Inter- and intra-observer reliability of patellar height measurements in patients with and without patellar instability on plain radiographs and magnetic resonance imaging

2021 ◽  
Author(s):  
Stephen Picken ◽  
Harry Summers ◽  
Oday Al-Dadah
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Patellar Instability ◽  
Patellar Height ◽  
Resonance Imaging ◽  
Plain Radiographs ◽  
Observer Reliability

scholarly journals The Pathophysiology of Primary Hip Osteoarthritis may Originate from Bone Alterations

2013 ◽  
Vol 7 (1) ◽  
pp. 112-118 ◽  
Author(s):  
Mikio Kamimura ◽  
Yukio Nakamura ◽  
Shota Ikegami ◽  
Keijiro Mukaiyama ◽  
Shigeharu Uchiyama ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Proximal Femur ◽  
Hip Osteoarthritis ◽  
Pain Scale ◽  
Resonance Imaging ◽  
Mineral Density ◽  
Plain Radiographs ◽  
Signal Changes ◽  
Magnetic Resonance Imaging Mri

Objectives: The aim of this study was to investigate whether bone alterations detected by hip magnetic resonance imaging (MRI) were associated with subsequent primary hip OA. Methods: We enrolled 7 patients with hip joint pain from their first visit, at which hip joints were classified as grade 0 or I on the Kellgren-Lawrence grading scale. Plain radiographs and magnetic resonance imaging (MRI) were performed on all cases, and pain was assessed with the Denis pain scale. Average age, height, weight, body mass index, bone mineral density (L1-4), central edge angle, Sharp’s angle, and acetabular hip index were calculated. Results: Within two months of the onset of pain, 4 of the 7 cases showed broad bone signal changes, while 3 cases showed local signal changes in the proximal femur on hip MRI. Three to 6 months after the onset of pain, in all patients whose pain was much improved, plain radiographs showed progression to further-stage OA. Conclusion: Our findings suggest that bone abnormalities in the proximal femur might be involved in the pathogenesis of primary hip OA.

scholarly journals Ossification of Transverse Ligament of Atlas Causing Cervical Myelopathy: A Case Report and Review of the Literature

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Tatsuro Sasaji ◽  
Chikashi Kawahara ◽  
Fujio Matsumoto
Keyword(s):  
Magnetic Resonance Imaging ◽  
Spinal Cord ◽  
Case Report ◽  
Magnetic Resonance ◽  
Cervical Myelopathy ◽  
Review Of The Literature ◽  
Transverse Ligament ◽  
Resonance Imaging ◽  
Posterior Decompression ◽  
Plain Radiographs

A case of ossification of transverse ligament of atlas (TLA) is reported. A 76-year-old female suffered from a transverse type myelopathy was successfully treated by posterior decompression. Dynamic lateral plain radiographs showed irreducible atlantoaxial subluxation (AAS). A computed tomogram revealed ossified mass compatible to ossification of TLA. Coalition of the atlantooccipital joints and osteoarthritis of the atlantoaxial joints with degenerated dens was also revealed. Magnetic resonance imaging showed compressed spinal cord at C1 level by the ossification of TLA and AAS. We suggest a mechanism of ossification of TLA as follows: hypertrophied dens and stress to the atlantoaxial joints caused by coalition of atlantooccipital joints could make forward shift of atlas leading to irreducible AAS, and continuous tension given to TLA from irreducible AAS would result in hypertrophied and ossification of TLA.

scholarly journals Anatomic Magnetic Resonance Imaging Measurements in First-Time Patellar Dislocators by Sex and Age

2019 ◽  
Vol 54 (8) ◽  
pp. 901-905
Author(s):  
Nathan L. Grimm ◽  
Benjamin M. Wooster ◽  
David M. Tainter ◽  
Beau J. Kildow ◽  
Jaewhan Kim ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Intraclass Correlation ◽  
Case Series ◽  
Patellar Height ◽  
Resonance Imaging ◽  
Sulcus Angle ◽  
Magnetic Resonance Imaging Analysis ◽  
First Time ◽  
Patellotrochlear Index

Context Anatomic differences of the knee in first-time patellar dislocators have not been clearly elucidated. Objective To compare structural differences of the knee in those who have sustained an acute first-time patellar dislocation resulting in a medial patellofemoral ligament (MPFL) tear by sex and age (≤17 years old, ≥18 years old). Design Case series. Setting Retrospective magnetic resonance imaging analysis. Patients or Other Participants Thirty-five acute first-time patellar dislocators with an associated MPFL tear. Main Outcome Measure(s) Patellar height using 3 methods, patellar alignment using congruency angles, and trochlear morphology using the sulcus angle. We compared the means of these variables by sex and age. The intraclass correlation coefficient was then calculated to assess the agreement of the independent reviewers. Results A total of 21 left and 14 right knees were analyzed. The MPFL tear location did not differ by sex (P = .34) or age (P = .43). Patellar height did not differ as measured by the Caton-Deschamps ratio (P = .29 for sex, P = .49 for age), Insall-Salvati index (P = .15 for sex, P = .33 for age), or patellotrochlear index (P = .67 for sex, P = .49 for age). The congruence angle (P = .81 for sex, P = .06 for age) and trochlear morphology as measured by the sulcus angle (P = .64 for sex, P = .45 for age) were similar between groups. Conclusions Patellar height and trochlear morphology did not differ by sex or age among patients whose first-time patellar dislocations resulted in an MPFL tear. In addition, the location of the tear did not appear to vary by sex or age.

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