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Four-dimensional computed tomographic analysis of screw home movement in patients with anterior cruciate ligament deficient knee — a 3D-3D registration technique

Four-dimensional computed tomographic analysis of screw home movement in patients with anterior... ObjectiveThe tibia externally rotates to the femur during the last 20° of the knee extension motion. This kinematic phenomenon is well known as screw home movement (SHM). The purpose was to clarify the SHM in anterior cruciate ligament deficient (ACLD) knee using four-dimensional computed tomography (4DCT).Materials and methodsSix patients with a unilateral isolated ACLD knee participated. In the static position, CT scan of the both limbs of the femur and tibia were performed. Then, 4DCT was performed around knee. In the CT gantry, subjects were positioned in supine position with 45° of knee flexion on a triangle pillow and were asked to extend the knee to full extension within 10 s on each limb. The CT data were accumulated in digital imaging and communication in medicine (DICOM) data format. From the static CT and 4DCT DICOM data, three-dimensional surfaces of the knee joint were reconstructed. The whole tibia surface was matched into the partial tibia surface of that frame using 3D-3D registration technique. After the assessment of coordination system of the whole leg, knee flexion, abduction, and external rotation angle were calculated.ResultsKnee external rotation angle was significantly smaller on the ACLD side than on the contralateral unaffected side in 0–15° of knee flexion (P < 0.05 in 0, 5, 10, and 15 degrees), while the angle was similar during 15–60° of knee flexion.ConclusionThe absence of SHM in ACLD knee was detected using 3D-3D registration technique based on 4DCT. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Skeletal Radiology Springer Journals

Four-dimensional computed tomographic analysis of screw home movement in patients with anterior cruciate ligament deficient knee — a 3D-3D registration technique

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References (24)

Publisher
Springer Journals
Copyright
Copyright © ISS 2022
ISSN
0364-2348
eISSN
1432-2161
DOI
10.1007/s00256-021-03986-3
Publisher site
See Article on Publisher Site

Abstract

ObjectiveThe tibia externally rotates to the femur during the last 20° of the knee extension motion. This kinematic phenomenon is well known as screw home movement (SHM). The purpose was to clarify the SHM in anterior cruciate ligament deficient (ACLD) knee using four-dimensional computed tomography (4DCT).Materials and methodsSix patients with a unilateral isolated ACLD knee participated. In the static position, CT scan of the both limbs of the femur and tibia were performed. Then, 4DCT was performed around knee. In the CT gantry, subjects were positioned in supine position with 45° of knee flexion on a triangle pillow and were asked to extend the knee to full extension within 10 s on each limb. The CT data were accumulated in digital imaging and communication in medicine (DICOM) data format. From the static CT and 4DCT DICOM data, three-dimensional surfaces of the knee joint were reconstructed. The whole tibia surface was matched into the partial tibia surface of that frame using 3D-3D registration technique. After the assessment of coordination system of the whole leg, knee flexion, abduction, and external rotation angle were calculated.ResultsKnee external rotation angle was significantly smaller on the ACLD side than on the contralateral unaffected side in 0–15° of knee flexion (P < 0.05 in 0, 5, 10, and 15 degrees), while the angle was similar during 15–60° of knee flexion.ConclusionThe absence of SHM in ACLD knee was detected using 3D-3D registration technique based on 4DCT.

Journal

Skeletal RadiologySpringer Journals

Published: Aug 1, 2022

Keywords: Screw home movement; Four-dimensional computed tomography; Anterior cruciate ligament deficient; Knee

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