Filters








747 Hits in 6.6 sec

An interactive segmentation tool for quantifying fat in lumbar muscles using axial lumbar-spine MRI

J. Antony, K. McGuinness, N. Welch, J. Coyle, A. Franklyn-Miller, N.E. O'Connor, K. Moran
2016 IRBM  
In this paper we present an interactive tool that can be used to quantify fat infiltration in lumbar muscles, which is useful in studying fat infiltration and lower back pain (LBP) in adults.  ...  Currently, a qualitative assessment by visual grading via a 5-point scale is used to study fat infiltration in lumbar muscles from an axial view of lumbar-spine MR Images.  ...  The proposed method of quantifying fat infiltration in the lumbar muscles is integrated in an interactive tool as a supporting system to the physicians to make better diagnosis as well as to check the  ... 
doi:10.1016/j.irbm.2015.10.004 fatcat:bratvjjxhzezlnf6dyyqyy5xx4

Manually defining regions of interest when quantifying paravertebral muscles fatty infiltration from axial magnetic resonance imaging: a proposed method for the lumbar spine with anatomical cross-reference

Rebecca J. Crawford, Jon Cornwall, Rebecca Abbott, James M. Elliott
2017 BMC Musculoskeletal Disorders  
Results: Our method for defining ROIs for lumbar paravertebral muscles on axial MRIs is outlined and discussed in relation to existing literature.  ...  We therefore propose and define a method as an option for use as a standardized MRI procedure for measuring lumbar paravertebral muscle composition, and to stimulate discussion towards establishing consensus  ...  Discussion This paper has proposed a foundational directive (method) for defining lumbar paravertebral ROI's for studies quantifying MFI from MRI images in the axial plane.  ... 
doi:10.1186/s12891-016-1378-z pmid:28103921 pmcid:PMC5247810 fatcat:n5pjxhrkazhhziqha62iwmskp4

Fat quantification in MRI-defined lumbar muscles

Joseph Antony, Kevin McGuinness, Neil Welch, Joe Coyle, Andy Franklyn-Miller, Noel E O Connor, Kieran Moran
2014 2014 4th International Conference on Image Processing Theory, Tools and Applications (IPTA)  
In this paper, we propose a method to precisely quantify the fat content / infiltration in a user-defined region of the lumbar muscles, which may aid better diagnosis.  ...  Some studies suggest fat infiltration in the lumbar muscles (LM) is associated with lower back pain (LBP) in adults.  ...  MR Lumbar spine images of two patients under study of low back pain and fat infiltration in lumbar spine muscles were considered for the analysis.  ... 
doi:10.1109/ipta.2014.7001983 dblp:conf/ipta/AntonyMWCFOM14 fatcat:sf3qfepyn5g3jhpoxcwhq6iyuu

Multiparametric MRI characterization of level dependent differences in lumbar muscle size, quality, and microstructure

David B. Berry, Ana E. Rodriguez-Soto, Erin K. Englund, Bahar Shahidi, Callan Parra, Lawrence R. Frank, Karen R. Kelly, Samuel R. Ward
2020 JOR Spine  
Magnetic resonance imaging (MRI) is a diagnostic tool that can be used to noninvasively assess lumbar muscle size and fatty infiltration, important biomarkers of muscle health.  ...  reversed in the lower lumbar spine. 3D reconstructions demonstrated accumulations of epimuscular fat in the anterior and posterior regions of the lumbar musculature, with minimal intramuscular fatty infiltration  ...  F I G U R E 1 1 Sample anatomical MRIs used for segmentation of the multifidus (red) and erector spinae (green). A, Segmentations were manually drawn in OsiriX in the axial plane.  ... 
doi:10.1002/jsp2.1079 pmid:32613159 pmcid:PMC7323468 fatcat:4s6vsuh7tjadhk2qfqa3aue3xy

Imaging Evaluation of Fat Infiltration in Paraspinal Muscles on MRI : A Systematic Review with a Focus on Methodology

Gengyu Han, Yu Jiang, Bo Zhang, Chunjie Gong, Weishi Li
2021 Orthopaedic Surgery  
Multi-segment measurement of FI at the lesion segment and adjacent segments could be a prognostic indicator for lumbar surgery.  ...  Having a good command of the methodology of paraspinal muscle FI on MRI was effective for diagnosis and prognosis in clinical practice.  ...  Antony et al. implemented an interactive segmentation of the erector spinae and the multifidus muscles using the livewire technique (Fig. 3A,B) 24 .  ... 
doi:10.1111/os.12962 pmid:33942525 pmcid:PMC8274185 fatcat:xxo6mnwnufdifggaqmfi4hkr6q

