A clinical measurement tool for orthopaedic imaging analysis including angle measurement, TT-TG distance, femoral anteversion, and lower extremity alignment planning.
DISCLAIMER
This tool is intended for educational and research purposes only. All measurements must be verified by a qualified clinician before use in clinical decision-making. Not a substitute for professional medical judgement.
RADIOGRAPH INPUT
TOOLS
LAST MEASUREMENT
—
MEASUREMENTS
●V Apex
● Arms
● Cobb
Drag any point to adjust. Pinch 2 fingers to zoom/pan.
PELVIC PARAMETERS
Pelvic Incidence (PI)—
Sacral Slope (SS)—
Pelvic Tilt (PT)—
PI = SS + PT
Upload an X-ray then choose a tool.
🩻
NO RADIOGRAPH LOADED
Upload an X-ray to begin
scroll to zoom · drag to pan
MEASUREMENT
ANGLE TOOLS
RADIOGRAPH INPUT
TOOLS
PELVIC PARAMETERS
PI—
SS—
PT—
MEASUREMENTS
1
TROCHLEA IMAGE
2
TUBEROSITY IMAGE
OVERLAY OPACITY
TGTT
3
CALIBRATION RULER
Known dist:mm
4
EPICONDYLE BASELINE
5
TROCHLEAR GROOVE
6
TIBIAL TUBEROSITY
TT-TG DISTANCE
—
Upload both MRI axial slices to begin TT-TG measurement.
Pinch 2 fingers to zoom/pan.
🦴
UPLOAD BOTH IMAGES
Trochlea + Tibial Tuberosity slices
scroll to zoom · drag to pan
TT-TG DISTANCE
1
TROCHLEA IMAGE
2
TUBEROSITY IMAGE
OVERLAY OPACITY
TGTT
3
CALIBRATION
mm
4
pFCL BASELINE
5
TROCHLEAR GROOVE
6
TIBIAL TUBEROSITY
TT-TG DISTANCE
Distance—
1
FEMORAL NECK CT
2
POSTERIOR CONDYLES CT
SIDE
OVERLAY OPACITY
NeckCondyles
3
FEMORAL NECK AXIS
Tap 2 pts along the center of the femoral neck
4
POSTERIOR CONDYLE AXIS
Tap 2 pts along the posterior condyle tangent line
FEMORAL VERSION
—
—
normal range: 10–20° anteversion
Upload both CT axial slices then draw the two axes to measure femoral anteversion.
Pinch 2 fingers to zoom/pan.
🦴
UPLOAD BOTH CT SLICES
Femoral neck + Posterior condyles
scroll to zoom · drag to pan
FEMORAL ANTEVERSION
1
FEMORAL NECK CT
2
POSTERIOR CONDYLES CT
SIDE
OVERLAY OPACITY
NeckCondyles
FEMORAL ANTEVERSION
—
SIDE: RIGHT
ANTEVERSION
Angle—
1
HIP-TO-ANKLE X-RAY
CALIBRATION
mm distance
LANDMARKS (tap to place)
JOINT LINES (2 pts each)
ALIGNMENT RESULTS
Limb Length (MA)—
Alignment—
MAD at knee—
HKA angle—
mLDFA—
mMPTA—
LDTA—
NSA—
JLCA—
AMA angle—
Femoral CORA—
Tibial CORA—
CORA
—
DEFORMITY SITE
—
Upload a full-length AP lower extremity X-ray (hip to ankle) to begin alignment analysis.