The magic angle is a precisely defined angle, the value of which is approximately 54.7356°. The magic angle is a root of a second-order Legendre polynomial , P 2 (cos θ ) = 0 , and so any interaction which depends on this second-order Legendre polynomial vanishes at …

The magic angle effect is important in the clinical MR imaging of certain tissues that are highly structured and are oriented obliquely to the main magnetic field (especially tendons, cartilage, and peripheral nerves).

The magic angle artifact is an MRI artifact that occurs due to the phenomenon of nuclear dipole-dipole interactions. It appears as a bright signal on T1-weighted images and can occur in tissues with highly organized collagen fibers, such as tendons, ligaments, and cartilage.

The magic angle is a MRI phenomenon that occurs on sequences with a short TE sequences and it is most pronounced when tendon fibers course at an approximately 55° angle with the main magnetic field vector (Fig. 8).

Aug 13, 2023 · The magic angle is an MRI artifact that occurs in sequences with a short TE (less than 32 ms) - T1 weighted, proton density weighted, and gradient echo sequences.. It is confined to regions of tightly bound collagen at 54.74° from the main magnetic field (B 0), and appears hyperintense, thus potentially being mistaken for tendinopathy.. Normal. In tightly-bound …

TI-weighted (500/25) images obtained byusing a 512x matrix, two acquisitions, and 3-mm section thickness show magic angle effect involving theextensor retinaculum. (a)Apparent discontinuity oftheflexor retinaculum overlies thesecond extensor compartment (solid straight arrows). The retinaculum appears relatively hypointense near theosseous ...

The 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.

Jan 26, 2007 · This review provides a formalism for understanding magic angle effects in clinical studies. It involves consideration of the fiber-to-field angle for linear structures such as tendons, ligaments, and...

the magic angle effect just as a source of artifact in certain tendons and ligaments that happen to be at 55° to B 0 when these structures are imaged in typical sole-noidal magnets. The broader view of the role of magic angle effects includes localized artifacts as first de-scribed, but in a wider range of situations, magic angle

We investigated the hypothesis that signal intensity from peripheral nerves is increased when the nerve’s orientation to the constant magnetic induction field (B0) approaches 55° (the magic angle).