<scp>Three‐dimensional</scp> multicontrast blood imaging with a single acquisition: Simultaneous non‐contrast‐enhanced <scp>MRA</scp> and vessel wall imaging in the thoracic aorta

Tachikawa, Yoshihiko; Hamano, Hiroshi; Yoshikai, Hikaru; Ikeda, Kazuyo; Maki, Y.; Hirata, Kazuhide; Takahashi, Yoshihiro; Matake, Kunishige

doi:10.1002/mrm.29217

Cited by 5 publications

(7 citation statements)

References 37 publications

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“…While these methods enable the assessment of the lumen of the vessel, they do not provide means for assessing the vessel wall. More recently, multicontrast approaches that enable simultaneous bright‐ and black‐blood imaging of the aorta have been introduced in the literature 36,37 . Hu et al introduced MT‐MACS, a multitasking‐based approach for multidimensional assessment of the cardiovascular system, which enables bright‐, black‐, and gray‐blood imaging with 1.38 mm 3 isotropic resolution from a single scan with 6 minutes, albeit requiring a long reconstruction time of 110 minutes 36 .…”

Section: Discussionmentioning

confidence: 99%

“…Hu et al introduced MT‐MACS, a multitasking‐based approach for multidimensional assessment of the cardiovascular system, which enables bright‐, black‐, and gray‐blood imaging with 1.38 mm 3 isotropic resolution from a single scan with 6 minutes, albeit requiring a long reconstruction time of 110 minutes 36 . Tachikawa et al proposed bright and dark blood images with multishot gradient‐echo EPI (BRIDGE), achieving good quality black‐ and bright‐blood images with a nonisotropic resolution of 1.6 × 1.6 × 3 mm from a scan with ~3.5 minutes 37 . While promising, these approaches have mainly been demonstrated in healthy subjects or small cohorts of patients (≤10) 36,37 .…”

Section: Discussionmentioning

confidence: 99%

“…37 While promising, these approaches have mainly been demonstrated in healthy subjects or small cohorts of patients (≤10). 36,37 On the other hand, in this study, iT2Prep-BOOST has been applied to a cohort of 30 patients with aortopathy, obtaining high-resolution isotropic images (1.3 mm 3 ) from a scan with $8 minutes that requires $3 minutes in-line image reconstruction time and 3-5 minutes offline denoising, thus potentially encouraging a more straightforward adoption in the clinical routine. The iT2Prep-BOOST sequence presented in this article uses a bSSFP readout, which might be susceptible to artifacts induced by field inhomogeneities at higher magnetic fields.…”

Section: Discussionmentioning

confidence: 99%

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Simultaneous Highly Efficient Contrast‐Free Lumen and Vessel Wall MR Imaging for Anatomical Assessment of Aortic Disease

Muñoz

Fotaki

Hua

et al. 2023

Magnetic Resonance Imaging

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BackgroundBright‐blood lumen and black‐blood vessel wall imaging are required for the comprehensive assessment of aortic disease. These images are usually acquired separately, resulting in long examinations and potential misregistration between images.PurposeTo characterize the performance of an accelerated and respiratory motion‐compensated three‐dimensional (3D) cardiac MRI technique for simultaneous contrast‐free aortic lumen and vessel wall imaging with an interleaved T2 and inversion recovery prepared sequence (iT2Prep‐BOOST).Study TypeProspective.PopulationA total of 30 consecutive patients with aortopathy referred for a clinically indicated cardiac MRI examination (9 females, mean age ± standard deviation: 32 ± 12 years).Field Strength/Sequence1.5‐T; bright‐blood MR angiography (diaphragmatic navigator‐gated T2‐prepared 3D balanced steady‐state free precession [bSSFP], T2Prep‐bSSFP), breath‐held black‐blood two‐dimensional (2D) half acquisition single‐shot turbo spin echo (HASTE), and 3D bSSFP iT2Prep‐BOOST.AssessmentiT2Prep‐BOOST bright‐blood images were compared to T2prep‐bSSFP images in terms of aortic vessel dimensions, lumen‐to‐myocardium contrast ratio (CR), and image quality (diagnostic confidence, vessel sharpness and presence of artifacts, assessed by three cardiologists on a 4‐point scale, 1: nondiagnostic to 4: excellent). The iT2Prep‐BOOST black‐blood images were compared to 2D HASTE images for quantification of wall thickness. A visual comparison between computed tomography (CT) and iT2Prep‐BOOST was performed in a patient with chronic aortic dissection.Statistical TestsPaired t‐tests, Wilcoxon signed‐rank tests, intraclass correlation coefficient (ICC), Bland–Altman analysis. A P value < 0.05 was considered statistically significant.ResultsBright‐blood iT2Prep‐BOOST resulted in significantly improved image quality (mean ± standard deviation 3.8 ± 0.5 vs. 3.3 ± 0.8) and CR (2.9 ± 0.8 vs. 1.8 ± 0.5) compared with T2Prep‐bSSFP, with a shorter scan time (7.8 ± 1.7 minutes vs. 12.9 ± 3.4 minutes) while providing a complementary 3D black‐blood image. Aortic lumen diameter and vessel wall thickness measurements in bright‐blood and black‐blood images were in good agreement with T2Prep‐bSSFP and HASTE images (<0.02 cm and <0.005 cm bias, respectively) and good intrareader (ICC > 0.96) and interreader (ICC > 0.94) agreement was observed for all measurements.Data ConclusioniT2Prep‐BOOST might enable time‐efficient simultaneous bright‐ and black‐blood aortic imaging, with improved image quality compared to T2Prep‐bSSFP and HASTE imaging, and comparable measurements for aortic wall and lumen dimensions.Evidence Level2.Technical EfficacyStage 2.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Simultaneous Highly Efficient Contrast‐Free Lumen and Vessel Wall MR Imaging for Anatomical Assessment of Aortic Disease

