XROMM

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X-ray Reconstruction of Moving Morphology (XROMM) is a 3D imaging technology, developed at Brown University, for visualizing rapid skeletal movement in vivo. [1, 2]

General Procedure

1. Collect motion data
2. Track markers
3. Calculate rigid body transformations
4. CT scanning
5. Preparing rigid body meshes
6. Animate rigid bodies
7. Analyze motion data

Collect motion data

1. Bi-planar fluoroscopy facilities
2. Surgically implant markers
3. Calibrate cameras
4. Record motion
5. Save motion

Track markers

In XMALab.

1. Undistort
2. Calibrate
3. Track

Calculate rigid body transformations

In XMALab.

CT scanning

Partner CT scanning facilities.

Preparing rigid body meshes

In Horos.

1. Import files
   1. Import image files to Horos
   2. Import dicom files
2. Remove volume
   1. Remove volume in 2D viewer
   2. Remove volume in 3D viewer
3. Save as OBJ

Animate rigid bodies

In Maya.

Analyze motion data

In Maya.

References

1. Brainerd, Elizabeth L., David B. Baier, Stephen M. Gatesy, Tyson L. Hedrick, Keith A. Metzger, Susannah L. Gilbert, and Joseph J. Crisco. "X‐ray reconstruction of moving morphology (XROMM): precision, accuracy and applications in comparative biomechanics research." Journal of Experimental Zoology Part A: Ecological and Integrative Physiology 313, no. 5 (2010): 262-279. DOI: 10.1002/jez.589

2. Knörlein, Benjamin J., David B. Baier, Stephen M. Gatesy, J. D. Laurence-Chasen, and Elizabeth L. Brainerd. "Validation of XMALab software for marker-based XROMM." Journal of Experimental Biology 219, no. 23 (2016): 3701-3711. 10.1242/jeb.145383

External links

• xromm.org