New Respiratory Gating Technique for Whole Heart Cine Imaging: Integration of a Navigator Slice in Steady State Free Precession Sequences

Uribe, Sergio

Autor

Uribe, Sergio

Tejos, Cristian

Razavi, Reza

Schaeffter, Tobias

Título

New Respiratory Gating Technique for Whole Heart Cine Imaging: Integration of a Navigator Slice in Steady State Free Precession Sequences

Revista

JOURNAL OF MAGNETIC RESONANCE IMAGING

ISSN

1053-1807

Volumen

34

Número de publicación

1

Página inicio

211

Página final

219

Fecha de publicación

2011

Resumen

Purpose: To evaluate the performance of a slice navigator sequence integrated into a b-SSFP sequence for obtaining real time respiratory self-gated whole heart cine imaging.

Materials and Methods: In this work, we present a novel and robust approach for respiratory motion detection by integrating a slice navigator sequence into a balanced steady state free precession (b-SSFP) sequence, while maintaining the steady state. The slice navigator sequence is integrated into consecutive repetition times (TRs) of a b-SSFP sequence to excite and read out a navigator slice. We performed several phantom experiments to test the performance of the slice navigator sequence. Additionally, the method was evaluated in five volunteers and compared with breathing signals obtained from conventional pencil beam navigator sequence. Finally, the navigator slice was used to obtain whole heart MR cine images.

Results: The breathing signals detected by the proposed method showed an excellent agreement with those obtained from pencil beam navigators. Moreover, the technique was capable of removing respiratory motion artifacts with minimal distortion of the steady state. Image quality comparison showed a statistical significant improvement from a quality score of 2.1 obtained by the nonrespiratory gated images, compared to a quality score of 3.4 obtained by the respiratory gated images.

Conclusion: This novel method represents a robust approach to estimate breathing motion during SSFP Imaging. The technique was successfully applied to acquire whole heart artifact-free cine images.

Derechos

acceso restringido

Agencia financiadora

BHF Center of Excellence

BRC center

VRAID-PUC

Medical Research Council

DOI

10.1002/jmri.22625

Editorial

WILEY-BLACKWELL

Enlace

https://doi.org/10.1002/jmri.22625

https://repositorio.uc.cl/handle/11534/76221

Id de publicación en Pubmed

MEDLINE:21618337

Id de publicación en WoS

WOS:000292421800026

Paginación

9 páginas

Palabra clave

respiratory self-gating

whole heart imaging

k(o) projections

BALANCED SSFP

COMPENSATION

ANGIOGRAPHY

MRI

Tema ODS

03 Good Health and Well-being

Tema ODS español

03 Salud y bienestar

Tipo de documento

artículo

New Respiratory Gating Technique for Whole Heart Cine Imaging: Integration of a Navigator Slice in Steady State Free Precession Sequences

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Autor	Uribe, Sergio Tejos, Cristian Razavi, Reza Schaeffter, Tobias
Título	New Respiratory Gating Technique for Whole Heart Cine Imaging: Integration of a Navigator Slice in Steady State Free Precession Sequences
Revista	JOURNAL OF MAGNETIC RESONANCE IMAGING
ISSN	1053-1807
Volumen	34
Número de publicación	1
Página inicio	211
Página final	219
Fecha de publicación	2011
Resumen	Purpose: To evaluate the performance of a slice navigator sequence integrated into a b-SSFP sequence for obtaining real time respiratory self-gated whole heart cine imaging. Materials and Methods: In this work, we present a novel and robust approach for respiratory motion detection by integrating a slice navigator sequence into a balanced steady state free precession (b-SSFP) sequence, while maintaining the steady state. The slice navigator sequence is integrated into consecutive repetition times (TRs) of a b-SSFP sequence to excite and read out a navigator slice. We performed several phantom experiments to test the performance of the slice navigator sequence. Additionally, the method was evaluated in five volunteers and compared with breathing signals obtained from conventional pencil beam navigator sequence. Finally, the navigator slice was used to obtain whole heart MR cine images. Results: The breathing signals detected by the proposed method showed an excellent agreement with those obtained from pencil beam navigators. Moreover, the technique was capable of removing respiratory motion artifacts with minimal distortion of the steady state. Image quality comparison showed a statistical significant improvement from a quality score of 2.1 obtained by the nonrespiratory gated images, compared to a quality score of 3.4 obtained by the respiratory gated images. Conclusion: This novel method represents a robust approach to estimate breathing motion during SSFP Imaging. The technique was successfully applied to acquire whole heart artifact-free cine images.
Derechos	acceso restringido
Agencia financiadora	BHF Center of Excellence BRC center VRAID-PUC Medical Research Council
DOI	10.1002/jmri.22625
Editorial	WILEY-BLACKWELL
Enlace	https://doi.org/10.1002/jmri.22625 https://repositorio.uc.cl/handle/11534/76221
Id de publicación en Pubmed	MEDLINE:21618337
Id de publicación en WoS	WOS:000292421800026
Paginación	9 páginas
Palabra clave	respiratory self-gating whole heart imaging k(o) projections BALANCED SSFP COMPENSATION ANGIOGRAPHY MRI
Tema ODS	03 Good Health and Well-being
Tema ODS español	03 Salud y bienestar
Tipo de documento	artículo