Components of a magnetic resonance imaging system and their relationship to safety and image quality.
Magnetic resonance imaging (MRI) is a powerful diagnostic tool that can be optimized to display a wide range of clinical conditions. An MRI system consists of four major components: a main magnet formed by superconducting coils, gradient coils, radiofrequency (RF) coils, and computer systems. Each c...
| Publicado en: | Pediatric Radiology Vol. 51; no. 5; pp. 716 - 724 |
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| Autores principales: | , , , , |
| Formato: | review Journal Article |
| Publicado: |
Springer Nature
May2021
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=149884451&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 149884451 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 03010449 O03 jtl: Pediatric Radiology issn: 03010449 maglogo: N pubinfo: dt: May2021 vid: 51 iid: 5 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 149884451 149884451 NLM33871725 149884451 10.1007/s00247-020-04894-9 NLM33871725 149884451 ppf: 716 ppct: 8 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Components of a magnetic resonance imaging system and their relationship to safety and image quality. aug: au: Serai, Suraj D. Ho, Mai-Lan Artunduaga, Maddy Chan, Sherwin S. Chavhan, Govind B. affil: Department of Radiology, Children's Hospital of Philadelphia, 3401 Civic Center Blvd., 19104, Philadelphia, PA, USA sug: subj: Magnetic Resonance Imaging Radio Waves ab: Magnetic resonance imaging (MRI) is a powerful diagnostic tool that can be optimized to display a wide range of clinical conditions. An MRI system consists of four major components: a main magnet formed by superconducting coils, gradient coils, radiofrequency (RF) coils, and computer systems. Each component has safety considerations. Unless carefully controlled, the MRI machine's strong static magnetic field could turn a ferromagnetic object into a harmful projectile or cause vertigo and headache. Switching magnetic fields in the gradients evokes loud noises in the scanner, which can be mitigated by ear protection. Gradients also generate varying magnetic fields that can cause peripheral nerve stimulation and muscle twitching. Magnetic fields produced by RF coils deposit energy in the body and can cause tissue heating (with the potential to cause skin burns). In this review, we provide an overview of the components of a typical clinical MRI scanner and its associated safety issues. We also discuss how the relationship between the scanning parameters can be manipulated to improve image quality while ensuring a safe operational environment for the patients and staff. Understanding the strengths and limitations of these parameters can enable users to choose optimal techniques for image acquisition, apply them in clinical practice, and improve the diagnostic accuracy of an MRI examination. pubtype: Academic Journal doctype: review Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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