Velocity Variability in MRI Phase-Contrast

Simple item page
dc.contributor.authorFiroozabadi, A. D.
dc.contributor.authorIrarrázaval Mena, Pablo
dc.contributor.authorUribe Arancibia, Sergio A.
dc.contributor.authorTejos Núñez, Cristián Andrés
dc.contributor.authorSing-Long C., Carlos A.
dc.date.accessioned2022-05-11T20:05:46Z
dc.date.available2022-05-11T20:05:46Z
dc.date.issued2018
dc.description.abstractMRI phase contrast is a well known technique for computing the average velocity associated to each pixel. In this work, we calculate the exact probability distribution function for the velocity given the noise in the signal. This pdf is not necessarily Gaussian, particularly for low Signal-to-Noise ratio. We first find the pdf of the signals phase, assuming Gaussian noise in the real and imaginary channels of the signal. The pdf of the velocity is then the convolution of the phases pdfs. To confirm this, we measure several times the velocity in a flow phantom and compare the empirical histogram with the theoretical pdf. We also acquire the velocity from a volunteers aorta using a standard protocol for 4D Flow and multiple coils. Based on this noise characterization, we also propose an optimal weighing for combining multiple coils which is not based only on the coil sensitivities.
dc.fuente.origenIEEE
dc.identifier.doi10.23919/EUSIPCO.2018.8553535
dc.identifier.isbn978-9082797015
dc.identifier.issn2076-1465
dc.identifier.urihttps://doi.org/10.23919/EUSIPCO.2018.8553535
dc.identifier.urihttps://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=8553535
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/63774
dc.information.autorucEscuela de ingeniería ; Irarrázaval Mena, Pablo ; S/I ; 57376
dc.information.autorucEscuela de ingeniería ; Uribe Arancibia, Sergio A. ; S/I ; 16572
dc.information.autorucEscuela de ingeniería ; Tejos Núñez, Cristián Andrés ; S/I ; 4027
dc.information.autorucEscuela de ingeniería ; Sing-Long C., Carlos A. ; S/I ; 126170
dc.language.isoen
dc.nota.accesoContenido parcial
dc.publisherIEEE
dc.relation.ispartofEuropean Signal Processing Conference (26° : 2018 : Roma, Italia)
dc.rightsacceso restringido
dc.subjectStandards
dc.subjectProbability density function
dc.subjectCoils
dc.subjectMagnetic resonance imaging
dc.subjectSignal to noise ratio
dc.subjectEncoding
dc.subjectProbability distribution
dc.titleVelocity Variability in MRI Phase-Contrastes_ES
dc.typecomunicación de congreso
sipa.codpersvinculados57376
sipa.codpersvinculados16572
sipa.codpersvinculados4027
sipa.codpersvinculados126170
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Velocity Variability in MRI Phase-Contrast.pdf
Size:
2.68 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de conferencia