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Muscle volume MRI

Jun Ho Kim, Yeo Ju Kim, Sung Hye Koh, Bom Soo Kim, Sun Young Choi, Seong Eun Cho, Joon Ho Song, Chang-Hwan Kim, Kyung Hee Lee, Soon Gu Cho
The objective is to evaluate the magnetic resonance imaging (MRI) findings in rhabdomyolysis in detail and determine their correlation with the development of peripheral neuropathy.Magnetic resonance images for 23 patients with confirmed rhabdomyolysis with (n = 11) or without (n = 12) peripheral neuropathy were retrospectively reviewed for the signal intensity on T1- and T2-weighted images, intramuscular hemorrhage, enhancement pattern, shape and margin in the longitudinal plane, edema in the deep fascia and overlying subcutaneous layer, multiplicity, and bilateral limb involvement...
August 2018: Medicine (Baltimore)
Martin Schwartz, Petros Martirosian, Günter Steidle, Michael Erb, Alto Stemmer, Bin Yang, Fritz Schick
The purpose of this work was assessment of volumetric characteristics of spontaneous mechanical activities in musculature (SMAMs) by diffusion-weighted simultaneous multi-slice (DW-SMS) imaging and spatial correlation to anatomical structure, as revealed by fusion to fiber tractographic information derived from diffusion-tensor imaging (DTI). The feasibility of using DW-SMS to image spontaneous events in human musculature was assessed by phantom measurements. Series of DW-SMS images and DTI datasets were recorded from the resting calf of three human subjects...
August 1, 2018: NMR in Biomedicine
Sarah L Pownder, Brian G Caserto, Kei Hayashi, Mary Lou Norman, Hollis G Potter, Matthew F Koff
OBJECTIVE To characterize the MRI and histologic features of the supraspinatus tendon in nonlame dogs. ANIMALS 7 cadavers (14 shoulder joints) of nonlame 2-year-old sexually intact male Beagles. PROCEDURES Multiple MRI fluid-sensitive pulse sequences were obtained for both shoulder joints of each cadaver, and the thickness, volume, and signal intensity of each supraspinatus tendon were assessed. After MRI scanning was complete, the shoulder joints were processed for histologic examination. Tissue specimens were stained with various stains to determine tendon morphology and composition...
August 2018: American Journal of Veterinary Research
I Vanmechelen, A Shortland, J Noble
BACKGROUND: Deficits in muscle volume may be a significant contributor to physical disability in young people with cerebral palsy. However, 3D measurements of muscle volume using MRI or 3D ultrasound may be difficult to make routinely in the clinic. We wished to establish whether accurate estimates of muscle volume could be made from a combination of anatomical cross-sectional area and length measurements in samples of typically developing young people and young people with bilateral cerebral palsy...
July 24, 2018: Gait & Posture
Andrew D Davis
Adequate blood circulation to muscles is important for good health. In recent years, researchers have increasingly used magnetic resonance imaging (MRI) to study temporal skeletal muscle physiological changes using gradient echo (GRE) echo planar imaging (EPI). These studies, typically involving exercise or ischemic challenges, have differentiated healthy subjects from athletic or unhealthy populations, such as those with peripheral vascular disease. The T*2-weighted GRE EPI signal is sensitive to changes in blood flow and oxygenation in muscle...
2018: Critical Reviews in Biomedical Engineering
Monika L Bayer, Maren Hoegberget-Kalisz, Mikkel H Jensen, Jens L Olesen, Rene B Svensson, Christian Couppé, Mikael Boesen, Janus D Nybing, Engin Y Kurt, S Peter Magnusson, Michael Kjaer
Muscle strain injuries disrupt the muscle-tendon unit, early rehabilitation is associated with a faster return to sports (RTS), but the time course of tissue healing remains sparsely described. The purpose was to examine tissue regeneration and the effectiveness of early versus delayed rehabilitation onset on functional and structural recovery after strain injuries. 50 recreational athletes with a severe acute strain injury in their thigh or calf muscles were randomized to early or delayed rehabilitation onset...
July 25, 2018: Scandinavian Journal of Medicine & Science in Sports
Pavel A Novikov, Maria A Nazarova, Vadim V Nikulin
The use of the MRI-navigation system ensures accurate targeting of TMS. This, in turn, results in TMS motor mapping becoming a routinely used procedure in neuroscience and neurosurgery. However, currently, there is no standardized methodology for assessment of TMS motor-mapping results. Therefore, we developed TMSmap-free standalone graphical interface software for the quantitative analysis of the TMS motor mapping results ( In addition to the estimation of standard parameters (such as the size of cortical muscle representation and the center of gravity location), it allows estimation of the volume of cortical representations, excitability profile of the cortical surface map, and the overlap between cortical representations...
