MR imaging of the forefoot under weight-bearing conditions: Position-related changes of the neurovascular bundles and the metatarsal heads in asymptomatic volunteers

2002 ◽  
Vol 16 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Dominik Weishaupt ◽  
Karl Treiber ◽  
Hilaire A.C. Jacob ◽  
Hans-Peter Kundert ◽  
Juerg Hodler ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Weight Bearing ◽  
Asymptomatic Volunteers ◽  
Neurovascular Bundles

Reliability of standing weight-bearing (0.25T) MR imaging findings and positional changes in the lumbar spine

2017 ◽  
Vol 47 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Bjarke B. Hansen ◽  
Philip Hansen ◽  
Anders F. Christensen ◽  
Charlotte Trampedach ◽  
Zoreh Rasti ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Mr Imaging ◽  
Weight Bearing ◽  
Imaging Findings

MR imaging of meniscal subluxation in the knee

1997 ◽  
Vol 38 (5) ◽  
pp. 876-879 ◽  
Author(s):  
M. J. Breitenseher ◽  
S. Trattni ◽  
I. Dobrocky ◽  
C. Kukla ◽  
S. Nehrer ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Knee Joint ◽  
Tibial Plateau ◽  
Medial Meniscus ◽  
Lateral Meniscus ◽  
Joint Effusion ◽  
Normal Position ◽  
Rare Finding ◽  
Asymptomatic Volunteers ◽  
The Mean

Purpose: The aim of this study was to establish diagnostic criteria for meniscal subluxation, and to determine whether there was any connection between meniscal subluxation and other common meniscal and knee-joint abnormalities. Material and Methods: The normal position of the meniscal body was assessed in 10 asymptomatic volunteers. MR signs of meniscal subluxation were evaluated retrospectively in 60 symptomatic patients with pain in the knee, impaired mobility, and/or joint swelling who had no clear diagnosis after the evaluation of case history, clinical examination, and radiography. The criterion for subluxation of the meniscus was defined as a distance of ≥3 mm between the peripheral border of the meniscus and the edge of the tibial plateau. Results: In the volunteers, the mean distance from the medial meniscus to the edge of the tibial plateau was 0.07 mm, and that from the lateral meniscus was 0 mm. In 55 symptomatic patients without meniscal subluxation, the mean distance from.the meniscus to the edge of the tibial plateau was 0.27 mm. Five patients (8%) had evidence of meniscal subluxation, 4 in the medial meniscus and one in the lateral meniscus. The most commonly associated knee abnormality was joint effusion in 5 knees and osteoarthritis in 2 knees. Conclusion: Meniscal subluxation was not a rare finding with MR imaging in patients with painful knees. Meniscal subluxation was associated with other knee abnormalities such as joint effusion or osteoarthritis.

Temporomandibular Joint Disk Position Assessed at Coronal MR Imaging in Asymptomatic Volunteers

Radiology ◽  
2005 ◽  
Vol 236 (2) ◽  
pp. 559-564 ◽  
Author(s):  
Marc Schmitter ◽  
Bodo Kress ◽  
Christina Ludwig ◽  
Andreas Koob ◽  
Olaf Gabbert ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Temporomandibular Joint ◽  
Asymptomatic Volunteers

Morton Neuroma: MR Imaging in Prone, Supine, and Upright Weight-bearing Body Positions

Radiology ◽  
2003 ◽  
Vol 226 (3) ◽  
pp. 849-856 ◽  
Author(s):  
Dominik Weishaupt ◽  
Karl Treiber ◽  
Hans-Peter Kundert ◽  
Hans Zollinger ◽  
Patrice Vienne ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Weight Bearing ◽  
Morton Neuroma

Weightbearing CT Analysis of the Transverse Tarsal Joint During Eversion and Inversion

2021 ◽  
pp. 107110072110348
Author(s):  
Nicholas Rowe ◽  
Cassandra E. Robertson ◽  
Stuti Singh ◽  
John T. Campbell ◽  
Clifford L. Jeng
Keyword(s):  
Weight Bearing ◽  
Current Data ◽  
Ct Scans ◽  
Joint Surface ◽  
Accurate Information ◽  
Tarsal Joint ◽  
Locking Mechanism ◽  
Principal Axes ◽  
Asymptomatic Volunteers ◽  
Weightbearing Ct

Background: Understanding of the movement and function of the transverse tarsal joint (TTJt) continues to evolve. Most studies have been done in cadavers or under nonphysiologic conditions. Weightbearing computed tomographic (WBCT) scans may provide more accurate information about the position of the TTJt when the hindfoot is in valgus or varus. Methods: Five volunteers underwent bilateral weightbearing CT scans while standing on a platform that positioned both hindfeet in 20 degrees of valgus and 20 degrees of varus. Each bone of the foot was segmented, and the joint surfaces of the talus, calcaneus, cuboid, and navicular were identified. The principal axes for each joint surface were determined and used to calculate the angles and distances between the bones with the foot in valgus or varus. Results: In the coronal plane, the angle between the talus and calcaneus rotated 17.1 degrees as the hindfoot moved from valgus to varus. The distance between the centers of the talus and calcaneus decreased 7.1 mm. The cuboid translated 3.9 mm medially relative to the calcaneus. There was no change in angle or distance between the cuboid and navicular. The navicular rotated 25.4 degrees into varus relative to the talus. Conclusion: The TTJt locking mechanism was previously thought to occur from the talonavicular and calcaneocuboid joint axes moving from parallel to divergent as the hindfoot inverts. The current data show a more complex interaction between the four bones that comprise the TTJt and suggests that the locking mechanism may occur because of tightening of the ligaments and joint capsules. Clinical relevance: This study uses weight bearing CT scans of healthy, asymptomatic volunteers standing on valgus and varus platforms to characterize the normal motion of the transverse tarsal joint of the foot. A better understanding of how the transverse tarsal joint functions may assist clinicians in both the conservative and surgical management of hindfoot pathology.

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