scholarly journals Can MRI quantify the volume changes of denervated facial muscles?

2020 ◽  
Vol 30 (1) ◽  
pp. 144-149 ◽  
Author(s):  
Valeria Mastryukova ◽  
Dirk Arnold ◽  
Daniel Güllmar ◽  
Orlando Guntinas-Lichius ◽  
Gerd Fabian Volk
Keyword(s):  
Magnetic Resonance ◽  
Facial Paralysis ◽  
Magnetic Resonance Images ◽  
Manual Segmentation ◽  
Facial Muscle ◽  
Resonance Imaging ◽  
Volume Changes ◽  
Time Points ◽  
Facial Muscles ◽  
Magnetic Resonance Imaging Mri

Could manual segmentation of magnetic resonance images be used to quantify the effects of transcutaneous electrostimulation and reinnervation of denervated facial muscle? Five patients with unilateral facial paralysis were scanned during the study while receiving a daily surface electrostimulation of the paralytic cheek region, but also after reinnervation. Their facial muscles were identified in 3D (coronal, sagittal, and axial) and segmented in magnetic resonance imaging (MRI) data for in total 28 time points over the 12 months of study. A non-significant trend of increasing muscle volume were detected after reinnervation. MRI is a valuable technique in the facial paralysis research.

Magnetic resonance imaging and computerized tomography scanning of herpes simplex encephalitis

1987 ◽  
Vol 67 (4) ◽  
pp. 592-594 ◽  
Author(s):  
Eric W. Neils ◽  
Robert Lukin ◽  
Thomas A. Tomsick ◽  
John M. Tew
Keyword(s):  
Magnetic Resonance Imaging ◽  
Herpes Simplex ◽  
Magnetic Resonance ◽  
Computerized Tomography ◽  
Herpes Simplex Encephalitis ◽  
Ct Scanning ◽  
Magnetic Resonance Images ◽  
Resonance Imaging ◽  
Content Type ◽  
Magnetic Resonance Imaging Mri

✓ The authors present two cases of herpes simplex encephalitis (HSE) in which computerized tomography (CT) scanning and magnetic resonance imaging (MRI) were performed. They also review the literature on the use of these imaging modalities in cases of HSE. The striking changes noted in these cases on T2-weighted magnetic resonance images in comparison to the CT findings suggest that MRI will help speed recognition of nonhemorrhagic HSE abnormalities.

Association of Cauda Equina Compression on Magnetic Resonance Images and Clinical Signs in Dogs With Degenerative Lumbosacral Stenosis

2002 ◽  
Vol 38 (6) ◽  
pp. 555-562 ◽  
Author(s):  
Philipp D. Mayhew ◽  
Amy S. Kapatkin ◽  
Jeffrey A. Wortman ◽  
Charles H. Vite
Keyword(s):  
Magnetic Resonance ◽  
Cauda Equina ◽  
Clinical Signs ◽  
Magnetic Resonance Images ◽  
Lumbosacral Spine ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Cauda Equina Compression ◽  
Magnetic Resonance Imaging Mri ◽  
Time Of Presentation

Magnetic resonance imaging (MRI) was used to examine the lumbosacral spine of 27 dogs with degenerative lumbosacral stenosis. Four normal dogs were also similarly imaged. Compression of the soft-tissue structures within the vertebral canal at the lumbosacral space was assessed in two ways: by measuring dorsoventral diameter on T1-weighted sagittal images and cross-sectional area on transverse images. The severity of the clinical signs was compared to the severity of cauda equina compression. No significant correlation was found. It is concluded that degree of compression as determined by MRI at time of presentation is independent of disease severity.

