Request Quote

Penta-Guide QA Phantom Key Features
  • Enables daily testing to ensure on-board imaging targeting accuracy
  • Contains low-density rings and hollow spheres to minimize high-density artifacts
  • Includes FREE image analysis software to simplify CBCT QA testing
  • Apply simple Pass / Fail acceptance criteria
  • Testing does not infringe upon patient treatment time
  • Light field alignment 4x4; 10x10; 12x12
  • 16 cm cube -5kg
  • 1/4 mm accuracy

Perform true spatial alignment and coincidence tests on IGRT systems

The QUASAR™ Penta-Guide Phantom is used for the commissioning and daily testing of Image-Guided Radiotherapy (IGRT) systems. The QUASAR™ Penta-Guide Phantom ensures the accuracy of linac-mounted image guidance systems, including cone beam CT (CBCT), x-ray volumetric imaging (XVI) and on-board imaging (OBI).

Minimize imaging artifacts by making use of the Penta-Guide's low-density objects to allow for rapid and easy daily testing of:
  • 3D cone beam registration
  • kV and MV system coincidence
  • kV and MV projection images
  • Laser and light field coincidence
  • Remote table adjustments

Image Analysis Software

Penta-Guide 3D Monitor
QUASAR™ Penta-Guide QA Software is designed to simplify and enhance daily cone beam CT QA through automated image analysis. This time-saving application automates the analysis and reporting for kV-MV projection images as well as 3D cone beam CT images.

Arrow Learn more about Penta-Guide QA Software

Daily Testing

Used by a therapist every morning, testing takes little or no extra time and can be completed during normal daily equipment warm-up procedures.

Penta-Guide  Lehmann Yoke

Simultaneous Testing

Ideally, one QUASAR™ Penta-Guide Phantom should be used per linac allowing simultaneous system testing and preventing unnecessary start-up delays.

Penta-Guide with Lehmann Yoke


Penta-Guide with Frameless Array

Lehmann Yoke

The QUASAR™ Penta-Guide Phantom also comes with a Lehmann Yoke for confirmation of the source to surface distance (SSD). A protocol outlining this enhanced testing procedure is included with the User’s Guide.
(Photo provided by Joerg Lehmann)


Optional Hood

An optional Hood is used to confirm that the Varian Frameless Array or other visual position indicator is aligned with the CBCT and OBI.




Process Flow youtube published
View the Photo Gallery
Access a collection of photos from our events.
Watch the Product Video
Check out our product overview and demo videos on YouTube.
Read the Facts and Figures
Obtain a list of references and published research papers.
downloadable files Specifications Locked Files
Product Data Sheet 
Download brochure to learn more about the features and components.

Product Specifications
Click to learn more about the product specifications and ordering information.

User's Guide
Login to view and download the user's guide.