The Phantom Laboratory manufactures several Catphan® models which are used with radiation therapy CBCT systems.

Catphan® 606 For mV and kV CT

This phantom combines numerous kV test objects used in other Catphan® models, with large diameter slice geometry wires and a high signal MTF point source designed to compensate for the reduced contrast in MV images. By moving key image geometry and sensitometry tests near the center of the phantom, we reduce measurement variations caused by scatter in cone beam and large beam CT systems.

The Phantom Laboratory offers Smári, a web-based service for fully automated analysis of Catphan® Phantom images.

606 Test Sections:

  • CCT280: Geometry, Sensitometry and High Resolution Module

  • CTP730: Low Contrast Module

  • CTP729: Uniformity Module

For detailed phantom information please refer to the Catphan® 606 Datasheet.

Catphan® 604

The Catphan® 604 has been selected by Varian as an updated phantom to replace the Catphan® 504 phantom. The phantom started distribution in the second half of 2015. The Catphan® 604 phantom is distributed through Varian to assist in the commissioning and QA of the OBI  kV imager on its Linac systems. The Catphan® 604 phantom consists of 3 modules that cover all required CBCT imaging tests for TG142. 

To assist Catphan® 604 customers, The Phantom Laboratory offers Smári, a web-based service for fully automated analysis of Catphan® Phantom images.

604 Test-Summary

  • CTP732: Geometry, Sensitometry and High Resolution Module

  • CTP730: Low Contrast Module

  • CTP729: Uniformity Module

For detailed phantom information please refer to the Catphan® 604 Manual.

Catphan® 504

The Catphan® 504 phantom was distributed through Varian to assist in the commissioning and QA of the OBI kV imager on its Linac systems. The Catphan® 504 phantom consists of 4 modules that cover all required CBCT imaging tests for TG142. The Catphan® 504 phantom is no longer manufactured as of the fourth quarter of 2015. It has been replaced by the Catphan® 604 phantom (see below). 

To assist Catphan® 504 customers, The Phantom Laboratory offers Smári, a web-based service for fully automated analysis of Catphan® Phantom images.

504 Test modules:

  • CTP404: Geometry and Semsitometry Module

  • CTP528: High Resolution Module

  • CTP515: Low Contrast Module

  • CTP486: Uniformity Module

For detailed phantom information please refer to the Catphan® 504 Manual.

Catphan® 503

The Catphan® 503 phantom is distributed through Elekta to assist in the commissioning of the XVI kV imager on its Linac systems. The Catphan® 503 phantom consists of 3 modules that cover the Elekta 3D XVI customer acceptance tests and required CBCT TG-142 imaging tests .

To assist Catphan® 503 customers, The Phantom Laboratory offers Smári, a web-based service for fully automated analysis of Catphan® Phantom images.

503 Test Modules:

  • CTP404: Geometry and Sensitometry Module

  • CTP528: High resolution module

  • CTP486: Uniformity Module

For detailed phantom information please refer to the Catphan® 503 Manual.


Smári Image Analysis Service
The Catphan® 503, 504, and 604 are compatible with Smári, a powerful, web-based image analysis service created by The Phantom Laboratory. Smári delivers automated phantom image analysis in the cloud and maintains measurements in a database for trend analysis, machine comparisons, and historical records.