Any image works — a DICOM export, a phone photo of a film, or a web image (JPG/PNG). Fill the patient details, calibrate the scale, then measure lengths in cm, mark points, draw lines and measure angles.
3
100%
Scale: not set
Patient Details required
Digital Scale (cm)
Not calibrated — lengths shown in pixels.
Draw a line over a known distance — a radio-opaque marker ball (usually 25 mm), a scale bar, or a ruler in the film — then enter its real length in cm. A marker at the bone plane already corrects magnification.
Magnification: 100% (no correction)
MF = SID / (SID − OID); real length = film length ÷ MF. Use this when your scale is at the detector plane (e.g. DICOM pixel spacing) — it removes the beam-divergence magnification so lengths match true bone size.
Marks & Measurements 0
No marks yet. Pick a tool and draw on the image.
Sample X-rays 0
Real limb radiographs (Wikimedia Commons, CC BY-SA). Several tibia / forearm films include a radio-opaque marker — good for practising scale calibration. Credit is shown when a film is loaded.
Predicted Bone Lengths (from height)
Population-average estimates (bone length ≈ a fixed fraction of stature). Individual bones vary — use these as an expected value to compare against your measured scanogram length, not as a diagnosis.
How to use
Tools: V move · P point · L line · M measure(cm) · A goniometer · C two-line/Cobb angle · T text · calibrate · pan.
Goniometer (A): click three points — first arm end, the vertex, then the second arm end. The angle at the vertex is shown with an arc.
Two-line angle (C): click four points — line 1 (two clicks), then line 2 (two clicks). The angle between the lines is shown (e.g. a Cobb angle).
Measure (M): after calibrating, lengths read in cm.
Save stores the case (image + marks + patient) on this device and as a downloadable .ocase file you can share; Open reloads one. Download saves a patient-headed image; Share uses your device share sheet.