CUTFORTORTHOPEDIC MEASUREMENT ATLASIndependent session · images stay on this deviceDeformity / HTO

01 / REGION AND PACKAGE

Orthopedic Measurement Atlas

Routine measurements are preselected. Add those you need; place shared landmarks once.

Anatomical regionMeasurement packageTri-R/Tri-L are shared by both hips. Age is used to interpret reference values; it does not replace visible anatomical landmarks.

Routine Measurements

Hilgenreiner line

Perkins–Ombredanne line

Acetabular index

Shenton–Ménard line

Optional Measurements

Ossific nucleus analysis

Tönnis DDH grading · I–IV

IHDI classification

Reimers migration percentage

LCEA · sourcil method

Routine/optional selections are an editable starting set, not a mandatory clinical protocol for every patient.

02 / METHOD AND PATIENT INFORMATION

Recommended image: AP pelvis

Acquisition information is descriptive; no mandatory radiograph approval is required. Landmarks from different projections must not be mixed.Bilateral MeasurementTwo independent sides on the same image

Patient sideAge (months) · for interpretation

Triradiate cartilage

Hilgenreiner line: Select the patient side. Image laterality is not inferred from screen position.

Perkins–Ombredanne line: Select the patient side. Image laterality is not inferred from screen position.

Acetabular index: Select the patient side. Image laterality is not inferred from screen position.

Shenton–Ménard line: Select the patient side. Image laterality is not inferred from screen position.

Calibration · method-dependent

Required for measurements in mm. Angles/ratios, including PTS using two freely selected shaft levels, are scale-independent.

Known reference length (mm)

No calibration

The reference must lie in the anatomical plane. DICOM spacing does not guarantee correction for anatomical magnification.

RADIOGRAPHIC WORKSPACE

Open a radiograph first

PNG, JPG, or a supported single-frame DICOM file.
The image is not sent to a server.

MEASUREMENT RESULTS

Basic DDH Assessment

4 measurements · 0 results ready

Click a value to show one angle in detail. Click again to hide it. References are not automatic diagnostic cutoffs.

Measurement results – No side selected
Measurement	Value
No numerical normal range
No numerical normal range
Age is required to interpret age-specific reference values.
No numerical normal range

Method, References and Sources

Measurement explained

Hilgenreiner line

Pelvic horizontal line connecting the right and left triradiate landmarks.

Imaging: AP pelvis. Pelvic rotation and tilt affect landmarks; this is method guidance, not an approval question.

Visible anatomical landmarks appropriate for age and ossification are required.

Anatomical landmarks

Tri-R · Right triradiate landmark
Tri-L · Left triradiate landmark

Reference values / clinical context

Age is required to interpret age-specific reference values.

A geometric guide; it does not establish a diagnosis or treatment decision on its own.

Narayanan et al., 2015 · IHDI classification

Line–Point Settings

Anatomical axis line widthAuxiliary/projection line widthImage coordinates and calculations remain unchanged. Small points retain a generous selection area.

Radiographic Position Findings

No side selected · Insufficient data / not assessable

A descriptive synthesis of findings, not a validated diagnostic score. IHDI is used with Shenton/coverage observations. Clinical instability and reducibility are not inferred from the radiograph.

Shenton–Ménard continuity preservedAdequate coverage on age-appropriate assessmentObservations are entered by the clinician. A single AI angle or IHDI grade does not establish a definitive diagnosis.

Source:Campbell’s Operative Orthopaedics · 14th ed. · 2021 · 30 · Congenital and Developmental Abnormalities of the Hip and Pelvis· p.1187–1191 · Figures 30.4–30.5

Treatment Approach

No side selected· Clinical education and decision support

A measurement alone is not a diagnosis or surgical indication. It does not replace examination and specialist assessment. Clinical information is kept in this session only, separately for each side.

Current measurements

Hilgenreiner line: —
Perkins–Ombredanne line: —
Acetabular index: —
Shenton–Ménard line: —

Age:unknown. IHDI and Tönnis are not interchangeable.

Clinical information for this approach · optional

Hip unstable on examinationDislocation confirmed by clinicianClinically reduciblePavlik treatment failure / persistent dislocationResidual acetabular dysplasiaConcentric reduction confirmedCongruent hip jointHip-related clinical symptoms presentLate adolescence / skeletal maturity confirmedOther osteotomies cannot achieve congruence

Approach matching the current information

Clinical information is missing for this treatment branch or does not match a verified branch. You can review the general approach below.

Missing clinical information was not treated as negative; other branches were not evaluated.

Only reviewed textbook sections are enabled. Pending branches do not generate recommendations. Age groups may overlap in the source; interface boundaries provide guidance, not definitive treatment cutoffs.

Independent of CORA, osteotomy, HTO and 3D CT sessions. Refreshing loses the current work. Software tests are not clinical validation.

CUTFORT · Orthopedic Measurement Atlas