Evaluation of T2-weighted versus short-tau inversion recovery sagittal sequences in the identification and localization of canine intervertebral disc extrusion with low-field magnetic resonance imaging

2017 ◽  
Vol 58 (4) ◽  
pp. 433-443 ◽  
Author(s):  
Daniel Housley ◽  
Abby Caine ◽  
Giunio Cherubini ◽  
Olivier Taeymans
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Intervertebral Disc ◽  
Inversion Recovery ◽  
Resonance Imaging ◽  
Low Field ◽  
Short Tau Inversion Recovery ◽  
Disc Extrusion

Magnetic resonance imaging versus computed tomography to plan hemilaminectomies in chondrodystrophic dogs with intervertebral disc extrusion

2017 ◽  
Vol 46 (7) ◽  
pp. 1025-1031 ◽  
Author(s):  
Julie A. Noyes ◽  
Stephanie A. Thomovsky ◽  
Annie V. Chen ◽  
Tina J. Owen ◽  
Boel A. Fransson ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Intervertebral Disc ◽  
Resonance Imaging ◽  
Disc Extrusion

Pathological findings in low-field magnetic resonance imaging of the canine spine – a study of 112 patients

2017 ◽  
Vol 20 (2) ◽  
pp. 285-291
Author(s):  
P. Holak ◽  
J. Głodek ◽  
M. Mieszkowska ◽  
M. Jałyński ◽  
Y. Zhalniarovich ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Intervertebral Disc ◽  
Contrast Medium ◽  
Spin Echo ◽  
Pathological Changes ◽  
Resonance Imaging ◽  
Intervertebral Disc Disease ◽  
Disc Disease ◽  
Low Field

Abstract Magnetic resonance imaging (MRI) is a method of choice in diagnosing nervous system disorders. This paper presents the results of a study where selected segments of the canine spine were examined by low-field MRI in 112 patients. Images of pathological changes were obtained in spin echo (SE), fast spin echo (FSE) and hybrid contrast enhancement (3D HYCE) sequences. The cervical region of the spinal cord (C1-C5) was examined in 32 patients, the cervicothoracic region (C6-Th2)- in 14 patients, the thoracolumbar region (Th3-L3) – in 23 patients, and the lumbosacral region (L4-S3) – in 43 patients. The results were used to determine the incidence of pathological changes in different sections of the canine spine, such as intervertebral disc disease (IDD), disc desiccation, syringomyelia and changes characterized by higher uptake of the contrast medium. Intervertebral disc disease was diagnosed in 52.7% of patients and it was the most common abnormality. Disc dehydratation without protrusion or extrusion was noted in 23.2% of animals. Pathological changes with increased uptake of the contrast medium and indicative of neoplastic growth were observed in 13.4% of patients and syringomyelia was diagnosed in 9.82% of the examined animals. The proposed sequences revealed the presence of above abnormalities.

Detection of multiple sclerosis lesions in the cervical cord: which of the MAGNIMS ‘mandatory’ non-gadolinium enhanced sagittal sequences is optimal at 3T?

2021 ◽  
pp. 197140092110177
Author(s):  
Chian A Chang ◽  
Abigail L Chong ◽  
Ronil V Chandra ◽  
Ernest Butler ◽  
Deepa Rajendran ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Multiple Sclerosis ◽  
Magnetic Resonance ◽  
Spin Echo ◽  
Inversion Recovery ◽  
Fast Spin Echo ◽  
Proton Density ◽  
Resonance Imaging ◽  
Short Tau Inversion Recovery ◽  
Fast Spin

Background and purpose The magnetic resonance imaging in multiple sclerosis consensus guidelines currently mandate three sagittal non-contrast enhanced sequences of T2-weighted fast spin echo, proton density-weighted fast spin echo and short tau inversion recovery; however, these particular three sequences have not previously been compared at 3T. This study compared T2-weighted fast spin echo, proton density-weighted fast spin echo, short tau inversion recovery as well as the double inversion recovery sequence for the sagittal detection of multiple sclerosis lesions in the cervical spinal cord at 3T. Methods Nineteen multiple sclerosis patients underwent magnetic resonance imaging with 3T sagittal T2-weighted fast spin echo, proton density-weighted fast spin echo, short tau inversion recovery and double inversion recovery between November 2012 and April 2013. Two neuroradiologists independently reviewed the images, and the number of lesions detected on each sequence was recorded. Lesion conspicuity was quantitatively assessed with the lesion-to-cord-contrast ratio and lesion contrast-to-noise ratio. The Wilcoxon signed rank test was performed for statistical analysis. Results Proton density-weighted fast spin echo and short tau inversion recovery detected 32% more lesions compared to T2-weighted fast spin echo, and 37% more lesions compared to double inversion recovery. The lesion-to-cord-contrast ratio was highest in short tau inversion recovery, while the lesion contrast-to-noise ratio was highest for proton density-weighted fast spin echo. Conclusions This study provides the necessary evidentiary support at 3T for the magnetic resonance imaging in multiple sclerosis spinal magnetic resonance imaging protocol consensus guidelines. At 3T sagittal proton density-weighted fast spin echo and short tau inversion recovery sequences allowed improved detection of cervical spinal cord multiple sclerosis lesions, compared to T2-weighted fast spin echo and three-dimensional double inversion recovery magnetic resonance imaging. Utilising T2-weighted fast spin echo alone at 3T is insufficient for lesion detection.

Value of perineural edema/inflammation detected by fat saturation sequences in lumbar magnetic resonance imaging of patients with unilateral sciatica

2009 ◽  
Vol 50 (2) ◽  
pp. 205-211 ◽  
Author(s):  
M. Şirvanci ◽  
B. Kara ◽  
C. Duran ◽  
E. Ozturk ◽  
O. Karatoprak ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Nerve Root ◽  
Magnetic Resonance Images ◽  
Inversion Recovery ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Pain Location ◽  
Pain Drawings ◽  
Short Tau Inversion Recovery

Background: Routine lumbar spine magnetic resonance imaging (MRI) may not show any evidence of the cause of sciatica in some cases. The relationship between nerve root compression detected on lumbar MRI and sciatica is also sometimes uncertain. Purpose: To ascertain whether axial (and, when necessary, sagittal and coronal) short-tau inversion recovery or fat-saturated T2-weighted MRI findings can be used to study the level of sciatica in patients with a non-yielding routine MRI examination. Material and Methods: A total of 215 patients with unilateral sciatica underwent MRI. All patients were asked to complete pain drawing forms describing their pain dermatomal distributions. Perineural edema/inflammation corresponding to the pain location indicated by the pain drawings was sought on short-tau inversion recovery or fat-saturated T2-weighted images. Results: Routine MRI findings revealed that 110 of the 215 patients had nerve root compromise related to the patients’ symptoms. Routine MRI could not ascertain the cause of these symptoms in the remaining 105 patients. In 31 (29.5%) of these 105 patients, short-tau inversion recovery or fat-saturated T2-weighted magnetic resonance images revealed perineural edema/inflammation surrounding the nerve roots related to the pain locations indicated in the pain drawings. Conclusion: Axial (and, when required, sagittal and coronal) short-tau inversion recovery or fat-saturated T2-weighted magnetic resonance images may be helpful for revealing additional findings in cases of unexplained sciatica in standard magnetic resonance imaging. However, the value of this imaging may be not great enough to justify routine use of these additional sequences to study the level of sciatica.

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