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Shoulder MRI
 
MRI of the shoulder with its excellent soft tissue discrimination, and high spatial resolution offers the best noninvasive way to study the shoulder. MRI images of the bone, muscles and tendons of the glenohumeral joint can be obtained in any oblique planes and projections. MRI gives excellent depiction of rotator cuff tears, injuries to the biceps tendon and damage to the glenoid labrum. Shoulder MRI is better than ultrasound imaging at depicting structural changes such as osteophytic spurs, ligament thickening, and acromial shape that may have predisposed to tendon degeneration.
A dedicated shoulder coil and careful patient positioning in external rotation with the shoulder as close as reasonably possible to the center of the magnet is necessary for a good image quality. If possible, the opposite shoulder should be lifted up, so that the patient lies on the imaged shoulder in order to rotate and fix this shoulder to reduce motion during breathing.
Axial, coronal oblique, and sagittal oblique proton density with fat suppression, T2 and T1 provide an assessment of the rotator cuff, biceps, deltoid, acromio-clavicular joint, the glenohumeral joint and surrounding large structures. If a labral injury is suspected, a Fat Sat gradient echo sequence is recommended. In some cases, a direct MR shoulder arthrogram with intra-articular injection of dilute gadolinium or an indirect arthrogram with imaging 20 min. after intravenous injection may be helpful.
See also Imaging of the Extremities.
 
Images, Movies, Sliders:
 Anatomic Imaging of the Shoulder  Open this link in a new window
      

Courtesy of  Robert R. Edelman

 
Radiology-tip.comArthrography
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Radiology-tip.comLow Intensity Pulsed Ultrasound,  Musculoskeletal and Joint Ultrasound
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• Related Searches:
    • Fat Suppression
    • Imaging of the Extremities
    • MRI Procedure
    • Knee MRI
    • Magnetic Resonance Imaging MRI
 
Further Reading:
  Basics:
MRI of little value in shoulder pain
Tuesday, 29 October 2013   by www.rheumatologyupdate.com.au    
  News & More:
MRI costs wide-ranging
Thursday, 14 April 2011   by www.chieftain.com    
MRE Could Provide A Definitive Diagnosis For People With Muscle Pain, Study Shows
Friday, 30 November 2007   by www.sciencedaily.com    
Peer-Reviewed Study Concludes The FONAR UPRIGHT™ MRI Could Serve as the “Standard Procedure of Care” for Pediatric Shoulder Malady
Wednesday, 30 May 2007   by www.fonar.com    
Shoulder pain? Don't rush to get an MRI
Thursday, 10 October 2013   by bangordailynews.com    
Searchterm 'Shoulder MRI' was also found in the following service: 
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Radiology  (1) Open this link in a new window
Imaging of the ExtremitiesMRI Resource Directory:
 - Musculoskeletal and Joint MRI -
 
Knee and shoulder MRI exams are the most commonly requested musculoskeletal MRI scans. Other MR imaging of the extremities includes hips, ankles, elbows, and wrists. Orthopedic imaging requires very high spatial resolution for reliable small structure definition and therefore places extremely high demands on SNR.
Exact presentation of joint pathology expects robust and reliable fat suppression, often under difficult conditions like off-center FOV, imaging at the edge of the field homogeneity or in regions with complex magnetic susceptibility.
MR examinations can evaluate meniscal dislocations, muscle fiber tears, tendon disruptions, tendinitis, and diagnose bone tumors and soft tissue masses. MR can also demonstrate acute fractures that are radiographically impossible to see. Evaluation of articular cartilage for traumatic injury or assessment of degenerative disease represents an imaging challenge, which can be overcome by high field MRI applications. Currently, fat-suppressed 3D spoiled gradient echo sequences and density weighted fast spin echo sequences are the gold-standard techniques used to assess articular cartilage.
Open MRI procedures allow the kinematic imaging of joints, which provides added value to any musculoskeletal MRI practice. This technique demonstrates the actual functional impingements or positional subluxations of joints. In knee MRI examinations, the kinematical patellar study can show patellofemoral joint abnormalities.
See also Open MRI, Knee MRI, Low Field MRI.
 
Images, Movies, Sliders:
 MRI - Anatomic Imaging of the Foot  Open this link in a new window
    
SlidersSliders Overview

 Anatomic Imaging of the Shoulder  Open this link in a new window
      

Courtesy of  Robert R. Edelman

 MRI - Anatomic Imaging of the Ankle 2  Open this link in a new window
    
SlidersSliders Overview

 Anatomic MRI of the Knee 1  Open this link in a new window
    
SlidersSliders Overview

 
Radiology-tip.comJoint Scintigraphy,  Arthrography
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Radiology-tip.comSonography,  Musculoskeletal and Joint Ultrasound
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• View the DATABASE results for 'Imaging of the Extremities' (5).Open this link in a new window

 
Further Reading:
  Basics:
Optimizing Musculoskeletal MR
   by rad.usuhs.mil    
VALUE OF 3D T1W & STIR MRI SEQUENCES IN DIAGNOSING EROSIONS IN RHEUMATOID ARTHRITIS
   by www.bocaradiology.com    
Comparison of New Methods for Magnetic Resonance Imaging of Articular Cartilage(.pdf)
2002
  News & More:
MRI technique allows study of wrist in motion
Monday, 6 January 2014   by www.healthimaging.com    
Study: MRA bests MRI in evaluation of wrist tears
Saturday, 12 May 2012   by www.healthimaging.com    
Musculoskeletal MRI at 3.0 T: Relaxation Times and Image Contrast
Sunday, 1 August 2004   by www.ajronline.org    
MRI Resources 
Fluorescence - Service and Support - Colonography - Crystallography - Cochlear Implant - Movies
 
