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Cardiac magnetic resonance imaging: artefacts for clinicians
#MMPMID25339204
van der Graaf AW
; Bhagirath P
; Ghoerbien S
; Götte MJ
Neth Heart J
2014[Dec]; 22
(12
): 542-9
PMID25339204
show ga
In recent years, the clinical importance of cardiac magnetic resonance (CMR)
imaging has increased dramatically. As a consequence, more clinicians need to
become familiar with this imaging modality, including its technical challenges.
MR images are obtained through a physical process of proton excitation and the
reception of resonating signals. Besides these physical principles, the motion of
the heart and diaphragm, together with the presence of fast flowing blood in the
vicinity, pose challenges to the acquisition of high-quality diagnostic images
and are an important cause of image artefacts. Artefacts may render images
non-diagnostic and measurements unreliable, and most artefacts can only be
corrected during the acquisition itself. Hence, timely and accurate recognition
of the type of artefact is crucial. This paper provides a concise description of
the CMR acquisition process and the underlying MR physics for clinical
cardiologists and trainees. Frequently observed CMR artefacts are illustrated and
possible adjustments to minimise or eliminate these artefacts are explained.
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