Feasibility and evaluation of dual-source transmit 3D imaging of the orbits: Comparison to high-resolution conventional MRI at 3T

Seeger, Achim; Schulze, Maximilian; Schuettauf, Frank; Klose, Uwe; Ernemann, Ulrike; Hauser, Till‐Karsten

doi:10.1016/j.ejrad.2015.03.008

Cited by 11 publications

(10 citation statements)

References 27 publications

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“…The diagnosis-related parameters were measured in a single intracranial artery steno-occlusion with measureable wall NEURORADIOLOGY: Intracranial Artery Steno-Occlusion Chung et al ratio (25). However, importantly, the diagnosis of intracranial artery stenoocclusion was not significantly affected by the decreased image quality of zoomed MR imaging in our study.…”

Section: Comparison Of Diagnosis-related Parameters Between Full-fov mentioning

confidence: 51%

Intracranial Artery Steno-Occlusion: Diagnosis by Using Two-dimensional Spatially Selective Radiofrequency Excitation Pulse MR Imaging

et al. 2017

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Purpose To determine whether magnetic resonance (MR) imaging by using two-dimensional spatially selective radiofrequency (RF) excitation pulses (zoomed MR imaging) is a reliable method for the diagnosis of intracranial artery steno-occlusion compared with full-field-of-view (FOV) MR imaging. Materials and Methods The institutional review board approved this retrospective study and informed consent was waived. From December 2014 to August 2015, 88 patients who underwent both full-FOV MR imaging and zoomed MR imaging for further evaluation of intracranial artery steno-occlusion at prior luminal evaluation were included. Two neuroradiologists independently diagnosed the diseases (atherosclerosis, dissection, moyamoya disease, vasculitis, undetermined diagnosis, and no vascular pathologic condition) based on both clinical information and MR imaging features and assessed diagnosis-related parameters (diameter, length, eccentricity index, eccentricity, signal intensity ratio, vessel wall hemorrhage, and the total number of lesions), as well as image quality parameters (signal-to-noise ratio and image quality scale) with full-FOV MR imaging and zoomed MR imaging. Parametric measurements were compared between full-FOV MR imaging and zoomed MR imaging by using paired t test and McNemar test. The criterion for intermethod reliability was that the upper limit of the 95% confidence interval (CI) in the difference of agreement was less than 10% based on a noninferiority test. Results The pooled agreement for diagnosing the disease between full-FOV MR imaging and zoomed MR imaging was 93% (164 of 176 lesions). The difference of agreement was 2.84% (one-sided 95% CI: -0.49%, 6.17%). The diagnosis-related parameters were not significantly different between both methods (all P > .05), with good to excellent agreement (both intraclass correlation coefficient and κ value ≥0.61). However, full-FOV MR imaging had better image quality parameters than zoomed MR imaging, including precontrast signal-to-noise ratio and image quality scale (both P < .05). Conclusion Zoomed MR imaging is a reliable method for the diagnosis of intracranial artery steno-occlusion compared with full-FOV MR imaging. RSNA, 2017 Online supplemental material is available for this article. An earlier incorrect version of this article appeared online. This article was corrected on May 2, 2017.

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Section: Comparison Of Diagnosis-related Parameters Between Full-fov mentioning

confidence: 51%

Intracranial Artery Steno-Occlusion: Diagnosis by Using Two-dimensional Spatially Selective Radiofrequency Excitation Pulse MR Imaging

et al. 2017

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“…Although DTI plays a key role in studying the integrity of microstructure and macrostructure of white matter tracts, existing distortion increased the challenge in its application in spinal cords. Current data acquisition methods mainly include parallel imaging and local enhancement shimming to reduce tissue‐induced susceptibility inhomogeneity distortion . However, these methods cannot thoroughly remove artifacts, and distortion still exists in spinal cord data, which may lead to false conclusions in potential SCI research.…”