2018: Frontiers in Human Neuroscience
Ludovico M Garau, Daniele Guerrieri, Flaminia De Cristofaro, Alice Bruscolini, Giuseppe Panzironi
Background: Current magnetic resonance imaging (MRI) techniques for measuring extraocular muscle (EOM) volume enlargement are not ideally suited for routine follow-up of Graves' ophthalmopathy (GO) because the difficulty of segmenting the muscles at the tendon insertion complicates and lengthens the study protocol. Purpose: To measure the EOM sampled volume (SV) and assess its correlation with proptosis. Material and Methods: A total of 37 patients with newly diagnosed GO underwent 3-T MRI scanning with iterative decomposition of water and fat (IDEAL) sequences with and without contrast enhancement...
June 2018: Acta Radiologica Open
Magnus Borga
MRI is becoming more frequently used in studies involving measurements of adipose tissue and volume and composition of skeletal muscles. The large amount of data generated by MRI calls for automated analysis methods. This review article presents a summary of automated and semi-automated techniques published between 2013 and 2017. Technical aspects and clinical applications for MRI-based adipose tissue and muscle composition analysis are discussed based on recently published studies. The conclusion is that very few clinical studies have used highly automated analysis methods, despite the rapidly increasing use of MRI for body composition analysis...
July 24, 2018: British Journal of Radiology
Christian A Pitcher, Catherine M Elliott, Jane P Valentine, Katherine Stannage, Sian A Williams, Peter J Shipman, Siobhán L Reid
INTRODUCTION: This study aims to determine the lower limb morphological characteristics of skeletal muscle of ambulant children with spastic cerebral palsy (CP) and typically developing (TD) children. METHODS: Seventeen children with spastic diplegic CP (10 males, 5-12 years, Gross Motor Function Classification System (GMFCS) I & II) and 19 TD children (8 males, 5-11 years) underwent lower limb T1 -weighted MRI. Morphological characteristics of the triceps surae including muscle volume, anatomical cross-sectional area, muscle length and subcutaneous adipose tissue were digitally quantified, and the proportional distribution calculated...
July 7, 2018: Muscle & Nerve
Rafael Menezes-Reis, Gustavo Perazzoli Bonugli, Carlos Ernesto Garrido Salmon, Debora Mazoroski, Carlos Fernando Pereira da Silva Herrero, Marcello Henrique Nogueira-Barbosa
Fat infiltration and atrophy of lumbar muscles are related to spinal degenerative conditions and may cause functional deficits. Spinal alignment exerts biomechanical influence on lumbar intervertebral discs and joints. Our objective was to evaluate if spinopelvic parameters correlate with the lumbar muscle volume and fat infiltration. This is an observational, prospective and cross-sectional study. Ninety-three asymptomatic adult aged 20-40 years were included. Lumbar lordosis (LL), thoracic kyphosis (TK), pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), thoracolumbar alignment (TL), sagittal vertical axis (SVA), C2-pelvic angle (CPA), spinosacral angle (SSA), lack of lordosis (PI-LL), L1S1 and T1S1 length were measured on panoramic spine radiographs...
2018: PloS One
Mariana Masteling, James A Ashton-Miller, John O L DeLancey
INTRODUCTION AND HYPOTHESIS: Measurements of the anatomic cross-sectional area (CSA) of the pubovisceral muscle (PVM) in women are confounded by the difficulty of separating the muscle from the adjacent puborectal (PRM) and iliococcygeal (ICM) muscles when visualized in a plane orthogonal to the fiber direction. We tested the hypothesis that it might be possible to measure the PVM CSA within a defined region of interest based on magnetic resonance images (MRI). METHODS: MRI scans of 11 women with unilateral PVM tears and seven primiparous women with intact muscles following elective C-section were used to identify the PVM injury zone defined by the mean location of its boundaries with the adjacent intact PRM and ICM from existing anatomic reference points using 3D Slicer and ImageJ software...
July 5, 2018: International Urogynecology Journal
Huu-Giao Nguyen, Raphael Sznitman, Philippe Maeder, Ann Schalenbourg, Marta Peroni, Jan Hrbacek, Damien C Weber, Alessia Pica, Meritxell Bach Cuadra
PURPOSE: We present a 3-dimensional patient-specific eye model from magnetic resonance imaging (MRI) for proton therapy treatment planning of uveal melanoma (UM). During MRI acquisition of UM patients, the point fixation can be difficult and, together with physiological blinking, can introduce motion artifacts in the images, thus challenging the model creation. Furthermore, the unclear boundary of the small objects (eg, lens, optic nerve) near the muscle or of the tumors with hemorrhage and tantalum clips can limit model accuracy...
May 14, 2018: International Journal of Radiation Oncology, Biology, Physics
Frédéric Dierick, Ekaterina Galtsova, Clara Lauer, Fabien Buisseret, Anne-France Bouché, Laurent Martin
PURPOSE: This study evaluates the impact of a 3-week period of intensive pelvic floor muscles training (PFMT), with or without instrumentation, on clinical and static magnetic resonance imaging (MRI) changes of puborectalis (PR) and iliococcygeus (IL) muscles. METHODS: 24 healthy young women were enrolled in the study and 17 achieved the 9 sessions of 30 min training exercises and conducted all assessments. Participants were randomly assigned in two training groups: voluntary contractions combined with hypopressive exercises (HYPO) or biofeedback exercises combined with transvaginal electrical stimulations (ELEC)...
