Publications de Maryna Volodimirivna Waszak

Head motion measurement and correction using FID navigators

Tobias Kober, Maryna Volodimirivna Waszak

Purpose: To develop a novel framework for rapid, intrinsic head motion measurement in MRI using FID navigators (FIDnavs) from a multichannel head coil array. ...

WILEY2019

Prospective head motion correction using FID-guided on-demand image navigators

Reto Meuli, Rolf Gruetter, Bénédicte Marie Maréchal, Guillaume Bonnier, Gunnar Krüger, Tobias Kober, Tom Hilbert, Maryna Volodimirivna Waszak, Pavel Falkovskiy

PURPOSE: We suggest a motion correction concept that employs free-induction-decay (FID) navigator signals to continuously monitor motion and to guide the acquisition of image navigators for prospective motion correction following motion detection. METHODS: ...

Wiley-Blackwell2017

Motion Correction in Magnetic Resonance Imaging Using the Signal of Free-Induction-Decay

Maryna Volodimirivna Waszak

Magnetic resonance imaging (MRI) is highly susceptible to subject's motion and can significantly degrade image quality. In brain MRI exams, involuntary head movements can affect the sampled k-space data. Such unintended alterations may result in visible im ...

EPFL2016

Accuracy and Precision of Head Motion Information in Multi-Channel Free Induction Decay Navigators for Magnetic Resonance Imaging

Gunnar Krüger, Tobias Kober, Maryna Volodimirivna Waszak, Michael Herbst

Free induction decay (FID) navigators were found to qualitatively detect rigid-body head movements, yet it is unknown to what extent they can provide quantitative motion estimates. Here, we acquired FID navigators at different sampling rates and simultaneo ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Prospective motion correction with FID-triggered image navigators

Jean-Philippe Thiran, Reto Meuli, Rolf Gruetter, Guillaume Bonnier, Gunnar Krüger, Tobias Kober, Tom Hilbert, Maryna Volodimirivna Waszak, Pavel Falkovskiy

2015

FID-guided retrospective motion correction based on autofocusing

Rolf Gruetter, Gunnar Krüger, Tobias Kober, Cristina Granziera, Maryna Volodimirivna Waszak

This work investigates the possibility of using FID navigator signals to improve the performance of a recently proposed autofocusing-based retrospective motion correction technique. FID navigators were incorporated into an MP-RAGE sequence and 3 subjects w ...

2014

FID navigator triggered acquisition of imaging navigators for retrospective head motion correction

Reto Meuli, Rolf Gruetter, Gunnar Krüger, Maryna Volodimirivna Waszak, Pavel Falkovskiy

2014