Comparison of magnetic resonance imaging with standing cervical radiographs for evaluation of vertebral canal stenosis in equine cervical stenotic myelopathy

2014 ◽  
Vol 46 (6) ◽  
pp. 681-686 ◽  
Author(s):  
J. G. Janes ◽  
K. S. Garrett ◽  
K. J. McQuerry ◽  
A. P. Pease ◽  
N. M. Williams ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Vertebral Canal ◽  
Canal Stenosis ◽  
Cervical Stenotic Myelopathy

Bony cochlear nerve canal and internal auditory canal measures predict cochlear nerve status

2017 ◽  
Vol 131 (8) ◽  
pp. 676-683 ◽  
Author(s):  
E Tahir ◽  
M D Bajin ◽  
G Atay ◽  
B Ö Mocan ◽  
L Sennaroğlu
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Temporal Bone ◽  
Internal Auditory Canal ◽  
Cochlear Nerve ◽  
Resonance Imaging ◽  
Canal Stenosis ◽  
Canal Diameter ◽  
Canal Atresia

AbstractObjectives:The bony cochlear nerve canal is the space between the fundus of the internal auditory canal and the base of the cochlear modiolus that carries cochlear nerve fibres. This study aimed to determine the distribution of bony labyrinth anomalies and cochlear nerve anomalies in patients with bony cochlear nerve canal and internal auditory canal atresia and stenosis, and then to compare the diameter of the bony cochlear nerve canal and internal auditory canal with cochlear nerve status.Methods:The study included 38 sensorineural hearing loss patients (59 ears) in whom the bony cochlear nerve canal diameter at the mid-modiolus was 1.5 mm or less. Atretic and stenotic bony cochlear nerve canals were examined separately, and internal auditory canals with a mid-point diameter of less than 2 mm were considered stenotic. Temporal bone computed tomography and magnetic resonance imaging scans were reviewed to determine cochlear nerve status.Results:Cochlear hypoplasia was noted in 44 out of 59 ears (75 per cent) with a bony cochlear nerve canal diameter at the mid-modiolus of 1.5 mm or less. Approximately 33 per cent of ears with bony cochlear nerve canal stenosis also had a stenotic internal auditory canal and 84 per cent had a hypoplastic or aplastic cochlear nerve. All patients with bony cochlear nerve canal atresia had cochlear nerve deficiency. The cochlear nerve was hypoplastic or aplastic when the diameter of the bony cochlear nerve canal was less than 1.5 mm and the diameter of the internal auditory canal was less than 2 mm.Conclusion:The cochlear nerve may be aplastic or hypoplastic even if temporal bone computed tomography findings indicate a normal cochlea. If possible, patients scheduled to receive a cochlear implant should undergo both computed tomography and magnetic resonance imaging of the temporal bone. The bony cochlear nerve canal and internal auditory canal are complementary structures, and both should be assessed to determine cochlear nerve status.

scholarly journals Redundant nerve roots of the cauda equina: review of the literature

2012 ◽  
Vol 45 (3) ◽  
pp. 155-159 ◽  
Author(s):  
Marcello Henrique Nogueira-Barbosa ◽  
Leonor Garbin Savarese ◽  
Carlos Fernando Pereira da Silva Herrero ◽  
Helton Luiz Aparecido Defino
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Cauda Equina ◽  
Imaging Method ◽  
Resonance Imaging ◽  
Nerve Roots ◽  
Canal Stenosis ◽  
Close Relationship ◽  
The Moment ◽  
Lumbar Spinal

In imaging diagnosis, redundant nerve roots of the cauda equina are characterized by the presence of elongated, enlarged and tortuous nerve roots in close relationship with a high-grade lumbar spinal canal stenosis. This is not an independent entity, but it is believed to be a consequence of the chronic compression at the level of the lumbar canal stenosis and thus may be part of the natural history of lumbar spinal stenosis. The present paper is aimed at reviewing the histopathological, electrophysiological and imaging findings, particularly at magnetic resonance imaging, as well as the clinical meaning of this entity. As the current assessment of canal stenosis and root compression is preferably performed by means of magnetic resonance imaging, this is the imaging method by which the condition is identified. The recognition of redundant nerve roots at magnetic resonance imaging is important, particularly to avoid misdiagnosing other conditions such as intradural arteriovenous malformations. The literature approaching the clinical relevance of the presence of redundant nerve roots is controversial. There are articles suggesting that the pathological changes of the nerve roots are irreversible at the moment of diagnosis and therefore neurological symptoms are less likely to improve with surgical decompression, but such concept is not a consensus.

