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Oblique
 
A plane or section not perpendicular to the xyz coordinate system, such as long and short axis views of the heart.
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• Related Searches:
    • Lumbar Spine MRI
    • Orientation
    • Slice Select Gradient
    • Spine MRI
    • Slice Overlap Artifact
 
Further Reading:
  Basics:
Additional oblique MRI improved diagnosis of ACL tears
Friday, 7 June 2013   by www.healio.com    
Searchterm 'Oblique' was also found in the following services: 
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Radiology  (8) Open this link in a new windowUltrasound  (6) Open this link in a new window
Oblique Imaging
 
Oblique imaging generates images along oblique orientations between the conventional planes.
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Further Reading:
  Basics:
Magnetic resonance imaging
   by www.scholarpedia.org    
  News & More:
Cutting Edge Imaging of THE Spine
February 2007   by www.pubmedcentral.nih.gov    
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Multi Angle Oblique
 
The multi angle oblique technique gives the ability to display anatomical structures in a variety of planes from the data acquired in just one MRI scan. This technique is useful, for example in lumbar spine MRI obtaining images of each intervertebral disc, individually oriented at a different angle, to better recognize herniation or to compare degenerative changes.
This technique is more difficult in the cervical spine MRI region because of the small vertebra and therefore a short distance between the multi angle oblique planes. In case of too short distance or overlapping slices the crosstalk (artifact) destroys the signal with reduced image quality.
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Orientation
 
If available, some graphic aids can be helpful to show image orientations.
1) A graphic icon of the labeled primary axes (A, L, H) with relative lengths given by direction sines and orientation as if viewed from the normal to the image plane can help orient the viewer, both to identify image plane orientation and to indicate possible in plane rotation.
2) Ingraphic prescription of obliques from other images, a sample original image with an overlaid line or set of lines indicating the intersection of the original and oblique image planes can help orient the viewer.
The 3 basic orthogonal slice orientations are:
transversal (T), sagittal (S) and coronal (C).
The basic anatomical directions are:
right(R) to left (L), posterior (P) to anterior (A), and feet (F) to head (H).
A standard display orientation for images in the basic slice orientation is:
1) transverse: A to top of image and L to right,
2) coronal: H to top of image and L to right and
3) sagittal: H to top of image and A to left.
The location in the R/L and P/A directions can be specified relative to the axis of the magnet.
The F/H location can be specified relative to a convenient patient structure.
The orientation of single oblique slices can be specified by rotating a slice in one of the basic orientations toward one of the other two basic orthogonal planes about an axis defined by the intersection of the 2 planes.
Double oblique slices can be specified as the result of tipping a single oblique plane toward the remaining basic orientation plane, about an axis defined by the intersection of the oblique plane and the remaining basic plane. In double oblique angulations, the first rotation is chosen about the vertical image axis and the second about the (new) horizontal axis.
Angles are chosen to have magnitudes less than 90° (for single oblique slices less than 45°); the sign of the angle is taken to be positive when the rotation brings positive axes closer together.
 
Images, Movies, Sliders:
 Brain MRI Sagittal T1 001  Open this link in a new window
    
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 Brain MRI Transversal T2 001  Open this link in a new window
 MRI - Anatomic Imaging of the Ankle 2  Open this link in a new window
    
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Radiology  (8) Open this link in a new windowUltrasound  (6) Open this link in a new window
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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• View the DATABASE results for 'Shoulder MRI' (3).Open this link in a new window


• View the NEWS results for 'Shoulder MRI' (1).Open this link in a new window.
 
Further Reading:
  Basics:
Palpation-directed rotator interval anterior approach technique demonstrates high accuracy
Wednesday, 8 April 2015   by www.healio.com    
MRI of little value in shoulder pain
Tuesday, 29 October 2013   by www.rheumatologyupdate.com.au    
  News & More:
MRI likely useful for detection of full-thickness rotator cuff tears, bicep instability
Tuesday, 2 February 2016   by www.healio.com    
Shoulder pain? Don't rush to get an MRI
Thursday, 10 October 2013   by bangordailynews.com    
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    
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