Comparison of End-Expiration Versus End-Inspiration Breath-Holds With Respect to Respiratory Motion Artifacts on T1-Weighted Abdominal MRI

Vu, Kim‐Nhien; Haldipur, Anshul; Roh, Albert T.; Lindholm, Peter; Loening, Andreas M.

doi:10.2214/ajr.18.20239

Cited by 16 publications

(14 citation statements)

References 26 publications

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“…A 32-channel body coil with digital interface was used for signal reception. Besides morphological sequences, hepatic T1 mapping before and 10 min after contrast media application was performed in the same slice position in end-expiration 19 . For T1 mapping, a heart rate independent 10-(2)-7-(2)-5-(2)-3-(2) modified Look-Locker inversion recovery (MOLLI) acquisition scheme with internal triggering was applied.…”

Section: Methodsmentioning

confidence: 99%

Assessment of liver cirrhosis severity with extracellular volume fraction MRI

Mesropyan

Kupczyk

Dold

et al. 2022

Sci Rep

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We aimed to investigate the diagnostic utility of MRI extracellular volume fraction (ECV) for the assessment of liver cirrhosis severity as defined by Child–Pugh class. In this retrospective study, 90 patients (68 cirrhotic patients and 22 controls), who underwent multiparametric liver MRI, were identified. Hepatic T1 relaxation times and ECV were assessed. Clinical scores of liver disease severity were calculated. One-way analysis of variance (ANOVA) followed by Tukey’s multiple comparison test, Spearman’s correlation coefficient, and receiver operating characteristic (ROC) analysis were used for statistical analysis. In cirrhotic patients, hepatic native T1 increased depending on Child–Pugh class (620.5 ± 78.9 ms (Child A) vs. 666.6 ± 73.4 ms (Child B) vs. 828.4 ± 91.2 ms (Child C), P < 0.001). ECV was higher in cirrhotic patients compared to the controls (40.1 ± 11.9% vs. 25.9 ± 4.5%, P < 0.001) and increased depending of Child–Pugh class (33.3 ± 6.0% (Child A) vs. 39.6 ± 4.9% (Child B) vs. 52.8 ± 1.2% (Child C), P < 0.001). ECV correlated with Child–Pugh score (r = 0.64, P < 0.001). ECV allowed differentiating between Child–Pugh classes A and B, and B and C with an AUC of 0.785 and 0.944 (P < 0.001, respectively). The diagnostic performance of ECV for differentiating between Child–Pugh classes A and B, and B and C was higher compared to hepatic native T1 (AUC: 0.651 and 0.910) and MELD score (AUC: 0.740 and 0.795) (P < 0.05, respectively). MRI-derived ECV correlated with Child–Pugh score and had a high diagnostic performance for the discrimination of different Child–Pugh classes. ECV might become a valuable non-invasive biomarker for the assessment of liver cirrhosis severity.

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Section: Methodsmentioning

confidence: 99%

Assessment of liver cirrhosis severity with extracellular volume fraction MRI

Mesropyan

Kupczyk

Dold

et al. 2022

Sci Rep

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“…Breath holding can be performed at end-expiration and inspiration with protocols developed according to local expertise. In a study relating to T1 Abdominal/Hepatic MRI, Vu et al demonstrated a significant reduction in motion-related artifacts with end-expiration compared to end-inspiration in contrast-enhanced and unenhanced sequences [ 61 ]. Future studies assessing end-inspiration in MRE to determine its impact on motion artifacts and subsequent CD activity assessment are needed.…”

Section: Motion Artifactmentioning

confidence: 99%

Challenges and Strategies to Optimising the Quality of Small Bowel Magnetic Resonance Imaging in Crohn’s Disease

et al. 2022

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Magnetic resonance enterography (MRE) is one of the most highly utilised tools in the assessment of patients with small bowel Crohn’s disease (CD). As a non-invasive modality, it has both patient and procedure-related advantages over ileocolonoscopy which is the current gold standard for Crohn’s disease activity assessment. MRE relies upon high-quality images to ensure accurate disease activity assessment; however, few studies have explored the impact of image quality on the accuracy of small bowel CD activity assessment. Bowel distension and motion artifacts are two key imaging parameters that impact the quality of images obtained through MRE. Multiple strategies have been employed to both minimise the effects of motion artifacts and improve bowel distension. This review discusses the definitions of bowel distension and motion artifacts within the literature with a particular focus on current strategies to improve bowel distension and limit motion artifacts in MRE.

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“…Cardiac MRI can be performed at either end-expiration or end-inspiration. In both of these respiratory phases susceptibility artifacts can be seen ( Table II ), while their location is shifted towards the apex at the end-inspiration phase [ 16 ]. The end-expiration leads to a significant decrease of respiratory motion artifacts [ 16 ] and is more pronounced due to the higher reproducibility [ 17 ].…”

Section: Development Of Dti Of the Heart In Vivomentioning

confidence: 99%

Diffusion-weighted imaging and diffusion tensor imaging of the heart in vivo: major developments

Mazur¹,

Krzyżak²,

Hennel³

2022

pwki

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Diffusion-weighted magnetic resonance imaging (DWI) is a powerful diagnostic tool. Contrast in DWI images is dictated by the differences in diffusion of water in tissues, which depends on the tissue type, hydration and fluid composition. Therefore DWI can differentiate between hard and soft tissues, as well as visualize their condition, such as edema, necrosis or fibrosis. Diffusion tensor imaging (DTI) is a DWI technique which additionally delivers information about the microstructure. In cardiovascular applications DWI/DTI can non-invasively characterize the acute to chronic phase of the area at risk and microstructural dynamics without the need to use contrast agents. However, cardiac DWI/DTI differs from other applications due to serious anatomic and technologic challenges. Over the years, scientists have stepped up overcoming more and more advanced obstacles associated with complex 3D myocardial motions, breathing, blood flow and perfusion. The aim of this article is to review milestone technologic advances in DWI/ DTI of the heart in vivo. The discussed development begins with the adjustment of the diffusion imaging block to the electrocardiogram-based most quiescent phase, next considers different pulse sequence designs for first-, second-and higher-order motion compensation and SNR improvement, and ends up with prospects for further developments. Reviewed papers show great progress in this research area, but the gap between the scientific development and common clinical practice is tremendous. Cardiac DWI/ DTI has promising clinical relevance and its addition to routine imaging techniques of patients with heart disease may empower clinical diagnosis.Key words: cardiac diffusion-weighted imaging, cardiac diffusion tensor imaging, in vivo diffusion-weighted magnetic resonance imaging (DWI), in vivo diffusion tensor imaging (DTI).

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Comparison of End-Expiration Versus End-Inspiration Breath-Holds With Respect to Respiratory Motion Artifacts on T1-Weighted Abdominal MRI

Cited by 16 publications

References 26 publications

Assessment of liver cirrhosis severity with extracellular volume fraction MRI

Assessment of liver cirrhosis severity with extracellular volume fraction MRI

Challenges and Strategies to Optimising the Quality of Small Bowel Magnetic Resonance Imaging in Crohn’s Disease

Diffusion-weighted imaging and diffusion tensor imaging of the heart in vivo: major developments

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