Intravoxel Incoherent Motion Analysis of Abdominal Organs

van, Valerie Doan Phi; Becker, Anton S.; Ciritsis, Alexander; Reiner, Caecilia S.; Boss, Andreas

doi:10.1097/rli.0000000000000426

Cited by 20 publications

(7 citation statements)

References 24 publications

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“…Phi Van et al 27 evaluated the accuracy of IVIM analysis of the parenchymal abdominal organs using SMS-DWI and found that the D values increased and f values decreased significantly with higher AFs. In the present study, higher AFs, lower D and D* values in the liver, and lower D* values in the pancreas were observed; however, these values did not follow similar patterns in other organs.…”

Section: Discussionmentioning

confidence: 99%

“…[15][16][17] Several studies have reported that the SMS technique can shorten the DWI scan time in different organs. [18][19][20][21][22][23][24][25][26] However, a limited number of studies 22,27 have focused on IVIM analysis based on SMS-DWI sequences and found a significant scan time reduction. Phi Van et al 27 reported slight systematic deviations in the IVIM parameters with increased AFs.…”

mentioning

confidence: 99%

“…[18][19][20][21][22][23][24][25][26] However, a limited number of studies 22,27 have focused on IVIM analysis based on SMS-DWI sequences and found a significant scan time reduction. Phi Van et al 27 reported slight systematic deviations in the IVIM parameters with increased AFs. No studies have looked at the impact of DKI parameter calculations based on SMS techniques.…”

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confidence: 99%

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Scan Time Reduction in Intravoxel Incoherent Motion Diffusion-Weighted Imaging and Diffusion Kurtosis Imaging of the Abdominal Organs: Using a Simultaneous Multislice Technique With Different Acceleration Factors

Xu¹,

Zhang²,

Ren³

et al. 2021

J Comput Assist Tomogr

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Objective: To investigate the feasibility of quantitative intravoxel incoherent motion (IVIM) and diffusion kurtosis imaging (DKI) analyses in the upper abdominal organs by simultaneous multislice diffusion-weighted imaging (SMS-DWI). Subjects and Methods:In this prospective study, a total of 32 participants underwent conventional DWI (C-DWI) and SMS-DWI sequences with acceleration factors of 2 and 3 (SMS2-DWI and SMS3-DWI, respectively) in the upper abdomen with multiple b-values (0

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Scan Time Reduction in Intravoxel Incoherent Motion Diffusion-Weighted Imaging and Diffusion Kurtosis Imaging of the Abdominal Organs: Using a Simultaneous Multislice Technique With Different Acceleration Factors

Xu¹,

Zhang²,

Ren³

et al. 2021

J Comput Assist Tomogr

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“…43 The multislice signal can be deconvoluted based on coil sensitivity profiles of multichannel array coils, controlled aliasing in parallel imaging results in higher acceleration (CAIPIRINHA), and field of view shifting. 44 Simultaneous multislice acquisition techniques can be applied to various pulse sequences, including 2D diffusion-weighted imaging [45][46][47] and 2D TSE pulse sequences. 48 Modern blipped simultaneous multislice acquisition techniques are nearly signal neutral because of the sole signal-to-noise reduction dependency on g-factor loss.…”

Section: Acceleration Techniquesmentioning

confidence: 99%

The Value of 3 Tesla Field Strength for Musculoskeletal Magnetic Resonance Imaging

Khodarahmi

Fritz

2021

Invest Radiol

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Musculoskeletal magnetic resonance imaging (MRI) is a careful negotiation between spatial, temporal, and contrast resolution, which builds the foundation for diagnostic performance and value. Many aspects of musculoskeletal MRI can improve the image quality and increase the acquisition speed; however, 3.0-T field strength has the highest impact within the current diagnostic range. In addition to the favorable attributes of 3.0-T field strength translating into high temporal, spatial, and contrast resolution, many 3.0-T MRI systems yield additional gains through high-performance gradients systems and radiofrequency pulse transmission technology, advanced multichannel receiver technology, and high-end surface coils. Compared with 1.5 T, 3.0-T MRI systems yield approximately 2-fold higher signal-to-noise ratios, enabling 4 times faster data acquisition or double the matrix size. Clinically, 3.0-T field strength translates into markedly higher scan efficiency, better image quality, more accurate visualization of small anatomic structures and abnormalities, and the ability to offer high-end applications, such as quantitative MRI and magnetic resonance neurography. Challenges of 3.0-T MRI include higher magnetic susceptibility, chemical shift, dielectric effects, and higher radiofrequency energy deposition, which can be managed successfully. The higher total cost of ownership of 3.0-T MRI systems can be offset by shorter musculoskeletal MRI examinations, higher-quality examinations, and utilization of advanced MRI techniques, which then can achieve higher gains and value than lower field systems. We provide a practice-focused review of the value of 3.0-T field strength for musculoskeletal MRI, practical solutions to challenges, and illustrations of a wide spectrum of gainful clinical applications.

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“…16 The occurring SNR decrease (40% for acceleration factor of 2) is balanced by improved surface coil design and SNR at 3 T. For small structures reduced field of view (zoomed), imaging enables an increased resolution while reducing geometric distortions. 27 Simultaneous multislice DWI can be used to reduce scan time at 3 T. 28 For good fat suppression at 3 T, STIR (short TI inversion recovery) is useful, especially in diffusion-weighted whole-body imaging with background body signal suppression (DWIBS). 21,29 STIR provides low sensitivity against magnetic field inhomogeneity by suppressing body parts with short T1 relaxation times (eg, fat, intestine, or areas of gadolinium enhancement).…”

Section: Solutionsmentioning

confidence: 99%

1.5 vs 3 Tesla Magnetic Resonance Imaging

et al. 2021

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Whole-body magnetic resonance imaging (MRI) systems with a field strength of 3 T have been offered by all leading manufacturers for approximately 2 decades and are increasingly used in clinical diagnostics despite higher costs. Technologically, MRI systems operating at 3 T have reached a high standard in recent years, as well as the 1.5-T devices that have been in use for a longer time. For modern MRI systems with 3 T, more complexity is required, especially for the magnet and the radiofrequency (RF) system (with multichannel transmission). Many clinical applications benefit greatly from the higher field strength due to the higher signal yield (eg, imaging of the brain or extremities), but there are also applications where the disadvantages of 3 T might outweigh the advantages (eg, lung imaging or examinations in the presence of implants). This review describes some technical features of modern 1.5-T and 3-T whole-body MRI systems, and reports on the experience of using both types of devices in different clinical settings, with all sections written by specialist radiologists in the respective fields.This first part of the review includes an overview of the general physicotechnical aspects of both field strengths and elaborates the special conditions of diffusion imaging. Many relevant aspects in the application areas of musculoskeletal imaging, abdominal imaging, and prostate diagnostics are discussed.

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Intravoxel Incoherent Motion Analysis of Abdominal Organs

Cited by 20 publications

References 24 publications

Scan Time Reduction in Intravoxel Incoherent Motion Diffusion-Weighted Imaging and Diffusion Kurtosis Imaging of the Abdominal Organs: Using a Simultaneous Multislice Technique With Different Acceleration Factors

Scan Time Reduction in Intravoxel Incoherent Motion Diffusion-Weighted Imaging and Diffusion Kurtosis Imaging of the Abdominal Organs: Using a Simultaneous Multislice Technique With Different Acceleration Factors

The Value of 3 Tesla Field Strength for Musculoskeletal Magnetic Resonance Imaging

1.5 vs 3 Tesla Magnetic Resonance Imaging

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