Three-dimensional Cardiac MR Imaging: Related Techniques and Clinical Applications

Amano, Yasuo; Yanagisawa, Fumi; Tachi, Masaki; Asai, Kuniya; Suzuki, Yasuyuki; Hashimoto, Hidenobu; Kiyohisa, Ishihara; Kumita, Shin‐ichiro

doi:10.2463/mrms.rev.2016-0116

Cited by 15 publications

(10 citation statements)

References 46 publications

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“…In addition, a balanced turbo field echo sequence offers several advantages, such as a high signal‐to‐noise ratio, high spatial resolution and rapid acquisition time (Amano et al. ; Schieda et al. ).…”

Section: Discussionmentioning

confidence: 99%

Magnetic resonance thoracic ductography assessment of serial changes in the thoracic duct after the intake of a fatty meal

et al. 2017

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The thoracic duct, a terminal lymph vessel, is thought to dilate after the intake of a fatty meal. However, this physiological change has not been well explored in vivo. Therefore, the present study aimed to assess serial changes in the thoracic duct after the intake of a fatty meal using magnetic resonance thoracic ductography (MRTD). Eight healthy volunteers were subjected to one MRTD scan before a fatty meal and eight serial MRTD scans every hour thereafter. The cross‐sectional areas of the thoracic duct were estimated using MRTD measurements of the diameters of the thoracic duct at the upper edge of the aortic arch, the tracheal bifurcation, the mid‐point between the tracheal bifurcation and the left part of the diaphragm and the left part of the diaphragm. The change‐rates in these areas were calculated before and after the fatty meal intake, and the maximal change‐rate and timing of its achievement were determined for each subject. The summed change‐rates in the four portions of the thoracic duct ranged from −40.1 to 81.3%, with maximal change‐rates for each subject ranging from 22.8 to 81.3% (mean, 50.4%). Although individual variations were observed, most subjects (88.9%) exhibited a maximal change‐rate at 4–6 h after meal intake, with subsequent decreases at 7–8 h. In conclusion, MRTD revealed a tendency toward thoracic duct enlargement at 4–6 h after the intake of a fatty meal, followed by contraction.

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Section: Discussionmentioning

confidence: 99%

Magnetic resonance thoracic ductography assessment of serial changes in the thoracic duct after the intake of a fatty meal

et al. 2017

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“…89 Recently, however, the scan time has been reported to become drastically shortened within a few minutes owing to the development of acceleration techniques. 90,91 Second, gadolinium enhancement is preferable in the acquisition of 4D flow MRI to improve both the contrast between the blood and the surrounding tissues, and the SNR linked to the velocity-to-noise ratio. 92 This may hamper the clinical use for patients with renal dysfunction.…”

Section: Drawback Of 4d Flow Mri Acquisitionmentioning

confidence: 99%

Utility of 4D Flow MRI in Thoracic Aortic Diseases: A Literature Review of Clinical Applications and Current Evidence

Takahashi

Sekine

Ando

et al. 2022

MRMS

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Despite the recent technical developments, surgery on the thoracic aorta remains challenging and is associated with significant mortality and morbidity. Decisions about when and if to operate are based on a balance between surgical risk and the hazard of aortic rupture. These decisions are sometimes difficult in elective cases of thoracic aortic diseases, including aneurysms and dissections. Abnormal wall stress derived from flow alterations influences disease progression. Therefore, a better understanding of the complex hemodynamic environment inside the aortic lumen will facilitate patient-specific risk assessments of complications, which enable clinicians to provide timely prophylactic interventions. Time-resolved 3D phase-contrast (4D flow) MRI has many advantages for the in vivo assessment of flow dynamics. Recent developments in 4D flow imaging techniques has led to significant advances in our understanding of physiological flow dynamics in healthy subjects and patients with thoracic aortic diseases. In this clinically focused review of thoracic aortic diseases, we demonstrate the clinical advances acquired with 4D flow MRI from published studies. We provide a systematic overview of key evidences and considerations regarding normal thoracic aortas, thoracic aortic aneurysms, aortic dissections, and thoracic aortas with prosthetic graft replacement.

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“…[100] This effect can be mitigated by evolving techniques such as 3D image acquisition or super-resolution image reconstruction. [101,102]…”

Section: Future Directionsmentioning

confidence: 99%

The Role of Cardiac MRI in the Management of Ventricular Arrhythmias in Ischaemic and Non-ischaemic Dilated Cardiomyopathy

Nelson

Garg

Clayton

et al. 2019

Arrhythm Electrophysiol Rev

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Ventricular tachycardia (VT) and VF account for the majority of sudden cardiac deaths worldwide. Treatments for VT/VF include anti-arrhythmic drugs, ICDs and catheter ablation, but these treatments vary in effectiveness and carry substantial risks and/or expense. Current methods of selecting patients for ICD implantation are imprecise and fail to identify some at-risk patients, while leading to others being overtreated. In this article, the authors discuss the current role and future direction of cardiac MRI (CMRI) in refining diagnosis and personalising ventricular arrhythmia management. The capability of CMRI with gadolinium contrast delayed-enhancement patterns and, more recently, T1 mapping to determine the aetiology of patients presenting with heart failure is well established. Although CMRI imaging in patients with ICDs can be challenging, recent technical developments have started to overcome this. CMRI can contribute to risk stratification, with precise and reproducible assessment of ejection fraction, quantification of scar and ‘border zone’ volumes, and other indices. Detailed tissue characterisation has begun to enable creation of personalised computer models to predict an individual patient’s arrhythmia risk. When patients require VT ablation, a substrate-based approach is frequently employed as haemodynamic instability may limit electrophysiological activation mapping. Beyond accurate localisation of substrate, CMRI could be used to predict the location of re-entrant circuits within the scar to guide ablation.

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Three-dimensional Cardiac MR Imaging: Related Techniques and Clinical Applications

Cited by 15 publications

References 46 publications

Magnetic resonance thoracic ductography assessment of serial changes in the thoracic duct after the intake of a fatty meal

Magnetic resonance thoracic ductography assessment of serial changes in the thoracic duct after the intake of a fatty meal

Utility of 4D Flow MRI in Thoracic Aortic Diseases: A Literature Review of Clinical Applications and Current Evidence

The Role of Cardiac MRI in the Management of Ventricular Arrhythmias in Ischaemic and Non-ischaemic Dilated Cardiomyopathy

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