Clinical Significance of Magnetic Resonance Imaging in Preoperative Planning for Reconstruction of Posterior Tibial Tendon Ruptures

Foot & Ankle ◽  
1992 ◽  
Vol 13 (4) ◽  
pp. 208-214 ◽  
Author(s):  
Stephen Conti ◽  
James Michelson ◽  
Melvin Jahss
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Clinical Success ◽  
Magnetic Resonance Images ◽  
Posterior Tibial Tendon ◽  
Resonance Imaging ◽  
Posterior Tibial ◽  
Surgical Evaluation ◽  
Tendon Ruptures ◽  
Magnetic Resonance Imaging Mri

A retrospective study of attenuated/ruptured posterior tibial tendons was conducted of all patients who underwent tendon reconstruction over a 4-year period. The study comprised 20 feet in 19 patients having an average age of 53.3 years, with an average follow-up of 2 years. Preoperative magnetic resonance images were taken and graded for assignment to one of three magnetic resonance imaging (MRI)-based groups. The surgical grade was determined intraoperatively based on a previously described classification scheme. No medical or rheumatologic conditions predisposing to failure could be identified. Failure was defined as postoperative progression of pain and deformity which required subsequent triple arthrodesis. There were six failures at an average of 14.7 months. Surgical evaluation was not correlated to outcome following reconstruction. MRI grading, however, was predictive of outcome. The superior sensitivity of MRI for detecting intramural degeneration in the posterior tibial tendon that was not obvious at surgery may explain why MRI is better than intraoperative tendon inspection for predicting the outcome of reconstructive surgery. Therefore, it may be helpful to obtain preoperative MRI when this particular reconstruction of the posterior tibial tendon is contemplated, since this provides the best measure of tendon integrity and appears to be the best predictor of clinical success after such surgery.

Magnetic Resonance Images of Tendon Microstructure

2000 ◽  
Author(s):  
Rajakumar Israel ◽  
Theresa Atkinson
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Clinical Setting ◽  
Magnetic Resonance Images ◽  
New Method ◽  
Ligament Injury ◽  
Weak Signal ◽  
Resonance Imaging ◽  
Magnetic Resonance Imaging Mri

Abstract Tendon and ligament typically produce a weak signal during Magnetic Resonance Imaging (MRI). As a result only gross defects in the tissue could be detected. A method was recently developed to allow more detailed images of tendon structure to be obtained. This new method requires less than 2.5 minutes per scan and is therefore a reasonable method to utilize in a clinical setting to evaluate tendon or ligament injury and healing.

scholarly journals Temporal lobe volume changes in people at high risk of schizophrenia with psychotic symptoms

2002 ◽  
Vol 181 (02) ◽  
pp. 138-143 ◽  
Author(s):  
Stephen M. Lawrie ◽  
HeatherC. Whalley ◽  
Suheib S. Abukmeil ◽  
Julia N. Kestelman ◽  
Patrick Miller ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
High Risk ◽  
Magnetic Resonance ◽  
Temporal Lobe ◽  
Brain Structure ◽  
Psychotic Symptoms ◽  
Resonance Imaging ◽  
Volume Changes ◽  
Temporal Lobes ◽  
Magnetic Resonance Imaging Mri

BackgroundMagnetic resonance imaging (MRI) has demonstrated abnormalities of brain structure, particularly of the temporal lobes, in schizophrenia. These are thought to be neurodevelopmental in origin, but when they become evident is unknown.

Reactive Gliosis Simulating Butterfly Glioma: A Neuroradiological Case Study

Neurosurgery ◽  
1986 ◽  
Vol 19 (5) ◽  
pp. 816-819 ◽  
Author(s):  
Cazenave Craig ◽  
Reid Steven ◽  
Virapongse Chat ◽  
Hunter Stephen
Keyword(s):  
Magnetic Resonance ◽  
Malignant Neoplasm ◽  
Magnetic Resonance Images ◽  
Reactive Gliosis ◽  
Resonance Imaging ◽  
Computed Tomographic ◽  
Intractable Seizures ◽  
Computed Tomographic Scan ◽  
Magnetic Resonance Imaging Mri

Abstract Reactive gliosis was found in a 40-year-old man who presented with intractable seizures thought to be due to a malignant neoplasm. Although two separate lesions located bilaterally in the frontal lobes were evident on the computed tomographic scan, a connection between these lesions along the fibers of the corpus callosum was clearly demonstrated on T2-weighted magnetic resonance images. The unusual radiological appearance of this gliosis, which simulated a malignant butterfly glioma on magnetic resonance imaging (MRI), is reported. Because MRI is still a new modality, its images should be interpreted with judicious caution.

