scholarly journals Effects of axial loaded magnetic resonance imaging of lumbar spine on dural sac and lateral recesses

2021 ◽  
Author(s):  
Deniz Bulja ◽  
Jasna Strika ◽  
Merim Jusufbegović ◽  
Muris Bečirčić ◽  
Adnan Šehić ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Lumbar Spine ◽  
Magnetic Resonance ◽  
Axial Loading ◽  
Treatment Decision ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Dural Sac ◽  
Significant Difference ◽  
Before And After

Introduction: Axial-loaded magnetic resonance imaging (MRI), which can simulate an upright position of the patient may cause a significant reduction of the dural sac cross-sectional area (DCSA) compared with standard MRI, thus providing valuable information in the assessment of the lumbar spinal canal. The purpose of this study was to investigate excessiveness of the change in DCSA and depth of lateral recesses (DLRs) before and after axial-loaded imaging in relation to body mass index (BMI) of the subjects.Methods: Twenty patients were scanned to evaluate DCSA and DLR at three consecutive lumbar spine intervertebral disc levels (L3/4, L4/5, and L5/S1) on conventional-recumbent MRI, and after axial loading were applied.Results: Axial-loaded MRI demonstrates a significant difference of DSCA in comparison to conventional MRI. Furthermore, results show a significant correlation between the DCSA and BMI on level L3/L4, both before and after axial loading MRI. With axial loading, there is a reduction of DSCA of 12.2%, 12.1%, and 2.1% at the levels L3/L4, L4/L5, and L5/S1, respectively. After axial loading has been applied, the depth of the neural foramen has been reduced by an average of 10.1%.Conclusion: Axial-loaded MRI reduces DCSA and DLRs in comparison to standard MRI. Information obtained in this way may be useful to explain the patient’s symptomatology and may provide an additional insight that can influence the treatment decision plan accordingly.

Physiological pseudo-thickened cauda equina associated with dural sac dilatation on magnetic resonance imaging

2021 ◽  
pp. 197140092199897
Author(s):  
Satoshi Matsushima ◽  
Tetsuya Shimizu ◽  
Akira Baba ◽  
Hiroya Ojiri
Keyword(s):  
Magnetic Resonance Imaging ◽  
Lumbar Spine ◽  
Magnetic Resonance ◽  
Nerve Root ◽  
Cauda Equina ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Dural Sac ◽  
Pathological Conditions ◽  
Spine Magnetic Resonance Imaging

Objectives In daily clinical practice, the assessment of the thickness of the cauda equina on lumbar spine magnetic resonance imaging is an important parameter. However, its relevance to the size of the dural sac in non-pathological conditions is unknown. To examine the relationship between the size of the dural sac and the apparent thickness of the cauda equina nerve root using lumbar spine magnetic resonance imaging in non-pathological conditions. Methods We retrospectively measured the dural sac diameter and vertebral body diameter, counted the apparent number, and calculated total cross-sectional area of the cauda equina, dural sac ratio and the area of one apparent nerve root of cauda equina in 100 cases. Spearman's rank correlation coefficient ( ρ) was used. Results Dural sac ratio and diameter were positively correlated with the area of one apparent nerve root ( ρ=0.77, P<0.001; ρ=0.74, P<0.001; respectively) and negatively correlated with the apparent number of cauda equina in a single cross-section ( ρ=–0.63, P<0.001; ρ=–0.52, P<0.001; respectively). Conclusions A larger dural sac ratio and diameter was associated with an apparently thicker cauda equina and lower visible number. In a larger dural sac, the physiologically clumped and apparently thicker cauda equina should not be misdiagnosed as pathological.

Magnetic resonance imaging of the lumbar spine with axial loading: A review of 120 cases

2012 ◽  
Vol 81 (4) ◽  
pp. e561-e564 ◽  
Author(s):  
Andre Kinder ◽  
Fernando Palma Filho ◽  
Elisio Ribeiro ◽  
Romeu C. Domingues ◽  
Roberto C. Domingues ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Lumbar Spine ◽  
Magnetic Resonance ◽  
Axial Loading ◽  
Resonance Imaging

scholarly journals Upright Magnetic Resonance Imaging Study of Cervical Flexor/Extensor Musculature and Cervical Lordosis in Females After Helmet Wear

2021 ◽  
Vol 186 (Supplement_1) ◽  
pp. 632-638
Author(s):  
Hoon Choi ◽  
Vicky Varghese ◽  
Jamie Baisden ◽  
Diane W Braza ◽  
Anjishnu Banerjee ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Calculated Data ◽  
Imaging Study ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Significant Difference ◽  
Insignificant Difference ◽  
Upper Level ◽  
Military Helmet

ABSTRACT Introduction Addition of head-supported mass imparts greater demand on the human neck to maintain functionality. The same head-supported mass induces greater demand on the female spine than the male spine because female necks are comparatively slender. Prevalence of neck pain is greater in military than civilian population because of the head-borne mass (among other factors). The goal of this study is to determine quantifiable parameters related to muscle geometry using female human volunteers and upright magnetic resonance imaging. Materials and Methods Young healthy subjects were consented. Demographics and head–neck anthropometry were recorded. For all the 7 subjects, the T1- and T2-weighted magnetic resonance imaging in the neutral sitting position was obtained immediately following donning and after 4 hours of continuous wear of standard issued military helmet, while seated in the same posture for 4 hours. Cross-sectional areas of sternocleidomastoid and multifidus muscles from C2-C7, overall and segmental Cobb angles (C2-T1), and centroid and radius of each muscle were calculated. Data were compared with determine differences with the continuous helmet wear. Results There were level specific changes in morphological parameters for each of the muscles. Significant difference (P &lt; 0.05) in cross-sectional areas was noted at C2-3 level for sternocleidomastoid and at C3-4 and C5-6 levels for multifidus. For centroid angles, significant difference (P &lt; 0.05) was observed at C2-3 and C5-6 levels for sternocleidomastoid and at C3-4 level for multifidus. There was no significant difference (P &gt; 0.05) in muscle centroid radii between the pre- and posttest conditions. Conclusions Alterations in muscle geometries were muscle specific and level specific: sternocleidomastoid was significant at the upper level, whereas multifidus was significant at the mid-lower cervical spine segments. The insignificant difference in the Cobb angles was attributed to length of time of continuous helmet wear attributed and sample size. Helmet wear can lead to morphometric alterations in cervical flexor/extensor musculature in females.

