Magic angle effect mri
WebNov 1, 1991 · To determine whether orientation in the static field may be responsible for the frequent occurrence of increased signal intensity within normal tendons at magnetic resonance (MR) imaging, seven healthy volunteers were imaged by means of a 1.5-T unit and standard clinical pulse sequences. WebDec 23, 2008 · Previously, as we were investigating the magic angle effect in the collateral ligaments of the distal interphalangeal joint with a low-field MR unit, we observed focal signal intensity changes in the deep digital flexor tendon. 1 Thereafter, we hypothesized that the signal observed in the deep digital flexor tendon could be related to the magic …
Magic angle effect mri
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WebApr 2, 2016 · Magic angle effect affecting the patellar tendon. T2*WI (GRE 560/14, flip angle 30°). Superior aspect of the patellar tendon exhibits localized hyperintensity ( arrows ). This phenomenon can be seen when the tendon is oriented at 55° to the main magnetic field (Bo, superior-inferior direction) WebMagic angle phenomenon is a common artifact in musculoskeletal imaging and should be recognized as a normal finding. When monotonous, coherently aligned structures with …
WebThe MRI manifestation of subacute denervation is an area of diffuse, feathery, increased T2 signal intensity throughout the visualized muscle, differentiating it from the abnormal signal intensity predominantly at the myotendinous junction characteristic of … WebThe magic-angle effect may increase the intraligamentous signal, which may be seen on short echo time (TE) MRI sequences when a collagen structure is oriented at 55 grades to the main magnetic ...
WebThe influence of foot positioning on prevalence of the magic angle effect (MAE) in ankle tendons was investigated. In 30 asymptomatic volunteers and five cadaveric feet, MR … http://www.ajnr.org/content/25/3/431
WebHere we investigated the magic angle effect of the Achilles tendons and entheses on a clinical 3-T scanner using clinical sequences as well as an ultrashort TE sequence with a …
WebMar 8, 2024 · Magic angle spinning is a technique in solid-state NMR spectroscopy, which employs this principle to remove or reduce dipolar couplings, thereby increasing spectral resolution . In MRI, the magic angle effect visualizes as bright spots through an increased T2 time on short echo time (TE) images, for e.g. collagen fibers of tendons and ligaments ... megatron powers and abilitiesWebJan 1, 2012 · The magic angle effect is a phenomenon that results in artifactual hyperintensity in structures with ordered collagen, such as tendons and ligaments. This is because when collagen is oriented at 55° to the main magnetic field, dipole-dipole interactions becomes zero, resulting in a prolongation of T2 relaxation time. megatron rad fanfictionWebMar 14, 2024 · However, the magic angle’s high signal intensity diminishes with increasing TE; thus, it is not usually a problem on the fat-suppressed, FSE, T2-weighted MRIs most … nancy netherton 1590WebPurpose: To overcome some limitations of previous proton orientation-dependent transverse relaxation formalisms in the human brain white matter (WM) by a generalized magic angle effect function. Methods: A cylindrical helix model was developed embracing anisotropic rotational and translational diffusion of restricted molecules in WM, with the ... megatron predacons risingWebThe magic angle can be used in certain conditions to visualize tendons and ligaments in positive contrast, allowing classic analysis with T1 and T2-weighting as well as studies of enhancement after the injection of a contrast agent or with magnetization transfer. nancy neri southampton njThe magic angle artifact refers to the increased signal observed when MRI sequences with short echo time (TE) (e.g., T1 or proton density spin-echo sequences) are used to image tissues with well-ordered collagen fibers in one direction (e.g., tendon or articular hyaline cartilage). This artifact occurs when the angle such fibers make with the magnetic field is equal to θm. Example: This artifact comes into play when evaluating the rotator cuff tendons of the shoulder. … nancy nethercuttWebFeb 1, 2007 · The magic angle effect increases the MRI signal of healthy tendon tissue and could be used for more detailed evaluation of tendon structure. Furthermore, it could support the discrimination of ... nancy nestor-baker westerville