Opera (E-SCAN™ XQ)InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.esaote.com/products/MRI/eScanXQ/products1.htm

Manufactured by Esaote S.p.A.; a low field open MRI scanner with permanent magnet for orthopedic use. The outstanding feature of this MRI system is a patient friendly design with 24 cm diameter, which allows the imaging of extremities and small body parts like shoulder MRI. The power consumption is around 1.3 kW and the needed minimum floor space is an area of 16 sq m.
At RSNA 2006 Hologic Inc. introduced a new dedicated extremity MRI scanner, the Opera. Manufactured by Esaote is the Opera a redesign of Esaote’s 0.2 Tesla E-Scan XQ platform, which now enables complete imaging of all extremities, including hip and shoulder applications. 'Real-time positioning' reportedly speeds patient setup and reduces exam times.
Esaote North America and Hologic Inc are the U.S. distributors of this MRI device.


Device Information and Specification
CLINICAL APPLICATION Dedicated extremity
CONFIGURATION Open MRI
SURFACE COILS Extremity, shoulder (2), flex coil, knee dual phased array, ankle//foot dual phased array, hand//wrist dual phased array coil
PULSE SEQUENCES SE, GE, IR, STIR, FSE, 3D CE, GE-STIR, 3D GE, ME, TME, HSE
IMAGING MODES Single, multislice, volume study, fast scan, multi slab
TR 10 - 5000 msec
TE 6 - 110 msec
SINGLE SLICE 0.6 sec/image
MULTISLICE 0.6 sec/image
FOV 17 cm
SLICE THICKNESS 2D: 2 mm - 10 mm;
3D: 0.6 mm - 10 mm
DISPLAY MATRIX 512 x 512
MEASURING MATRIX 256 x 256 maximum
PIXEL INTENSITY 4096 gray lvls, 256 lvls in 3D
SPATIAL RESOLUTION 0.4 mm
MAGNET TYPE Permanent
BORE DIAMETER
or W x H
24 cm H, open
MAGNET WEIGHT 2250 kg, 4960 lbs
H*W*D 79 x 65 x 85 cm
POWER REQUIREMENTS 2,0 kW; 110/220 V single phase
FIELD STRENGTH 0.2 T
STRENGTH 20 mT/m
5-GAUSS FRINGE FIELD, radial/axial 150 cm/130 cm
SHIMMING Passive

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• View the DATABASE results for 'Opera (E-SCAN™ XQ)' (2).Open this link in a new window

 
Further Reading:
  News & More:
E-Scan, 510(k) Summary(.pdf)
Saturday, 15 May 2004   by www.accessdata.fda.gov    
Searchterm 'Shoulder MRI' was also found in the following services: 
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Spectral Selection Attenuated Inversion RecoveryInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.
 
(SPAIR) The MRI fat suppression technique SPAIR is characterized by a low sensitivity to RF field inhomogeneities. The used adiabatic radio frequency pulses for spectral saturation ensure a high uniformity and lower specific absorption rate (SAR).
SPAIR is suitable for offset and difficult to suppress regions such as liver, pelvis, shoulder and hips.
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Searchterm 'Shoulder MRI' was also found in the following service: 
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Radiology  (1) Open this link in a new window
Cervical Spine MRI
 
Cervical spine MRI is a suitable tool in the assessment of all cervical spine (vertebrae C1 - C7) segments (computed tomography (CT) images may be unsatisfactory close to the thoracic spine due to shoulder artifacts). The cervical spine is particularly susceptible to degenerative problems caused by the complex anatomy and its large range of motion.
Advantages of magnetic resonance imaging MRI are the high soft tissue contrast (particularly important in diagnostics of the spinal cord), the ability to display the entire spine in sagittal views and the capacity of 3D visualization. Magnetic resonance myelography is a useful supplement to conventional MRI examinations in the investigation of cervical stenosis. Myelographic sequences result in MR images with high contrast that are similar in appearance to conventional myelograms. Additionally, open MRI studies provide the possibility of weight-bearing MRI scan to evaluate structural positional and kinetic changes of the cervical spine.
Indications of cervical spine MRI scans include the assessment of soft disc herniations, suspicion of disc hernia recurrence after operation, cervical spondylosis, osteophytes, joint arthrosis, spinal canal lesions (tumors, multiple sclerosis, etc.), bone diseases (infection, inflammation, tumoral infiltration) and paravertebral spaces.
State-of-the-art phased array spine coils and high performance MRI machines provide high image quality and short scan time. Imaging protocols for the cervical spine includes sagittal T1 weighted and T2 weighted sequences with 3-4 mm slice thickness and axial slices; usually contiguous from C2 through T1. Additionally, T2 fat suppressed and T1 post contrast images are often useful in spine imaging.
See also Lumbar Spine MRI.
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• View the DATABASE results for 'Cervical Spine MRI' (2).Open this link in a new window


• View the NEWS results for 'Cervical Spine MRI' (1).Open this link in a new window.
 
Further Reading:
  News & More:
Pre-Op MRI Predicts Outcome of Cervical Spondylotic Myelopathy
Wednesday, 19 June 2013   by www.doctorslounge.com    
Imaging Technique for Spinal Cord Injury Shows Promise
Sunday, 22 December 2013   by www.wauwatosanow.com    
In Vivo 3-D Cervical Spine Kinematics Demonstrated
Thursday, 19 May 2011   by www.doctorslounge.com    
MRI Images at a 45-Degree Angle Through The Cervic al Neural Forami na:A Technique For Improved Visualization(.pdf)
2006   by www.painphysicianjournal.com    
MRI Resources 
Crystallography - General - Pediatric and Fetal MRI - Safety pool - Examinations - Collections
 
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