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Il Giornale Italiano di Radiologia Medica 2019 Gennaio-Febbraio;6(1):62-70

DOI: 10.23736/S2283-8376.19.00154-2

Copyright © 2019 EDIZIONI MINERVA MEDICA

language: English, Italian

Cardiac MRI at 3 Tesla vs. 1.5 Tesla: advantages, limitations, artifacts in personal experience

Irene CAMPO , Lorenzo PAGNAN, Francesca SACCONI, Camilla SACHS, Marco SORATO, Maria Assunta COVA

Unit of Diagnostic Interventional Radiology, University Clinic Department of Surgical and Health Medical Sciences, Cattinara Hospital, Azienda Sanitaria Universitaria Integrata di Trieste, University of Trieste, Trieste, Italy


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Even though 3 Tesla imaging of the heart results in a better signal/noise ratio, it appears more burdened by the genesis of different artifacts that can depend by the magnetic field intensity itself, or by environmental factors, medical or not medical devices present in the patient and anatomical peculiarities of the studied region which is subject, in this case, both to continuous extrinsic movements due to respiration and intrinsic movements due to cardiac pulsation. It is therefore of fundamental importance for the radiologist who uses this type of tomographs, to recognize the nature of the main artifacts due to the high field intensity of 3T systems in order to reduce them, optimizing the sequences or exploiting them by tissue characterization. From November 2017 to July 2018, 193 patients underwent 3 Tesla Cardiac MR (CMR). In our experience, the advantages detected in image quality have mainly occurred in the sequences of late enhancement, in those of perfusion and in the sequences for myocardial tagging. The sequence performed in SSFP (balance FFE), on the other hand, showed less contrast between the myocardial signal and the signal of circulating blood because of the higher T1 time. All the sequences employed were degradated the most by artifacts due to the greater inhomogeneity of both B0 and B1.


KEY WORDS: Magnetic resonance imaging - Heart - Artifacts

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