Cardiac magnetic resonance techniques: Our experience on wide bore 3 tesla magnetic resonance system

Auti, Onkar B; Bandekar, Kalashree; Kamat, Nikhil; Raj, Vimal

doi:10.4103/ijri.ijri_503_16

Cited by 5 publications

(5 citation statements)

References 50 publications

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“…To explain the discrepancy between the GLS values, several technical points should be considered. The difference in the magnetic field affects the SSFP images, making them more sensitive to susceptibility and banding artefacts [ 44 , 45 ], therefore, impacting the image quality. Likewise, no patient-specific frequency adjustments to mitigate off-resonance effects were performed.…”

Section: Discussionmentioning

confidence: 99%

Left ventricular myocardial deformation assessment in asymptomatic patients with recently diagnosed sarcoidosis of the respiratory tract and/or extrapulmonary sarcoidosis

Panovský

Doubková

Mojica-Pisciotti

et al. 2021

Orphanet J Rare Dis

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Background Sarcoidosis is a systemic granulomatous disease affecting different organs including the heart. Myocardial strain analysis could potentially detect the early stages of cardiac dysfunction in sarcoidosis patients. The present study aims to assess the use of cardiac magnetic resonance (CMR) strain analysis using feature tracking (FT) in the detection of early cardiac involvement in asymptomatic patients with sarcoidosis. Methods One hundred and thirteen CMR studies of patients with sarcoidosis of the respiratory tract and/or extrapulmonary sarcoidosis without pre-existing known cardiovascular disease were included in the study and analysed using FT and compared to 22 age and gender-matched controls. Global longitudinal strain (GLS), global circumferential strain (GCS) and global radial strain (GRS) of the left ventricle (LV) were measured. Results The sarcoidosis patients did not significantly differ from the controls in basic demographic data and had normal global and regional systolic LV function—LV ejection fraction (EF) 66 ± 7% vs 65 ± 5% in the controls (p = NS). No statistically significant differences were found in all strain parameters between patients and controls: GLS (− 13.9 ± 3.1 vs. − 14.2 ± 2.5), GCS (− 23.4 ± 4.0 vs. − 22.2 ± 2.9) and GRS (53.4 ± 13.5 vs. 51.2 ± 13.6%) (p = NS). Conclusion Patients with sarcoidosis of the respiratory tract and/or extrapulmonary sarcoidosis had normal myocardial deformation measured by CMR-FT derived global strain

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Section: Discussionmentioning

confidence: 99%

Left ventricular myocardial deformation assessment in asymptomatic patients with recently diagnosed sarcoidosis of the respiratory tract and/or extrapulmonary sarcoidosis

Panovský

Doubková

Mojica-Pisciotti

et al. 2021

Orphanet J Rare Dis

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“…Use of this scanner could have affected image quality and maybe led to missing data because of artifacts in some scans, we consider it unlikely that this has affected the associations between growth and cardiac measures. 34 We standardised our measures on BSA to account for current body size. However, height and weight were measured 1.1 months before MRI.…”

Section: Discussionmentioning

confidence: 99%

Fetal and infant growth patterns and left and right ventricular measures in childhood assessed by cardiac MRI

Toemen

Gaillard

Roest

et al. 2019

Eur J Prev Cardiolog

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Objectives Early life is critical for cardiac development. We examined the associations of longitudinal fetal and childhood growth patterns with childhood right and left ventricular structures measured by cardiac magnetic resonance imaging. Methods In a population-based prospective cohort study among 2827 children, we measured growth at 20 and 30 weeks of pregnancy, at birth, 0.5, 1, 2, 6 and 10 years. At 10 years, we measured right ventricular end-diastolic volume, left ventricular end-diastolic volume, left ventricular mass and left ventricular mass-to-volume ratio by cardiac magnetic resonance imaging. Results Small size for gestational age at birth was associated with smaller right and left ventricular end-diastolic volume relative to current body surface area, but with larger left ventricular mass-to-volume ratio ( P < 0.05). Children in the upper 25% of right and left ventricular end-diastolic volume and left ventricular mass at age 10 years were larger at birth and became taller and leaner in childhood ( P < 0.05). In contrast, children in the lower 25% of right and left ventricular end-diastolic volume and left ventricular mass were smaller at birth and became shorter and heavier in childhood ( P < 0.05). Both fetal and childhood growth were independently of each other associated with childhood right and left ventricular end-diastolic volume and left ventricular mass. Conclusion Children who are larger at birth and grow taller and leaner in childhood have larger hearts relative to body surface area. Small size at birth children, who grow shorter and heavier in childhood, have relatively smaller hearts with larger left ventricular mass-to-volume ratio. Both fetal and childhood growth are important for the development of cardiac dimensions.

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“…One participant was scanned on a 1.5 T scanner, the same magnet strength that is used in one commercial MRI-Linac system, and the image quality for this participant was comparable to the participants scanned on the 3 T scanner. In some cases, particularly cardiac imaging, lower magnet strengths may be preferable [ 31 , 32 ], however, conclusions cannot be made regarding this from this study due to the very small sample size. The authors feel that the results of this study are broadly applicable to MRIg AF CR, particularly considering imaging capabilities on commercial MRI-Linacs are variable and rapidly developing.…”

Section: Discussionmentioning

confidence: 95%

Atrial fibrillation cardiac radioablation target visibility on magnetic resonance imaging

et al. 2022

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Magnetic resonance imaging (MRI) guided cardiac radioablation (CR) for atrial fibrillation (AF) is a promising treatment concept. However, the visibility of AF CR targets on MRI acquisitions requires further exploration and MRI sequence and parameter optimization has not yet been performed for this application. This pilot study explores the feasibility of MRI-guided tracking of AF CR targets by evaluating AF CR target visualization on human participants using a selection of 3D and 2D MRI sequences.MRI datasets were acquired in healthy and AF participants using a range of MRI sequences and parameters. MRI acquisition categories included 3D free-breathing acquisitions (3Dacq), 2D breath-hold ECG-gated acquisitions (2DECG-gated), stacks of 2D breath-hold ECG-gated acquisitions which were retrospectively interpolated to 3D datasets (3Dinterp), and 2D breath-hold ungated acquisitions (2Dreal-time). The ease of target delineation and the presence of artifacts were qualitatively analyzed. Image quality was quantitatively analyzed using signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and non-uniformity. Confident 3D target delineation was achievable on all 3Dinterp datasets but was not possible on any of the 3Dacq datasets. Fewer artifacts and significantly better SNR, CNR and non-uniformity metrics were observed with 3Dinterp compared to 3Dacq. 2Dreal-time datasets had slightly lower SNR and CNR than 2DECG-gated and 3Dinterp n datasets. AF CR target visualization on MRI was qualitatively and quantitatively evaluated. The study findings indicate that AF CR target visualization is achievable despite the imaging challenges associated with these targets, warranting further investigation into MRI-guided AF CR treatments.

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Cardiac magnetic resonance techniques: Our experience on wide bore 3 tesla magnetic resonance system

Cited by 5 publications

References 50 publications

Left ventricular myocardial deformation assessment in asymptomatic patients with recently diagnosed sarcoidosis of the respiratory tract and/or extrapulmonary sarcoidosis

Left ventricular myocardial deformation assessment in asymptomatic patients with recently diagnosed sarcoidosis of the respiratory tract and/or extrapulmonary sarcoidosis

Fetal and infant growth patterns and left and right ventricular measures in childhood assessed by cardiac MRI

Atrial fibrillation cardiac radioablation target visibility on magnetic resonance imaging

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