Head Scan Catphan CBCT Error

Hello, I’m having difficulties analyzing some of the head scans.

I’m linking a .zip file of the dicom images.

I get the error “Unable to locate CatPhan”. Any ideas why in this instance? Is it the ring artifact on the outside of the phantom?



Hi David

Please make sure the centres of the modules are within your scan range. You didn’t say which CatPhan you are using, but if you set up the CatPhan 604 with the side dots on the lasers then the centre of the Uniformity module will be +/- on your last slice and pylinac may fail with the below message.