142 in a
“just what you need” package

A comprehensive test suite
for helical tomotherapy

A comprehensive
test suite for robotic

Full suite of film dosimetry
routines including patient and
basic machine QA


Basic film analysis package