Diagnostic Importance of Axial Loaded Magnetic Resonance Imaging in Patients with Suspected Lumbar Spinal Canal Stenosis

2019 ◽  
Vol 127 ◽  
pp. e69-e75
Author(s):  
Hadi Sasani ◽  
Bilgehan Solmaz ◽  
Mehdi Sasani ◽  
Metin Vural ◽  
Ali Fahir Ozer
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Spinal Canal ◽  
Spinal Canal Stenosis ◽  
Lumbar Spinal Canal Stenosis ◽  
Resonance Imaging ◽  
Canal Stenosis ◽  
Lumbar Spinal Canal ◽  
Lumbar Spinal ◽  
Diagnostic Importance

scholarly journals Does functional evaluation and magnetic resonance imaging finding in a case of lumbar canal stenosis co-relate: a study of 50 cases

2017 ◽  
Vol 3 (4) ◽  
pp. 751
Author(s):  
Naushad Hussain ◽  
Nirmal Dhananjay Patil ◽  
Akash Shakya ◽  
Kalpesh Prakash Saindane
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Imaging Finding ◽  
Magnetic Resonance Imaging Finding ◽  
Functional Evaluation ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Lumbar Canal Stenosis ◽  
Canal Stenosis ◽  
Severity Of The Disease

<p class="abstract"><strong>Background:</strong> Lumbar canal stenosis is a clinical diagnosis. MRI is used many times for making the diagnosis. But does the severity of MRI findings co-relate with functional status?</p><p class="abstract"><strong>Methods:</strong> 50 cases of central lumbar canal stenosis were included in the study. The MRI findings and Oswestery Disability Index score were compared.<strong></strong></p><p class="abstract"><strong>Results:</strong> 50% of patients with severe ODI score had no Stenosis in the MRI. MRI findings do not co-relate with the functional severity of the disease (p=0.03).</p><p><strong>Conclusions:</strong> MRI and ODI score does not co-relate. This study reinforces the fact that one should always treat the patient and not the MRI. </p>

scholarly journals Magnetic resonance imaging in the diagnosis of lumbar canal stenosis in Indian patients

2014 ◽  
Vol 2 (1) ◽  
pp. 53
Author(s):  
Supreethi Kohli ◽  
Vinod Kumar ◽  
Seema Narang ◽  
Inder Pawar ◽  
Anu Singhal ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Lumbar Canal Stenosis ◽  
Canal Stenosis ◽  
Indian Patients

scholarly journals Preliminary Results of Relationship between Preoperative Walking Ability and Magnetic Resonance Imaging Morphology in Patients with Lumbar Canal Stenosis: Comparison between Trefoil and Triangle Types of Spinal Stenosis

2017 ◽  
Vol 11 (4) ◽  
pp. 580-585
Author(s):  
Parisa Azimi ◽  
Taravat Yazdanian ◽  
Edward C. Benzel
Keyword(s):  
Magnetic Resonance Imaging ◽  
Back Pain ◽  
Magnetic Resonance ◽  
Interobserver Reliability ◽  
Walking Ability ◽  
Resonance Imaging ◽  
Perfect Agreement ◽  
Duration Of Symptoms ◽  
Lumbar Canal Stenosis ◽  
Canal Stenosis