Section: Discussionmentioning

confidence: 99%

“…It enables local B1-shimming so that the excitation of interested volume exhibits improved homogeneity to enhance spatial resolution, and significantly shortens the length of the echo train of echo-planar imaging sequence to reduce scanning time without causing additional fold-over artifact. 18,19 Riffel et al 19 used the inner-volume imaging technique to obtain diffusion-weighted images (DWI) of the heads and necks of healthy volunteers, gained a better image quality of zoomed DWI compared with traditional DWI. Seeger et al 20 conducted zoomed DWI scanning for patients with acute spinal cord ischemia injury and acquired a more detailed injury status than traditional DWI.…”

Section: Introductionmentioning

confidence: 99%

“…Theoretically, this approach can be used to provide spatially tailored RF pulses and leads to a decreased number of k‐space acquisition lines with a reduced field of view (FOV) in the phase‐encoding direction. It enables local B1‐shimming so that the excitation of interested volume exhibits improved homogeneity to enhance spatial resolution, and significantly shortens the length of the echo train of echo‐planar imaging sequence to reduce scanning time without causing additional fold‐over artifact . Riffel et al used the inner‐volume imaging technique to obtain diffusion‐weighted images (DWI) of the heads and necks of healthy volunteers, gained a better image quality of zoomed DWI compared with traditional DWI.…”

Section: Introductionmentioning

confidence: 99%

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Image correction for diffusion tensor imaging of Rhesus monkey thoracic spinal cord

Rao

Liu

Zhao

et al. 2019

J of Medical Primatology

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Background: The relatively tiny spinal cord of non-human primate (NHP) causes increased challenge in diffusion tensor imaging (DTI) post-processing. This study aimed to establish a reliable correction strategy applied to clinical DTI images of NHP. Methods: Six normal and partial spinal cord injury (SCI) rhesus monkeys underwent 3T MR scanning. A correction strategy combining multiple iterations and non-rigid deformation was used for DTI image post-processing. Quantitative evaluations were then conducted to investigate effects of distortion correction.Results: After correction, longitudinal geometric distortion, global distortion, and residual distance errors were all significantly decreased (P < 0.05). Fractional anisotropy at the injured site was remarkably lower than that at the contralateral site (P = 0.0488) and was substantially lower than those at the adjacent superior (P = 0.0157) and inferior (P = 0.0128) areas at the same side. Conclusions:Our image correction strategy can improve the quality of the DTI images of NHP thoracic cords, contributing to the development of SCI preclinical research. K E Y W O R D S image correction strategy, non-human primates, preclinical research, spinal cord injury | 321 RAO et Al.

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“…However, even with the combination of T1 3D subtraction technique, the presence of contrast enhancement still resulted in misclassification in some cases. These errors may be further improved by the application of more advanced imaging techniques such as 3D CAIPIRINHA (controlled aliasing in parallel imaging results in higher acceleration) (38), compressed sensing (39), or reduced field-of-view imaging (40,41), which can provide higher spatial resolution without increasing scan time.…”

Section: Discussionmentioning

confidence: 99%

Comparison of 3D Volumetric Subtraction Technique and 2D Dynamic Contrast Enhancement Technique in the Evaluation of Contrast Enhancement for Diagnosing Cushing's Disease

Park

Kim

Lee

et al. 2018

Investig Magn Reson Imaging

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Feasibility and evaluation of dual-source transmit 3D imaging of the orbits: Comparison to high-resolution conventional MRI at 3T

Cited by 11 publications

References 27 publications

Intracranial Artery Steno-Occlusion: Diagnosis by Using Two-dimensional Spatially Selective Radiofrequency Excitation Pulse MR Imaging

Intracranial Artery Steno-Occlusion: Diagnosis by Using Two-dimensional Spatially Selective Radiofrequency Excitation Pulse MR Imaging

Image correction for diffusion tensor imaging of Rhesus monkey thoracic spinal cord

Comparison of 3D Volumetric Subtraction Technique and 2D Dynamic Contrast Enhancement Technique in the Evaluation of Contrast Enhancement for Diagnosing Cushing's Disease

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