Texture Features of Proton Density Fat Fraction Maps from Chemical Shift Encoding-Based MRI Predict Paraspinal Muscle Strength

Michael Dieckmeyer, Stephanie Inhuber, Sarah Schlaeger, Dominik Weidlich, Muthu Rama Krishnan Mookiah, Karupppasamy Subburaj, Egon Burian, Nico Sollmann, Jan S. Kirschke, Dimitrios C. Karampinos, Thomas Baum
2021 Diagnostics  
We performed 3T-MRI of the lumbar spine in 26 healthy subjects (age = 30 ± 6 years; 15 females) using a six-echo 3D spoiled gradient echo sequence for chemical-shift-encoding-based water–fat separation  ...  Chemical-shift-encoding-based MRI (CSE-MRI)-derived proton density fat fraction (PDFF) of paraspinal muscles has been associated with various medical conditions including lumbar back pain (LBP) and neuromuscular  ...  An axially prescribed six-echo 3D spoiled gradient echo sequence was used for chemical shift encoding-based water-fat separation covering the lumbar spine.  ... 
doi:10.3390/diagnostics11020239 pmid:33557080 pmcid:PMC7913879 fatcat:4zodzpxbzbaydmcenacprgxkhy

The Association between Imaging Parameters of the Paraspinal Muscles, Spinal Degeneration, and Low Back Pain

Leonid Kalichman, Eli Carmeli, Ella Been
2017 BioMed Research International  
MR spectroscopy studies have corroborated that the lumbar multifidus in LBP subjects has a significantly higher fat content than asymptomatic controls.  ...  Fatty infiltration appears to be a late stage of muscular degeneration and can be measured noninvasively by an MRI scan.  ...  Phyllis Curchack Kornspan for her editorial services.  ... 
doi:10.1155/2017/2562957 pmid:28409152 pmcid:PMC5376928 fatcat:i742iljwfjadfhvtw5mjkwtyoe

Evaluation of an automated thresholding algorithm for the quantification of paraspinal muscle composition from MRI images

Maryse Fortin, Mona Omidyeganeh, Michele Crites Battié, Omair Ahmad, Hassan Rivaz
2017 BioMedical Engineering OnLine  
Methods: Magnetic resonance images of 30 patients with LBP were randomly selected cohort of patients participating in a project on commonly diagnosed lumbar pathologies in patients attending spine surgeon  ...  The imaging assessment of paraspinal muscle morphology and fatty infiltration has gained considerable attention in the past decades, with reports suggesting an association between muscle degenerative changes  ...  Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.  ... 
doi:10.1186/s12938-017-0350-y pmid:28532491 pmcid:PMC5441067 fatcat:chbgynib4ffzfaawufwnp6pciq

Does vertebral bone marrow fat content correlate with abdominal adipose tissue, lumbar spine bone mineral density, and blood biomarkers in women with type 2 diabetes mellitus?

Thomas Baum, Samuel P. Yap, Dimitrios C. Karampinos, Lorenzo Nardo, Daniel Kuo, Andrew J. Burghardt, Umesh B. Masharani, Ann V. Schwartz, Xiaojuan Li, Thomas M. Link
2011 Journal of Magnetic Resonance Imaging  
Purpose-To compare vertebral bone marrow fat content quantified with proton MR spectroscopy ( 1 H-MRS) with the volume of abdominal adipose tissue, lumbar spine volumetric bone mineral density (vBMD),  ...  Conclusion-This study demonstrated that vertebral bone marrow fat content correlates significantly with SAT adj , TAT adj , and lumbar spine vBMD in postmenopausal women with and without T2DM, but with  ...  Acknowledgments The authors thank Thelma Munoz and Melissa Guan for their help in recruiting and consenting the patients and John Kornak for his advisory function in the statistical analysis.  ... 
doi:10.1002/jmri.22757 pmid:22190287 pmcid:PMC3245661 fatcat:35b5c53gmzexbctp7svxi7bs4a

Association of Cervical and Lumbar Paraspinal Muscle Composition Using Texture Analysis of MR-Based Proton Density Fat Fraction Maps

Egon Burian, Edoardo A. Becherucci, Daniela Junker, Nico Sollmann, Tobias Greve, Hans Hauner, Claus Zimmer, Jan S. Kirschke, Dimitrios C. Karampinos, Karupppasamy Subburaj, Thomas Baum, Michael Dieckmeyer
2021 Diagnostics  
Using manual segmentations of the PDFF maps, texture analysis was performed and texture features were extracted.  ...  In this study, the associations of cervical and lumbar paraspinal musculature based on a texture analysis of proton density fat fraction (PDFF) maps were investigated to identify gender- and anatomical  ...  and lumbar spine, respectively.  ... 
doi:10.3390/diagnostics11101929 pmid:34679627 fatcat:qflcvhcsdvc7zdzoae7r25qnzy

