Magnetic Susceptibility Artefact

Tags: Magnetic Susceptibility, Artefact, Susceptibility Gradient

Musculoskeletal MRI 101 (II/II)

Tags: Meniscal tears, FSE, echo train length, ETL, echo spacing, T2 decay, signal jump, image blur, magnetization transfer, k-space, artefact

Musculoskeletal MRI 101 (I/II)

Tags: MSK, musculoskeletal MRI, protocol, magnetization transfer, magnetization transfer suppression, magic angle effect, tissue contrast, pulse sequences

Magic Angle Phenomenon

Illustrations

Tags: Magic angle effect, magic angle phenomenon, tendon, hyaline cartilage, fibrous cartilage, degeneration, tendinitis, partial tear

Sources:

Li and Mirowitz. Manifestation of magic angle phenomenon: comparative study on effects of varying echo time and tendon orientation among various MR sequences. Magnetic resonance imaging (2003) vol. 21 (7) pp. 741-4.

Erickson et al. The "magic angle" effect: background physics and clinical relevance. Radiology (1993) vol. 188 (1) pp. 23-5.

Mengiardi et al. Magic angle effect in MR imaging of ankle tendons: influence of foot positioning on prevalence and site in asymptomatic subjects and cadaveric tendons. Eur Radiol (2006) vol. 16 (10) pp. 2197-2206.

Clinical Applications of In-& Out-of-Phase Imaging

Adrenal MR Imaging

Liver MR Imaging

Spine MR Imaging

Tags: In-phase, out-of-phase, chemical shift of the second kind, adrenal adenoma, microscopic intracellular fat, macroscopic fat, Indian ink artifact, fatty liver infiltration, hemochromatosis, benign fracture, osteoporotic fracture, pathologic fracture, neoplastic fracture, wedging.

Reference:

The American College of Radiology, Resident & fellow Section

Off-Resonance Artefacts

TrueFisp Off-Resonance Banding Artefacts