August 2018: European Journal of Applied Physiology
Julian A Luetkens, Sabine Klein, Frank Träber, Frederic C Schmeel, Alois M Sprinkart, Daniel L R Kuetting, Wolfgang Block, Frank E Uschner, Robert Schierwagen, Kanishka Hittatiya, Glen Kristiansen, Juergen Gieseke, Hans H Schild, Jonel Trebicka, Guido M Kukuk
Purpose To evaluate MRI T1 and T2 mapping with calculation of extracellular volume (ECV) for diagnosis and grading of liver fibrosis. Materials and Methods Different grades of fibrosis were induced in 60 male Sprague-Dawley rats by bile duct ligation (BDL) and carbon-tetrachloride (CCl4 ) intoxication. Portal pressure was measured invasively, whereas hepatic fibrosis was quantified by hydroxyproline content, Sirius red staining, and α smooth muscle actin staining. T1 values, T2 values, and ECV were assessed by using quantitative MRI mapping techniques...
June 26, 2018: Radiology
Tonia L Vincent, Angus K T Wann
The articular cartilage is exquisitely sensitive to mechanical load. Its structure is largely defined by the mechanical environment and destruction in osteoarthritis is the pathophysiological consequence of abnormal mechanics. It is often overlooked that disuse of joints causes profound loss of volume in the articular cartilage, a clinical observation first described in polio patients and stroke victims. Through the 1980s, the results of studies exploiting experimental joint immobilisation supported this. Importantly, this substantial body of work was also the first to describe metabolic changes that resulted in decreased synthesis of matrix molecules, especially sulfated proteoglycans...
June 19, 2018: Journal of Physiology
Sarah Schlaeger, Friedemann Freitag, Elisabeth Klupp, Michael Dieckmeyer, Dominik Weidlich, Stephanie Inhuber, Marcus Deschauer, Benedikt Schoser, Sarah Bublitz, Federica Montagnese, Claus Zimmer, Ernst J Rummeny, Dimitrios C Karampinos, Jan S Kirschke, Thomas Baum
Magnetic resonance imaging (MRI) can non-invasively assess muscle anatomy, exercise effects and pathologies with different underlying causes such as neuromuscular diseases (NMD). Quantitative MRI including fat fraction mapping using chemical shift encoding-based water-fat MRI has emerged for reliable determination of muscle volume and fat composition. The data analysis of water-fat images requires segmentation of the different muscles which has been mainly performed manually in the past and is a very time consuming process, currently limiting the clinical applicability...
2018: PloS One
Malihe-Sadat Poormasjedi-Meibod, Maral Mansouri, Mary Fossey, Jordan W Squair, Jie Liu, John H McNeill, Christopher R West
Spinal cord injury (SCI) causes autonomic dysfunction, altered neurohumoral control, profound hemodynamic changes, and an increased risk of heart disease. In this prospective study we investigated the cardiac consequences of chronic experimental SCI in rats by combining cutting edge in vivo techniques (magnetic resonance imaging (MRI) and left-ventricular (LV) pressure-volume catheterization) with histological and molecular assessments. 12 weeks post-SCI, MRI-derived structural indices and in vivo LV catheterization derived functional indices indicated the presence of LV atrophy (LV mass in Control vs...
June 7, 2018: Journal of Neurotrauma
E E Sigmund, S H Baete, T Luo, K Patel, D Wang, I Rossi, A Duarte, M Bruno, D Mossa, A Femia, S Ramachandran, D Stoffel, J S Babb, A G Franks, J Bencardino
INTRODUCTION: Dermatomyositis (DM) is an idiopathic inflammatory myopathy involving severe debilitation in need of diagnostics. We evaluated the proximal lower extremity musculature with diffusion tensor imaging (DTI), intravoxel incoherent motion (IVIM) and dynamic DTI in DM patients and controls and compared with standard clinical workup.  METHODS: In this IRB-approved, HIPAA-compliant study with written informed consent, anatomical, Dixon fat/water and diffusion imaging were collected in bilateral thigh MRI of 22 controls and 27 DM patients in a 3T scanner...
June 4, 2018: European Radiology
Sungwon Kim, Kyunghwa Han, Nieun Seo, Hye Jin Kim, Myeong-Jin Kim, Woong Sub Koom, Joong Bae Ahn, Joon Seok Lim
OBJECTIVES: To evaluate the diagnostic value of signal intensity (SI)-selected volumetry findings in T2-weighted magnetic resonance imaging (MRI) as a potential biomarker for predicting pathological complete response (pCR) to preoperative chemoradiotherapy (CRT) in patients with rectal cancer. METHODS: Forty consecutive patients with pCR after preoperative CRT were compared with 80 age- and sex-matched non-pCR patients in a case-control study. SI-selected tumor volume was measured on post-CRT T2-weighted MRI, which included voxels of the treated tumor exceeding the SI (obturator internus muscle SI + [ischiorectal fossa fat SI - obturator internus muscle SI] × 0...
June 1, 2018: European Radiology
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