An impressive range of products

Radiological Imaging Technology

Machine QA MLC QA Patient QA Imaging QA

Machine QA


3D Winston-Lutz (Isocenter Optimization)

Now with accuracy surpassing sub-pixel resolution!

The RIT Family of Products come equipped with an automated 3D Stereotactic Alignment routine to give you a fast and accurate measurement of isocenter accuracy, allowing you to optimize your SRS/SBRT delivery. Using only a set of EPID Winston-Lutz images, the RIT system will calculate deviations between radiation and mechanical isocenter, determine ball/BB setup error, and suggest couch alignment adjustments to optimize your system’s accuracy. Additionally, this routine enables individual component (gantry, collimator, couch) characterization to better understand distinct contributions to isocenter deviation, giving insight into adjustments that can be made to improve delivery performance, if needed.

RIT's Isocenter Optimization routine allows for optimal cone detection, resulting in the utmost precision.

Eliminate your need for films and increase your accuracy using Virtual Star Shot* with ANY combination of angles, reconstructed using a set of Winston-Lutz images in it’s dedicated window! Patents: US 9192784, JP 6009705, CA 2918045, and other international patents pending.



Recently-Added Enhancements:

  • Newly-Added Clinical Angles
    Automatically process a range of 3 to 16 EPID Winston-Lutz images for fast, sub-pixel level accuracy of isocenter position. This test allows physicists to perform daily or patient-specific analyses using specific clinical treatment angles, with a ball setup error reported for each test.
  • Detailed PDF Report Customization
    Customize your exported PDF reports, choosing to include or exclude plot and table data such as axis projection details, angle configurations, and optimization results, among others.
  • Enhanced Axis Projection Table Display
    For added convenience, the axis projection detail window now displays the data table, allowing you to quickly and easily reference your measurements.



The single-vendor solution that performs or trends every test recommended in TG-142

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
  • Enhanced 3D Stereotactic (Winston-Lutz) with Virtual Star Shot, optimizing SRS/SBRT delivery (US Patent 9192784, JP Patent 6009705, CA Patent 2918045 and other International Patents pending)
  • MLC accuracy
  • Radiation vs. Light Field (Regular and Asymmetrical)
    This Radiation vs. Light Field 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.
  • Classic Star Shot Analysis
  • Beam profiles / Flatness / Symmetry and more

Fully-Automated Star Shot Analysis

RIT’s film Star Shot beam detection routine has been completely re-designed and now features a fully-automated interface with more robust and accurate detection algorithms. A few key highlights include:

  • Full Automation: Increase your efficiency and accuracy with RIT's one-click analysis of Star Shot images. The new algorithm removes pre-processing from your workflow, allowing for quicker acquisition of results. Polarity, ROI, number of spokes, and spoke center are all automatically extracted from the image, then applied in the analysis.
  • Visualized Spoke Detection: Newly-added beam center overlays on the beam profile plots provide a clear indication of the automated routine’s performance.
  • Artificial Intelligence: The re-designed routine utilizes sophisticated AI algorithms for even more accurate and reliable measurements. The AI obtains a 99% accuracy rate of spoke detection in a wide range of Star Shot images.
  • Manual Override Option: If desired, the routine will also allow you to easily modify the settings to fine-tune the automated analysis by hand.

Automated Star Shot Analysis

RIT EPID Phantom Tests (24X24cm)

  • Constancy in 5 areas
  • Resolution (MTF)
  • Geometric Distortion
  • Uniformity
  • Contrast
  • Noise

For users requiring both Machine & Patient QA, try 


RITG135: One Software Product for All CyberKnife Machine QA


Assembled to coincide with recommended QA tasks outlined within TG-135, RITG135 is a new, dedicated software package for all CyberKnife® Machine QA. These automated routines and analyses ensure rapid results, without compromising measurement precision.




RITG135 includes analyses for the End-to-End, AQA, Iris, Laser Coincidence, and M6 MLC Tests. Designed to simplify and enhance current methods for performing these routine tasks, RITG135 provides a user-friendly interface with minimal user interaction, reducing the likelihood of errors and ensuring reproducible measurement templates. Automated film detection algorithms eliminate the need for manual manipulation or alignment of images, significantly reducing the time needed to perform these tests. Easily create PDF reports for either individual or combined routines, and export to our RITtrend database for simple tracking and trending of results over time.



