Fredy Visser

Setup-Free Cardiorespiratory Physiology Synchronization for MRgRT with Fiber Bragg Gratings

Tom Bosma, Laurie J.M. de Vries, D.J. Coops, Nádia Mamede José et autres

nl, es (code pays fourni par la source)

Interleaved Whole Brain 23Na‐MRI and 31P‐MRSI Acquisitions at 7 Tesla

Zahra Shams, Jiying Dai, Mark Gosselink, Hans J. M. Hoogduin et autres

ABSTRACT Non‐1H nuclei magnetic resonance spectroscopy (MRS) offers insights into metabolism, which may aid for example early stages of disease diagnosis, tissue characterization or therapy response evaluation. Sodium MRI can provide valuable information about tissue health and cellular function. When combined with …

nl (code pays fourni par la source)

Detection of vital signs with Fiber Bragg Grating (FBG) sensors ‘integrated’ in the MR-scanner

Hans Hoogduin, Jason van Schoor, Fredy Visser, P.F.H.M. van der Meulen et autres

Motivation: Detection of vital signs in MRI is hampered by the harsh environment of the MR-scanner and requires setup time. Goal(s): Use integrated (i.e. no setup time) sensors that are fully MR-compatible and provide reliable cardiac and respiratory signals. Approach: Fiber Bragg …

Inhomogeneous Magnetization Transfer Imaging in Extremely Preterm Neonates at 7T.

Inge van Ooijen, Lieke van den Wildenberg, Alex A. Bhogal, Ece Ercan et autres

Motivation: Extremely preterm neonates often show myelination delay in the brain, which is associated with long-term neurodevelopmental outcome impairments. Traditional imaging lacks myelin specificity, therefore, we implemented inhomogeneous magnetization transfer (ihMT). Goal(s): This study explores the use of ihMT at 7 Tesla …

Advanced intraoperative image quality using multiple surface coils.

Pien E. J. Jellema, Fredy Visser, Niels Blanken, Alberto De Luca et autres

Advanced intraoperative MRI (io-MRI) could provide additional guidance during pediatric neurosurgery. Currently, io-MRI sequences are acquired with two surface coils when using the DORO head-frame. We investigated if the addition of two surface coils and higher SENSE-factors would increase signal- and contrast-to-noise …

Interleaved Whole Brain 23Na MRI and 31P MRSI Acquisitions at 7T

Zahra Shams, Jiying Dai, Mark Gosselink, Wybe J. M. van der Kemp et autres

The purpose of this study is to assess the feasibility of an interleaved acquisition of 31P MRSI and 23Na MRI. Triple-nuclei [metabolic] imaging of the brain was performed in one scan session with an interleaved acquisition of 3D 31P MRSI and 3D …

Improving advanced intraoperative MRI methods during pediatric neurosurgery

Pien E. J. Jellema, Lilli M. Mannsdörfer, Fredy Visser, Alberto De Luca et autres

Advanced intraoperative MR images (ioMRI) acquired during the resection of pediatric brain tumors could offer additional physiological information to preserve healthy tissue. With this work, we aimed to develop a protocol for ioMRI with increased sensitivity for arterial spin labeling (ASL) and …

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Introduction of ultra-high-field MR brain imaging in infants: vital parameters, temperature and comfort

Inge M van Ooijen, Kim V. Annink, Manon J.N.L. Benders, Jeroen Dudink et autres

Background: Brain MRI in infants at ultra-high-field scanners might improve diagnostic quality, but safety should be evaluated first. In our previous study, we reported simulated specific absorption rates and acoustic noise data at 7 Tesla. Methods: In this study, we included twenty …

nl (code pays fourni par la source)

Introduction of Ultra-High-Field MR Imaging in Infants: Preparations and Feasibility

Kim V. Annink, Niek E. van der Aa, Jeroen Dudink, Thomas Alderliesten et autres

BACKGROUND AND PURPOSE: Cerebral MR imaging in infants is usually performed with a field strength of up to 3T. In adults, a growing number of studies have shown added diagnostic value of 7T MR imaging. 7T MR imaging might be of additional …

nl, us (code pays fourni par la source)

The YOUth cohort study: MRI protocol and test-retest reliability in adults

Elizabeth E.L. Buimer, Pascal Pas, Rachel M. Brouwer, Martijn Froeling et autres

The YOUth cohort study is a unique longitudinal study on brain development in the general population. As part of the YOUth study, 2000 children will be included at 8, 9 or 10 years of age and planned to return every three years …

nl (code pays fourni par la source)

Implications of Extracranial Distortion in Ultra-High-Field Magnetic Resonance Imaging for Image-Guided Cranial Neurosurgery

Eduard Voormolen, Sander Diederen, Peter A. Woerdeman, Jan Willem Berkelbach van der Sprenkel et autres

nl, fi (code pays fourni par la source)

Quantification of Intracranial Aneurysm Volume Pulsation with 7T MRI

Rachel Kleinloog, Jaco J.M. Zwanenburg, B. Schermers, E. Krikken et autres

BACKGROUND AND PURPOSE: Aneurysm volume pulsation is a potential predictor of intracranial aneurysm rupture. We evaluated whether 7T MR imaging can quantify aneurysm volume pulsation. MATERIALS AND METHODS: In Stage I of the study, 10 unruptured aneurysms in 9 patients were studied …

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