Vertebral Bone Marrow Heterogeneity Using Texture Analysis of Chemical Shift Encoding-Based MRI: Variations in Age, Sex, and Anatomical Location

Michael Dieckmeyer, Daniela Junker, Stefan Ruschke, Muthu Rama Krishnan Mookiah, Karupppasamy Subburaj, Egon Burian, Nico Sollmann, Jan S. Kirschke, Dimitrios C. Karampinos, Thomas Baum
2020 Frontiers in Endocrinology  
A sagittal 8-echo 3D spoiled-gradient-echo sequence at 3T was used for CSE-MRI-based water-fat separation at the lumbar spine. Manual segmentation of vertebral bodies L1-4 was performed.  ...  Therefore, we investigated bone marrow heterogeneity of the lumbar spine using texture analysis of chemical-shift-encoding (CSE-MRI) based proton density fat fraction (PDFF) maps and its association with  ...  Furthermore, texture analysis has been reported as a reproducible tool for the quantitative assessment of fatty infiltration of paraspinal muscles in patients suffering from lumbar spinal stenosis based  ... 
doi:10.3389/fendo.2020.555931 pmid:33178134 pmcid:PMC7593641 fatcat:t7bh22dkbzhohfwy55scc7fntu

Development of quantification software for evaluating body composition contents and its clinical application in sarcopenic obesity

SeungJin Kim, Tae-Hoon Kim, Chang-Won Jeong, ChungSub Lee, SiHyeong Noh, Ji Eon Kim, Kwon-Ha Yoon
2020 Scientific Reports  
The variation in the muscle area (MA), subcutaneous fat area (SA), and visceral fat area (VA) was analyzed with an independent two sample T-test.  ...  In sarcopenic obesity, the importance of evaluating muscle and fat mass is unquestionable.  ...  In both genders, a single MRI scan at the level of the third lumbar spine (L3) is the best compromise as a site to assess total volume of visceral fat, subcutaneous fat and muscle 24 .  ... 
doi:10.1038/s41598-020-67461-0 pmid:32591563 fatcat:t446iytvp5dxrnxjsxbzaw5nfi

Imaging of lumbar degenerative disc disease

John A Carrino, William B Morrison
2003 Seminars in Spine Surgery  
GE sequences are used mostly in the cervical spine to generate rapid, high spatial resolution images over a smaller area but are not commonly used for lumbar spine imaging.  ...  However, a general-purpose protocol for lumbar spine imaging is commonly used (Table 1) .  ... 
doi:10.1053/s1040-7383(03)00070-4 fatcat:trqs24lmuzb3pasfacl6mfjyie

Toward a Routine Assessment of Visceral Adipose Tissue Volume from Computed Tomographic Data

Alexander Schaudinn, Andrea Hudak, Nicolas Linder, Martin Reinhardt, Gertraud Stocker, Florian Lordick, Timm Denecke, Harald Busse
2020 Obesity  
VVAT-T can be rapidly estimated by VAT segmentation of axial CT sections at sex-specific lumbar intervertebral disc spaces.  ...  Linear regression between AVAT and VVAT-T (reference) was used to determine approximate equations for VAT volume for all parameters (single sex, different anatomical landmarks or lumbar intervertebral  ...  Acknowledgments We would like to thank Roland Stange and Nikita Garnov for their extensive technical assistance with the software.  ... 
doi:10.1002/oby.23061 pmid:33369246 fatcat:rhlnsszz2zeqvk3cuic5qphlba

Quantitative imaging techniques for the assessment of osteoporosis and sarcopenia

Sara Guerri, Daniele Mercatelli, Maria Pilar Aparisi Gómez, Alessandro Napoli, Giuseppe Battista, Giuseppe Guglielmi, Alberto Bazzocchi
2018 Quantitative Imaging in Medicine and Surgery  
This paper presents the different imaging modalities currently used for the investigation of bone and muscle mass and quality in osteoporosis and sarcopenia with special emphasis on the clinical applications  ...  The increase in life expectancy in developed countries resulted in an increase of degenerative diseases affecting the musculoskeletal system.  ...  H-MRS is an interesting extension of diagnostic MRI that can be used not only to quantify MAT content but also to further investigate its composition (141, 142) .  ... 
doi:10.21037/qims.2018.01.05 pmid:29541624 pmcid:PMC5835658 fatcat:vmmcjp7i7nckddigie2xg4xvaq
« Previous Showing results 1 — 15 out of 747 results