<sec><title>Study Design</title><p>Cross-sectional.</p></sec><sec><title>Purpose</title><p>To examine the relationship between magnetic resonance imaging (MRI) morphology stenosis grades and preoperative walking ability in patients with lumbar canal stenosis (LCS).</p></sec><sec><title>Overview of Literature</title><p>No previous study has analyzed the correlation between MRI morphology stenosis grades and walking ability in patients with LCS.</p></sec><sec><title>Methods</title><p>This prospective study included 98 consecutive patients with LCS who were candidates for surgery. Using features identified in T2-weighted axial magnetic, stenosis type was determined at the maximal stenosis level, and only trefoil and triangle stenosis grade types were considered because of sufficient sample size. Intraobserver and interobserver reliability were assessed by calculating weighted kappa coefficients. Symptom severity was evaluated via the Japanese Orthopedic Association Back Pain Evaluation Questionnaire (JOABPEQ). Walking ability was assessed using the Self-Paced Walking Test (SPWT) and JOABPEQ subscales. Demographic characteristics, SPWT scores, and JOABPEQ scores were compared between patients with trefoil and triangle stenosis types.</p></sec><sec><title>Results</title><p>The mean patient age was 58.1 (standard deviation, 8.4) years. The kappa values of the MRI morphology stenosis grade types showed a perfect agreement between the stenosis grade types. The trefoil group (n=53) and triangle group (n=45) showed similar preoperative JOABPEQ subscale scores (e.g., low back pain, lumbar function, and mental health) and were not significantly different in age, BMI, duration of symptoms, or lumbar stenosis levels (all <italic>p</italic>&gt;0.05); however, trefoil stenosis grade type was associated with a decreased walking ability according to the SPWT and JOABPEQ subscale scores.</p></sec><sec><title>Conclusions</title><p>These findings suggest preoperative walking ability is more profoundly affected in patients with trefoil type stenosis than in those with triangle type stenosis.</p></sec>

scholarly journals Magnetic Resonance Imaging Atlas-Based Volumetric Mapping of the Cervical Cord Gray Matter in Cervical Canal Stenosis

2020 ◽  
Vol 134 ◽  
pp. e497-e504
Author(s):  
Zachary A. Smith ◽  
Kenneth A. Weber ◽  
Monica Paliwal ◽  
Benjamin S. Hopkins ◽  
Alexander J. Barry ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Gray Matter ◽  
Cervical Cord ◽  
Cervical Canal ◽  
Resonance Imaging ◽  
Cervical Canal Stenosis ◽  
Canal Stenosis

X-RAY AND MAGNETIC RESONANCE IMAGING FEATURES IN PATIENTS WITH ACQUIRED LUMBAR SPINAL STENOSIS

2018 ◽  
Vol 8 (6) ◽  
pp. 151-156
Author(s):  
Trung Hoang Van ◽  
Cuong Le Van Ngoc
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Spinal Stenosis ◽  
Lumbar Spinal Stenosis ◽  
Spinal Canal ◽  
Resonance Imaging ◽  
X Ray ◽  
Canal Stenosis ◽  
Lumbar Spinal Canal ◽  
Lumbar Spinal

Background: Lumbar spinal stenosis often associates with chronic pain described the abnormal narrowing of the lumbar spinal canal, resulting in compression of neural elements within the central spinal canal or the lateral recesses or the root canals or coordinate with each other. The purpose of this study was to describe and compare the plain X-ray and magnetic resonance imaging features of lumbar canal stenosis. Materials and methods: This was a cross-sectional study of 78 patients with an acquired lumbar spinal canal between October 2017 and May 2018. Results: The X-rays confirmed osteophytes in 92.3%, endplate sclerosis in 88.5% and disc space narrowing 62.8%. On MRI, 213 lumbar levels were lumbar spinal canal stenosis, 181 lumbar levels were evaluated for the grade of central spinal canal stenosis. Conclusions: X-ray examination has limitations in a diagnosis of lumbar spinal stenosis but also serves as a diagnostic aid. MRI is well diagnosed as spinal pathology as well as lumbar spinal stenosis. Key words: Lumbar spinal, Lumbar spinal stenosis, Magnetic resonance imaging (MRI), X-ray, Grading

Circulatory dynamics of the cauda equina in lumbar canal stenosis using dynamic contrast-enhanced magnetic resonance imaging

2015 ◽  
Vol 15 (10) ◽  
pp. 2132-2141 ◽  
Author(s):  
Shigeru Kobayashi ◽  
Yoshihiko Suzuki ◽  
Adam Meir ◽  
Naji Al-Khudairi ◽  
Takashi Nakane ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Cauda Equina ◽  
Resonance Imaging ◽  
Lumbar Canal Stenosis ◽  
Dynamic Contrast Enhanced ◽  
Canal Stenosis ◽  
Contrast Enhanced ◽  
Circulatory Dynamics
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