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Titolo:
Artifacts in musculoskeletal magnetic resonance imaging: identification and correction
Autore:
Peh, WCG; Chan, JHM;
Indirizzi:
Singapore Gen Hosp, Dept Diagnost Radiol, Singapore 169608, Singapore Singapore Gen Hosp Singapore Singapore 169608 ingapore 169608, Singapore Tuen Mun Hosp, Dept Radiol, Hong Kong, Hong Kong, Peoples R China Tuen MunHosp Hong Kong Hong Kong Peoples R China Kong, Peoples R China
Titolo Testata:
SKELETAL RADIOLOGY
fascicolo: 4, volume: 30, anno: 2001,
pagine: 179 - 191
SICI:
0364-2348(200104)30:4<179:AIMMRI>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGIC-ANGLE PHENOMENON; ANTERIOR CERVICAL DISKECTOMY; MR-IMAGES; POTENTIAL PITFALL; SUSCEPTIBILITY ARTIFACTS; TRUNCATION ARTIFACT; SPINAL-CORD; POSTOPERATIVE SPINE; METALLIC ARTIFACTS; HYALINE CARTILAGE;
Keywords:
chemical shift; imaging artifacts; magic angle phenomenon; magnetic resonance (MR) artifacts; MR imaging; musculoskeletal system; susceptibility;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Peh, WCG Singapore Gen Hosp, Dept Diagnost Radiol, Outram Rd, Singapore 169608, Singapore Singapore Gen Hosp Outram Rd Singapore Singapore 169608 ingapore
Citazione:
W.C.G. Peh e J.H.M. Chan, "Artifacts in musculoskeletal magnetic resonance imaging: identification and correction", SKELETAL RA, 30(4), 2001, pp. 179-191

Abstract

A large number of artifacts occur in magnetic resonance (MR) imaging of the musculoskeletal system. These artifacts may potentially affect the quality of MR images, and may also simulate pathologic conditions and produce pitfalls in interpretation. Motion artifacts may be periodic or random. Protocol-error artifacts include saturation, wraparound, radiofrequency (RF) interference, shading, and partial volume averaging artifacts. Truncation artifacts occur when the number of phase-encoding steps of high spatial frequencies is insufficient (or undersampled) for faithful reproduction of the trueanatomic detail of the original image. Chemical shift artifacts are due tothe protons in fat being mismapped relative to water protons. Susceptibility artifacts occur at the interfaces of structures with different magnetic susceptibilities. Artifacts special to the musculoskeletal system include the magic angle phenomenon and spurious signal induced at very short echo times, both of which affect anisotropic structures such as tendon, ligament, and cartilage. Recognition and, if possible, correction of these artifacts are an important aspect of practical musculoskeletal MR imaging.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 14:29:30