Muñoz

Fotaki

Hua

et al. 2023

Magnetic Resonance Imaging

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“…Sharpness quantification was adopted from previous publications (16)(17)(18). For each image of all MRCP sequences, using MATLAB software, an intensity profile was measured across the common bile duct.…”

Section: Clinical Studymentioning

confidence: 99%

Magnetic resonance cholangiopancreatography using T2 preparation pulse: quantitative and qualitative analyses

Ihara,

Oura,

Ichimura

et al. 2023

Acta Radiol

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Background Magnetic resonance cholangiopancreatography (MRCP) may exhibit ghosting and blurring artifacts due to irregular breathing cycles, which can be overcome by shortening the shot duration. T2 preparation pulse enables heavy T2 contrast even with a shorter TE by use of the shortened shot duration; therefore, a technique using T2 preparation pulse combined with 3D turbo spin-echo MRCP (TPT-MRCP) was constructed. Purpose To evaluate the clinical usefulness of TPT-MRCP in both navigation and breath-hold sequences compared to the conventional method. Material and Methods We obtained navigation MRCP, which were TPT and conventional 3D turbo spin-echo in 37 patients, and breath-hold MRCP in 31 patients, which were TPT and gradient and spin echo. The quantitative evaluation included signal-to-noise ratio, contrast ratio, contrast-to-noise ratio and sharpness of the common bile duct in all sequences. Two radiologists visually evaluated image quality using a five-point grading method, assessing overall image quality and each of the six areas: common bile duct, right hepatic duct, left hepatic duct, main pancreatic duct, cystic duct and motion artifact. Results TPT-MRCP was significantly superior to conventional MRCP in all quantitative evaluations, except for signal-to-noise ratio in the navigation sequence. In the visual evaluation, TPT-MRCP provided higher image quality than the conventional technique in nearly all areas. The kappa (k) coefficient of the overall image quality was good for all sequences (κ = 0.61–0.8). Conclusion TPT-MRCP provides higher image quality than conventional techniques in both navigation and breath-hold sequences. The present study demonstrates the greater clinical usefulness of TPT-MRCP.

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“…Black-blood (BB) vessel wall magnetic resonance imaging (MRI) has been demonstrated to be a promising technique for the assessment of thoracic aortic diseases (10,11). Through blood signal suppression, it can increase the contrast between the blood and vessel wall (12).…”

Section: Introductionmentioning

confidence: 99%

High-efficiency 3D black-blood thoracic aorta imaging with patch-based low-rank tensor reconstruction

Shi¹,

Liu²,

Cheng³

et al. 2023

Quant Imaging Med Surg

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Background: Three-dimensional (3D) black-blood (BB) vessel wall imaging is a promising noninvasive imaging technique for assessing thoracic aortic diseases. We aimed to develop and evaluate a fast thoracic aorta vessel wall imaging method with patch-based low-rank tensor (Pt-LRT) reconstruction using the 3D-modulated variable flip angle fast-spin echo (vFA-FSE) sequence. Methods:The Pt-LRT technique adopts a low-rank tensor image model with regularization to explore the local low-rankness and nonlocal redundancies of the images to assess the thoracic aorta vessel wall. It uses high-order tensors to capture correlations between data in multiple dimensions and reconstructs images from highly undersampled data. For this study, 12 healthy participants and 2 patients with thoracic aortic diseases were evaluated at 3T magnetic resonance (MR). The reconstruction results were compared to the traditional generalized autocalibrating partially parallel acquisitions (GRAPPA) and ℓ 1 -SPIRiT reconstruction to assess the feasibility of the proposed framework. Quantitative analyses of the vessel wall thickness (VWT), internal diameter (ID), lumen area (LA), and contrast-to-noise ratio (CNR) between the lumen and vessel wall were performed on all healthy participants.Results: Results demonstrated no significant differences between the GRAPPA and the proposed Pt-LRT in VWT, ID, or LA of the aorta (P<0.05). A higher mean CNR was attained with 3D patch-based low-rank tensor reconstruction than with ℓ 1 -SPIRiT reconstruction (49.4±10.8 vs. 38.9±8.2). Conclusions:The proposed 3D BB thoracic aorta vessel wall imaging method can reduce the scan time and produce an image quality that is in good agreement with the conventional GRAPPA acquisition, which takes approximately more than 8 min. This study also shows that the proposed Pt-LRT method substantially improves the visualization and sharpness of the vessel wall and the definition of the tissue boundary compared to the imaging obtained with ℓ 1 -SPIRiT.

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Three‐dimensional multicontrast blood imaging with a single acquisition: Simultaneous non‐contrast‐enhanced MRA and vessel wall imaging in the thoracic aorta

Cited by 5 publications

References 37 publications

Simultaneous Highly Efficient Contrast‐Free Lumen and Vessel Wall MR Imaging for Anatomical Assessment of Aortic Disease

Simultaneous Highly Efficient Contrast‐Free Lumen and Vessel Wall MR Imaging for Anatomical Assessment of Aortic Disease

Magnetic resonance cholangiopancreatography using T2 preparation pulse: quantitative and qualitative analyses

High-efficiency 3D black-blood thoracic aorta imaging with patch-based low-rank tensor reconstruction

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