Comparison between two types of improved motion‐sensitized driven‐equilibrium (iMSDE) for intracranial black‐blood imaging at 3.0 tesla

Obara, Makoto; Kuroda, Kagayaki; Wang, Jinnan; Honda, Masahiko; Yoneyama, Masami; Imai, Yutaka; Cauteren, Marc Van

doi:10.1002/jmri.24430

Cited by 33 publications

(31 citation statements)

References 16 publications

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“…Nagao et al [13] used a 3D TSE sequence implemented with a blackblood technique called motion-sensitized driven equilibrium (MSDE) preparation (TSE-MSDE). With MSDE preparation, signals from flowing blood are selectively suppressed through phase-dispersion induced by flow-sensitizing gradients [16][17][18][19][20]. Nagao et al [13] reported that TSE-MSDE could increase the sensitivity in detecting metastases and shorten the reading time compared to a conventional 3D GRE sequence.…”

Section: Introductionmentioning

confidence: 97%

3D MR Sequence Capable of Simultaneous Image Acquisitions with and without Blood Vessel Suppression: Utility in Diagnosing Brain Metastases

et al. 2014

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Section: Introductionmentioning

confidence: 97%

3D MR Sequence Capable of Simultaneous Image Acquisitions with and without Blood Vessel Suppression: Utility in Diagnosing Brain Metastases

et al. 2014

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“…Next, we will discuss the imaging principles of Dynamic iMSDE SSFP. The iMSDE 4,5) is a technique that induces spin dephasing using a magnetic field gradient that is sensitive to motion called the motion-sensitized gradient (MSG). The feature of this technology is that there are no limitations in imaging sections or range, and it can be combined with various other imaging methods.…”

Section: Discussionmentioning

confidence: 99%

Simple Identification of Cerebrospinal Fluid Turbulent Motion Using a Dynamic Improved Motion-sensitized Driven-equilibrium Steady-state Free Precession Method Applied to Various Types of Cerebrospinal Fluid Motion Disturbance

Aoki

Horie

Kajihara

et al. 2020

Neurol. Med. Chir.(Tokyo)

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The motion of cerebrospinal fluid (CSF) within the subarachnoid space and ventricles is greatly modulated when propagating synchronously with the cardiac pulse and respiratory cycle and path through the nerves, blood vessels, and arachnoid trabeculae. Water molecule movement that propagates between two spaces via a stoma, foramen, or duct presents increased acceleration when passing through a narrow area and can exhibit "turbulence." Recently, neurosurgeons have started to perform fenestration procedures using neuroendoscopy to treat hydrocephalus and cystic lesions. As part of the postoperative evaluation, a noninvasive diagnostic technique to visualize the water molecules at the fenestrated site is necessary. Because turbulence is observed at this fenestrated site, an imaging technique appropriate for observing this turbulence is essential. We therefore investigated the usefulness of a dynamic improved motion-sensitized driven-equilibrium steady-state free precession (Dynamic iMSDE SSFP) sequence of magnetic resonance imaging that is superior for ascertaining turbulent motions in healthy volunteers and patients. Images of Dynamic iMSDE SSFP from volunteers revealed that CSF motion at the ventral surface of the brainstem and the third ventricle is augmented and turbulent. Moreover, our findings confirmed that this technique is useful for evaluating treatments that utilize neuroendoscopy. As a result, Dynamic iMSDE SSFP, a simple sequence for visualizing CSF motion, entails a short imaging time, can extensively visualize CSF motion, does not require additional processes such as labeling or trigger setting, and is anticipated to have wide-ranging clinical applications in the future.

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“…The number of 180° refocusing pulses in the control module is two for AccASL, and four for eAccASL (Figure B,C). An additional block of unipolar gradients similar to the ones used in the labeling scheme was inserted before the first 90° excitation pulse to optimize eddy current cancelation . Duration of T2‐preparation for both AccASL and eAccASL was 20 ms.…”

Section: Methodsmentioning

confidence: 99%

“…An additional block of unipolar gradients similar to the ones used in the labeling scheme was inserted before the first 90° excitation pulse to optimize eddy current cancelation. 9 Duration of T2-preparation for both AccASL and eAccASL was 20 ms. The MSG strength is defined by the acceleration causing a phase change of π (AENC: acceleration-encoding).…”

Section: Eaccasl Schemementioning

confidence: 99%

Robust visualization of middle cerebral artery main trunk by enhanced acceleration‐selective arterial spin labeling (eAccASL) for intracranial MRA

Akamine¹,

Obara²,

Togao

et al. 2018

Magnetic Resonance in Med

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Purpose A new sequence for intracranial MRA is developed, named enhanced acceleration‐selective arterial spin labeling (eAccASL), to improve main artery visualization at middle cerebral artery (MCA). The aim of this study is to assess the visualization improvement using eAccASL, compared with the previously developed AccASL. Methods eAccASL and AccASL were performed in 8 healthy volunteers and images were compared between the 2 sequences. One patient with Moyamoya disease was evaluated by eAccASL and time of flight. For the volunteer images, vessel visualization was assessed by measuring the contrast‐to‐noise ratio between MCA M1 to M4 and white matter and by counting the peripheral arteries. Venous artifact level was assessed by measuring the contrast‐to‐noise ratio between the confluence of the sinuses and white matter and by evaluating cortical vein visualization. For the patient images, qualitative assessment of peripheral and collateral vessel visualization was conducted. Results In the MCA main trunk, higher arterial signal intensity, with reduced flow void, was observed in eAccASL compared with AccASL. Contrast‐to‐noise ratios of M1 to M3 for eAccASL were significantly higher than those of AccASL. There was no significant difference between AccASL and eAccASL for venous artifact. Conclusion eAccASL could produce better MCA main trunk visualization compared with AccASL, while maintaining good venous signal suppression.

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Comparison between two types of improved motion‐sensitized driven‐equilibrium (iMSDE) for intracranial black‐blood imaging at 3.0 tesla

Abstract: Our results show that iMSDE-2 demonstrated smaller loss in signal and less spatial variation compared with iMSDE-1, we conjecture due to the improved eddy current compensation.

Cited by 33 publications

References 16 publications

3D MR Sequence Capable of Simultaneous Image Acquisitions with and without Blood Vessel Suppression: Utility in Diagnosing Brain Metastases

3D MR Sequence Capable of Simultaneous Image Acquisitions with and without Blood Vessel Suppression: Utility in Diagnosing Brain Metastases

Simple Identification of Cerebrospinal Fluid Turbulent Motion Using a Dynamic Improved Motion-sensitized Driven-equilibrium Steady-state Free Precession Method Applied to Various Types of Cerebrospinal Fluid Motion Disturbance

Robust visualization of middle cerebral artery main trunk by enhanced acceleration‐selective arterial spin labeling (eAccASL) for intracranial MRA

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