Dynamic magnetic resonance imaging parameters for objective assessment of the magnitude of tethered cord syndrome in patients with spinal dysraphism

2018 ◽  
Vol 161 (1) ◽  
pp. 147-159 ◽  
Author(s):  
Suyash Singh ◽  
Sanjay Behari ◽  
Vivek Singh ◽  
Kamlesh S. Bhaisora ◽  
Rudrashish Haldar ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Objective Assessment ◽  
Spinal Dysraphism ◽  
Tethered Cord ◽  
Dynamic Magnetic Resonance Imaging ◽  
Tethered Cord Syndrome ◽  
Resonance Imaging ◽  
Imaging Parameters ◽  
Dynamic Magnetic Resonance

scholarly journals Objective assessment of patellar maltracking with 3 T dynamic magnetic resonance imaging: feasibility of a robust and reliable measuring technique

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Jannik Frings ◽  
Tobias Dust ◽  
Matthias Krause ◽  
Malte Ohlmeier ◽  
Karl-Heinz Frosch ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Objective Assessment ◽  
Dynamic Magnetic Resonance Imaging ◽  
Measuring Technique ◽  
Trochlear Groove ◽  
Resonance Imaging ◽  
Dynamic Magnetic Resonance ◽  
Patellofemoral Maltracking ◽  
Patellar Maltracking

Abstract Patellofemoral maltracking predisposes the patellofemoral joint to instability. The purpose of this study was to provide a reliable dynamic magnetic resonance imaging (MRI) measuring technique for patellofemoral maltracking, and to investigate the influence of anatomical risk factors (AF) on patellar maltracking. Ten patients (2 males,8 females, average 19 years) with clinical maltracking and 20 controls (10 males,10 females,average 28 years) were examined with a dynamic, multi-slice gradient-echo MRI sequence, during repetitive flexion(40°) and full extension, in an open-chain-active-movement. In a 30-s time frame three simultaneous transverse slices were acquired. Dynamic mediolateral translation and dynamic tilt were measured at defined positions, by two independent examiners. Reproducibility was tested in a set of five knees. Common AFs for patellar maltracking (tibial-tuberosity-to-trochlear-groove-(TT-TG)-distances, trochlea-sulcus-angle, trochlea-sulcus-depth, lateral-trochlear-inclination and Caton-Deschamps-Index) were analyzed in consensus, using standard static MRI sequences. In patients, dynamic mediolateral translation was significantly greater in patients (12.4 ± 6.9 mm vs. − 0.1 ± 2.3 mm, p < 0.001) and the patella was positioned significantly more laterally (17.5 ± 6.9 mm vs. 3.1 ± 2.4 mm, p < 0.001) compared to controls. During movement, the patella tilted 16.3 ± 13.1° laterally in patients and 1.9 ± 4.3° medially in controls (dynamic tilt) (p < 0.002). All AFs were significantly different between patients and controls. Pathological TT-TG-distances, Caton-Deschamps-Indices and trochlea-sulcus-angles strongly correlated with dynamic patellar translation and dynamic patellar tilt (p < 0.001). In the patient population, the primary pathologies for maltracking were lateralized-tibial-tubercle (n = 5), trochlea dysplasia n = 2, patella alta (n = 3). Interrater-reliability for translation and tilt-measurement was excellent (0.971/0.976, 95% CIs 0.939–0.986/0.950–0.988). Dynamic MRI reliably differentiates between abnormal and physiological patellar tracking. Dynamic tracking and tilt strongly correlate with measurable AFs, which reinforces their clinical use and validates the presented technique.

Dynamic magnetic resonance imaging in acute pyelonephritis

2009 ◽  
Vol 115 (2) ◽  
pp. 287-300 ◽  
Author(s):  
M.C. Martina ◽  
P.P. Campanino ◽  
F. Caraffo ◽  
C. Marcuccio ◽  
F. Gunetti ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Acute Pyelonephritis ◽  
Dynamic Magnetic Resonance Imaging ◽  
Resonance Imaging ◽  
Dynamic Magnetic Resonance

scholarly journals Assessment of vocal fold mobility using dynamic magnetic resonance imaging and ultrasound in healthy volunteers

2019 ◽  
Vol 84 ◽  
pp. 368-374
Author(s):  
Magdalena Derlatka-Kochel ◽  
Pawel Kumoniewski ◽  
Marcin Majos ◽  
Kamil Ludwisiak ◽  
Lech Pomorski ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Healthy Volunteers ◽  
Vocal Fold ◽  
Dynamic Magnetic Resonance Imaging ◽  
Resonance Imaging ◽  
Dynamic Magnetic Resonance
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