Catphan MV and kV Therapy Phantoms | Image Quality QA for CBCT

The Catphan MV and kV therapy series is a family of CT phantoms designed for cone-beam CT and megavoltage imaging systems used in image-guided radiotherapy. Models include the Catphan 503, 504, 604, and 606, each tailored to a specific linac or imaging platform. They combine kV test objects with large-diameter slice geometry wires and high-signal MTF point sources to compensate for lower contrast in MV images. 
 
Key Features:
Models suited to kV and MV CBCT and radiotherapy imaging systems
Large-diameter slice geometry wires for MV image visibility
High-signal MTF point source to offset reduced MV contrast
Key geometry and sensitometry tests placed near the center to reduce scatter-related variation in cone-beam systems
Low-contrast and spatial resolution modules for IGRT image quality
Uniformity module for noise and spatial uniformity testing
Smári web-based automated analysis available
 
Models:
Catphan 503: distributed through Elekta to support commissioning of the XVI kV imager
Catphan 504: selected by Varian Medical Systems for commissioning and QA of the OBI kV imager
Catphan 604: distributed through Varian for OBI kV imager commissioning and QA
Catphan 606: designed for MV and kV CT, with combined kV test objects and MV-optimized features
 
Applications:
Commissioning and QA of kV imagers on linear accelerators
Cone-beam CT image quality and CT number verification
MV CBCT and portal imaging quality assessment
Spatial resolution, low-contrast, and uniformity testing for IGRT
Geometric accuracy and alignment verification in image-guided treatment
 
Specifications:
Compatible systems: Varian OBI, Elekta XVI, and other kV and MV CBCT platforms
Test sections: low-contrast module (CTP730 in Catphan 606), high-resolution gauge, uniformity module, and sensitometry inserts
Analysis: Smári cloud-based software available
 
Manufactured by The Phantom Laboratory. Supplied by Meditronix Corporation in India.