CBCT Analyzer AI

CatPhan phantom analysis (504, 503, 600, 604): HU linearity, uniformity, spatial resolution.

CBCT slices (ZIP of DICOM files)

All the axial slices of one CatPhan acquisition, in one ZIP.

CatPhan model

HU tolerance

Geometry tolerance (mm)

Slice thickness tolerance (mm)

Low contrast: objects to see

Contrast method

Reference values (ANSM baseline)

ANSM compares each semi-annual control with the values of your reference control. Reload the cbct_baseline.json saved after that control, or type the values. Empty HU fields use the nominal values.

Reference values file (optional)

The cbct_baseline.json downloaded after your reference (initial) control.

Air (HU)

PMP (HU)

LDPE (HU)

Poly (HU)

Acrylic (HU)

Delrin (HU)

Teflon (HU)

Uniformity index

NPS max frequency

NPS average power

MTF 50 % (lp/mm)

MTF 10 % (lp/mm)

Low contrast visible objects

Report

Author (report)

Comment (report)

Engine: pylinac CatPhan. The analysis takes about 10 seconds. Your files are deleted within one hour. Do not upload identifiable patient data.

Analysing the CBCT series (about 10 s)…

No analysis yet.

Upload a ZIP of CatPhan slices, or run the CatPhan 504 demo, to see the results here.

How it works

Scan a CatPhan phantom, export the axial slices as DICOM and put them in one ZIP.
pylinac locates each module and measures HU linearity, geometry and slice thickness (CTP404), uniformity and noise power (CTP486), spatial resolution / MTF (CTP528) and low contrast (CTP515).
Each value is compared with your reference control, as required by the ANSM decision of 28 February 2023 (controls 4C.1.1 to 4C.1.6). Without reference values the status is « incomplete ».
Download cbct_baseline.json after your reference control and reload it at every following control.

Documentation: pylinac CBCT.