Fully-Automated Machine QA Tests

  • End-to-End Test:
    • Ball Cube 2 phantom (Fully-automated; No film flipping or mirroring needed)
    • Ball Cube phantom
    • Mini Ball Cube phantom
  • AQA Test
  • IRIS Test
  • Laser Coincidence Test
  • Fully-Automated M6 MLC Test

Built-In Features

  • RITtrend™ statistical database for reporting and trending
  • PDF reports for every analysis routine

CyberKnife® is a registered trademark of Accuray, Inc.



The Best Source for Helical TomoTherapy® and Radixact® QA



RITG148+ is a precise, state-of-the-art, and comprehensive software built to perform all machine and imaging QA analyses for helical TomoTherapy®. Designed with the TG-148 report in mind, RITG148+ analyzes the standardized tests, including Static & Rotational Output Consistency, Jaw Centering & Alignment, Overhead Laser Positioning, Interrupted Treatment, and all others recommended for daily, monthly, and annual QA. RITG148+ also analyzes image quality, using the Tomotherapy Cheese phantom.

RITG148+ software's combination of powerful, robust routines in a user-friendly interface maximize the efficiency and precision of all measurements. For added convenience, users can easily create PDF reports for all routines, as well as export their data to the RITtrend database for large-scale analysis over time.

RITG148+ Software
Image courtesy of Accuray  |  ©2017 Accuray Incorporated.  |  All Rights Reserved.


Automated QA Tests

  • Y-jaw divergence/beam centering
  • Y-jaw/gantry rotation plane alignment
  • Couch translation/gantry rotation
  • Gantry angle consistency
  • Treatment field centering
  • Interrupted treatment
  • MLC alignment test
  • Laser localization

Image Quality Tests

  • CT Number to Density
  • Uniformity
  • Resolution
  • Contrast
  • Noise
  • Geometric Accuracy
  • Geometric Distortion
  • Crop images with Pin Prick, Erase and ROI tool

Built-In Features

  • RITtrend™ statistical database for reporting and trending

  • PDF reports for every analysis routine

For users requiring both Machine & Patient QA, try 

TomoTherapy® and Radixact® are registered trademarks of Accuray, Inc.

Other Machine QA

RIT software makes a variety of Machine QA measurements easy, and supports the widest variety of image formats including EPID, film, and CR.

Machine QA routines include:

  • Isodose Lines
  • Asymmetric Field Matching
  • Beam depth profiles, including PDD for photons and Electron Energy
  • Various histograms and 3D dose profiles
  • Importing water tank data for comparison
  • Beam orthogonal profiles including FWHM, penumbras, flatness and symmetry
  • Gibbs Cone Analysis (Pictured)
    This routine measures the cone wobble when using a single cone (repeated), or cone center shift when using multiple cones. This provides an accurate test of either the cone wobble, collimator walkout (if the collimator is rotated during the test), or both.



Gibbs Cone Analysis


RIT Products For Machine QA Solutions

Product Description:
All of RIT's therapy products in one convenient and comprehensive package.
Quality Assurance:
Patient QA, Machine QA, MLC QA, Imaging QA
The ideal software package for:
Medical physicists that perform various types of QA/QC measurements on a variety of machines, including both linear accelerators and imaging devices.
Product Description:
The original RIT product package that combines Machine QA (including MLC QA) and Patient QA.
Quality Assurance:
Patient QA, Machine QA, MLC QA
The ideal software package for:
Medical physicists that require a single QA software solution for their linear accelerator(s) and for intensity-modulated radiation therapy (IMRT) procedures.
Product Description:
A package specifically-designed to perform every imaging and machine QA test required in TG-142.
Quality Assurance:
Machine QA, MLC QA, Imaging QA
The ideal software package for:
Medical physicists that need to thoroughly and accurately complete daily, monthly, and annual QA on their linear accelerator(s).
Product Description:
A comprehensive test suite for helical TomoTherapy® machines, in accordance with TG-148.
Quality Assurance:
Machine QA, Imaging QA
The ideal software package for:
Medical physicists and/or centers that use only a TomoTherapy® or Radixact® machine, performing daily, monthly, and annual QA.
Product Description:
A comprehensive test suite for CyberKnife® and all robotic radiosurgery, in accordance with TG-135.
Quality Assurance:
Machine QA, MLC QA
The ideal software package for:
Medical physicists and/or centers that use a only a CyberKnife® machine, specifically one with an M6 MLC, performing daily, monthly, and annual QA.

Product Description:
RIT’s basic film analysis package for patient QA and partial machine QA measurements.
Quality Assurance:
Patient QA, Machine QA (Partial)
The ideal software package for:
Medical physicists that require a single software solution for film dosimetry and basic QA.