scholarly journals Machine Learning Approaches in Study of Multiple Sclerosis Disease Through Magnetic Resonance Images

2021 ◽  
Vol 12 ◽  
Author(s):  
Faezeh Moazami ◽  
Alain Lefevre-Utile ◽  
Costas Papaloukas ◽  
Vassili Soumelis
Keyword(s):  
Machine Learning ◽  
Magnetic Resonance ◽  
Clinical Manifestations ◽  
Magnetic Resonance Images ◽  
Learning Approaches ◽  
Resonance Imaging ◽  
Automated Diagnosis ◽  
Multiple Sclerosis Disease ◽  
Magnetic Resonance Imaging Mri ◽  
Applications Of Machine Learning

Multiple sclerosis (MS) is one of the most common autoimmune diseases which is commonly diagnosed and monitored using magnetic resonance imaging (MRI) with a combination of clinical manifestations. The purpose of this review is to highlight the main applications of Machine Learning (ML) models and their performance in the MS field using MRI. We reviewed the articles of the last decade and grouped them based on the applications of ML in MS using MRI data into four categories: 1) Automated diagnosis of MS, 2) Prediction of MS disease progression, 3) Differentiation of MS stages, 4) Differentiation of MS from similar disorders.

scholarly journals Non-invasive diagnostics in pathological fossils by magnetic resonance imaging

2005 ◽  
Vol 2 (2) ◽  
pp. 239-260 ◽  
Author(s):  
D. Mietchen ◽  
H. Keupp ◽  
B. Manz ◽  
F. Volke
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissue ◽  
Magnetic Resonance Images ◽  
Clinical Diagnostics ◽  
Resonance Imaging ◽  
Physiological Processes ◽  
Magnetic Resonance Imaging Mri ◽  
Invasive Diagnostics

Abstract. For more than a decade, Magnetic Resonance Imaging (MRI) has been routinely employed in clinical diagnostics because it allows to non-invasively study anatomical structures and physiological processes in vivo and to differentiate between healthy and pathological states, particularly in soft tissue. Here, we demonstrate that MRI can likewise be applied to fossilized biological samples and help in elucidating paleopathological and paleoecological questions: Five anomalous guards of Jurassic and Cretaceous belemnites are presented along with putative paleopathological scenarios directly derived from 3D Magnetic Resonance images with microscopic resolution. These syn vivo deformities of both the mineralized internal rostrum and the surrounding former soft tissue can be traced back in part to traumatic events of predator-prey-interactions, and partly to parasitism. Evidence is presented that the frequently observed anomalous apical collar might be indicative of an inflammatory disease. Finally, the potential of Magnetic Resonance techniques for further paleontological applications is being discussed.

The Use of Magnetic Resonance Imaging with High-Resolution CT in the Evaluation of Facial Paralysis

1989 ◽  
Vol 101 (4) ◽  
pp. 449-458 ◽  
Author(s):  
Mitchell K. Schwaber ◽  
David Zealear ◽  
James L. Netterville ◽  
Michael Seshul ◽  
Robert H. Ossoff
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Facial Nerve ◽  
Facial Paralysis ◽  
Case Reports ◽  
Resonance Imaging ◽  
High Resolution Computed Tomography ◽  
Magnetic Resonance Imaging Mri ◽  
The Brain

Magnetic resonance imaging (MRI) has been widely used in the evaluation of suspected acoustic neuroma, but has not received the same attention with respect to facial paralysis. High-resolution computed tomography (HRCT) has been the radiologic test of choice to evaluate the facial nerve. The necessary HRCT projections, slices, and enhancement techniques to visualize each segment have been outlined. We have developed a radiologic protocol that uses MRI in conjunction with HRCT, applying the strengths of each to evaluate the facial nerve. We have evaluated 15 patients and have found that MRI is the better study to evaluate the brain stem/cerebellopontine angle segment of the facial nerve and better evaluates bone-soft tissue Interfaces. HRCT is better in the evaluation of the intratemporal segment of the facial nerve and the assessment of the anatomic perspectives of a lesion within the temporal bone. The results are discussed and case reports Illustrate the efficacy of this approach.

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