Measurement starts with image acquisition

Software cannot correct a radiograph that is unsuitable for the intended measurement. Positioning, beam alignment, projection, calibration, exposure, windowing, and marker placement all affect the visible anatomy and the resulting value.

A study intended for serial comparison should use a repeatable acquisition method. Kummer and colleagues demonstrated that a defined technique can produce repeatable lateromedial and dorsopalmar hoof measurements. More recent work has also shown that radiographic magnification and the selected measurement method can produce meaningful differences in apparent dimensions.

Before measuring, confirm:

  • Horse, examination date, limb, and projection
  • Weight-bearing and limb position
  • Beam and detector alignment
  • Radiopaque marker placement
  • Calibration information
  • Visibility of every required anatomical margin

Use a defined landmark and calculation method

A measurement name is not enough. The record should also identify the anatomical endpoints, projection, units, calibration, and method used to calculate the value.

DigiHoof stores the final veterinarian-approved landmarks with the measurement result. Calculations are then derived from those approved points. This supports repeatable reporting, but it does not guarantee that two independently acquired radiographs are clinically comparable.

Hoof Balance outputs

The Hoof Balance workflow provides different outputs by projection.

Lateromedial

  • P3 solar-margin angle relative to ground
  • Sole depth at the distal P3 tip
  • Proximal and distal dorsal hoof wall–P3 distances
  • Dorsal hoof wall–P3 angular relationship
  • P3 wing asymmetry
  • Breakover relative to P3
  • Hoof tip–P3 tip distance

Dorsopalmar

  • Medial sole depth
  • Lateral sole depth

These values should be reviewed on the annotated image and the original diagnostic study.

Serial comparison

When comparing studies, match the horse, foot, projection, acquisition technique, calibration, and measurement definition. A numerical difference may reflect clinical change, but it may also reflect positioning, projection, magnification, windowing, or landmark placement.

DigiHoof records prior and current values and can calculate the numerical delta. Interpretation remains the veterinarian’s responsibility.

Reporting

A useful report identifies the study and presents only measurements the veterinarian has reviewed. Reports may include annotated radiographs, selected numerical outputs, clinical photographs, and comparison summaries.

The clinic should export every image and report required for the permanent veterinary medical record. DigiHoof is not a PACS or long-term DICOM archive.

References