Cross-sectional area of human trunk paraspinal muscles before and after posterior lumbar surgery using magnetic resonance imaging

2015 ◽  
Vol 25 (3) ◽  
pp. 774-782 ◽  
Author(s):  
Mohammad S. Ghiasi ◽  
Navid Arjmand ◽  
Aboulfazl Shirazi-Adl ◽  
Farzam Farahmand ◽  
Hassan Hashemi ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Cross Sectional Area ◽  
Lumbar Surgery ◽  
Sectional Area ◽  
Resonance Imaging ◽  
Paraspinal Muscles ◽  
Cross Sectional ◽  
Before And After

scholarly journals Magnetic Resonance Imaging Findings in Spondylodiscitis

2018 ◽  
Vol 15 (3) ◽  
pp. 217-221 ◽  
Author(s):  
Om Biju Panta ◽  
Yagya Raj Pathak ◽  
Dan Bahadur Karki
Keyword(s):  
Magnetic Resonance Imaging ◽  
Lumbar Spine ◽  
Magnetic Resonance ◽  
Thoracic Spine ◽  
Multimodality Imaging ◽  
Imaging Modality ◽  
High Sensitivity ◽  
Resonance Imaging ◽  
Significant Difference ◽  
The Mean

Background: Magnetic Resonance Imaging is the imaging modality of choice for imaging spinal infection due to its high sensitivity and specificity. This study aims to study the magnetic resonance imaging changes in patients with spondylodiscitis.Methods: The study was a retrospective study carried in a multimodality imaging centre in Kathmandu. Magnetic resonance imaging records and clinical record of 3 years duration were reviewed and patients with clinical and radiological diagnosis of spondylodiscitis were included in the study. Three radiologists interpreted Magnetic Resonance Imaging with mutual consensus in disputed issues. Data analysis was done with Statistical Package for Social Sciences21.0.Results: A total of 52 patients were included in the study. The mean age of the patients was 43.9 ± 17.6 years. Spondylodiscitis involved lumbar spine in 26(50%) case, cervical and thoracic spine in 13(25%) cases each. Multiple IV discs were involved in 24(46.2%) cases, which was most common in cervical spine and least common in thoracic spine. Only one vertebral end plate was involved in 16(30.8%) cases. Epidural collection was seen in 23(44.2%) cases and paravertebral collection was noted in 63(33.5%) cases. Statistical significant difference in region of spine involved (p=0.02) and epidural collection (p=0.04) was noted between genders.Conclusions: Lumbar spine was the most common level involved with spondylodiscitis, perivertebral enhancing soft tissue was present in all cases, and involvement of disc and the endplates were the most common pattern.

scholarly journals Prevalence of simple liver cysts and hemangiomas in cirrhotic and non-cirrhotic patients submitted to magnetic resonance imaging

2013 ◽  
Vol 46 (4) ◽  
pp. 203-208 ◽  
Author(s):  
Breno Victor Tomaz Galvão ◽  
Lucas Rios Torres ◽  
Patrícia Prando Cardia ◽  
Thiago Franchi Nunes ◽  
Priscila Silveira Salvadori ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Cross Sectional Study ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Liver Cysts ◽  
Significant Difference ◽  
Cirrhotic Patients ◽  
Incidental Lesions ◽  
Simple Liver Cysts

Objective To determine the prevalence of liver cysts and hemangiomas in the general population and in cirrhotic patients. Materials and Methods Retrospective, observational, and cross-sectional study selecting consecutive magnetic resonance imaging studies performed in the period from February to July 2011. A total of 303 patients (187 women and 116 men) with mean age of 53.3 years were included in the present study. Patients with previously known liver lesions were excluded. The images were consensually analyzed by two observers in the search for simple liver cysts and typical liver hemangiomas, according to universally accepted imaging criteria. Lesions prevalence, diameters and location were determined in both cirrhotic and non-cirrhotic individuals. Results The authors observed prevalence of 8.6% for hemangiomas and 14.5% for simple cysts. No statistically significant difference was observed in relation to prevalence of hemangiomas and cysts among cirrhotic and non-cirrhotic patients (p = 0.954; p = 0.472). Conclusion In the present study, the prevalence of cysts and hemangiomas was higher than the prevalence reported by autopsy series. No influence of cirrhosis was observed on the prevalence and appearance of such incidental lesions.

scholarly journals Dynamic Effects of Axial Loading on the Lumbar Spine During Magnetic Resonance Imaging in Patients with Suspected Spinal Stenosis

2008 ◽  
Vol 107 (4) ◽  
pp. 334-339 ◽  
Author(s):  
Yung-Cheng Wang ◽  
Chin-Ming Jeng ◽  
Chau-Ying Wu ◽  
Hsio-Yun Chang ◽  
Yong-Chien Huang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Lumbar Spine ◽  
Magnetic Resonance ◽  
Spinal Stenosis ◽  
Axial Loading ◽  
Resonance Imaging ◽  
Dynamic Effects
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