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Author
C. Santa-Marta; Jaume Garcia; A. Bajo; J.J. Vaquero; M. Ledesma-Carbayo; Debora Gil
Title
Influence of the Temporal Resolution on the Quantification of Displacement Fields in Cardiac Magnetic Resonance Tagged Images
Type
Conference Article
Year
2008
Publication
XXVI Congreso Anual de la Sociedad Española de Ingenieria Biomedica
Abbreviated Journal
Volume
Issue
Pages
352–353
Keywords
Abstract
It is difficult to acquire tagged cardiac MR images with a high temporal and spatial resolution using clinical MR scanners. However, if such images are used for quantifying scores based on motion, it is essential a resolution as high as possibl e. This paper explores the influence of the temporal resolution of a tagged series on the quantification of myocardial dynamic parameters. To such purpose we have designed a SPAMM (Spatial Modulation of Magnetization) sequence allowing acquisition of sequences at simple and double temporal resolution. Sequences are processed to compute myocardial motion by an automatic technique based on the tracking of the harmonic phase of tagged images (the Harmonic Phase Flow, HPF). The results have been compared to manual tracking of myocardial tags. The error in displacement fields for double resolution sequences reduces 17%.
Address
Valladolid
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Roberto hornero, Saniel Abasolo
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
CASEIB
Notes
IAM;
Approved
no
Call Number
IAM @ iam @ SGB2008
Serial
1033
Permanent link to this record
Author
Aura Hernandez-Sabate; Debora Gil; Jaume Garcia; Enric Marti
Title
Image-based Cardiac Phase Retrieval in Intravascular Ultrasound Sequences
Type
Journal Article
Year
2011
Publication
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
Abbreviated Journal
T-UFFC
Volume
58
Issue
1
Pages
60-72
Keywords
3-D exploring; ECG; band-pass filter; cardiac motion; cardiac phase retrieval; coronary arteries; electrocardiogram signal; image intensity local mean evolution; image-based cardiac phase retrieval; in vivo pullbacks acquisition; intravascular ultrasound sequences; longitudinal motion; signal extrema; time 36 ms; band-pass filters; biomedical ultrasonics; cardiovascular system; electrocardiography; image motion analysis; image retrieval; image sequences; medical image processing; ultrasonic imaging
Abstract
Longitudinal motion during in vivo pullbacks acquisition of intravascular ultrasound (IVUS) sequences is a major artifact for 3-D exploring of coronary arteries. Most current techniques are based on the electrocardiogram (ECG) signal to obtain a gated pullback without longitudinal motion by using specific hardware or the ECG signal itself. We present an image-based approach for cardiac phase retrieval from coronary IVUS sequences without an ECG signal. A signal reflecting cardiac motion is computed by exploring the image intensity local mean evolution. The signal is filtered by a band-pass filter centered at the main cardiac frequency. Phase is retrieved by computing signal extrema. The average frame processing time using our setup is 36 ms. Comparison to manually sampled sequences encourages a deeper study comparing them to ECG signals.
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0885-3010
ISBN
Medium
Area
Expedition
Conference
Notes
IAM;ADAS
Approved
no
Call Number
IAM @ iam @ HGG2011
Serial
1546
Permanent link to this record
Author
Albert Andaluz; Francesc Carreras; Debora Gil; Jaume Garcia
Title
Una aplicació amigable pel càlcul de indicadors clínics del ventricle esquerre
Type
Miscellaneous
Year
2010
Publication
Forum Biocat 2010
Abbreviated Journal
Volume
Issue
Pages
Keywords
Abstract
Address
Lonja de Mar,Barcelona (Spain)
Corporate Author
CVC
Thesis
Publisher
Biocat
Place of Publication
Barcelona
Editor
Language
Catalan
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
IAM
Approved
no
Call Number
IAM @ iam @ ACG2010
Serial
1483
Permanent link to this record
Author
Agata Lapedriza; Jaume Garcia; Ernest Valveny; Robert Benavente; Miquel Ferrer; Gemma Sanchez
Title
Una experiencia de aprenentatge basada en projectes en el ambit de la informatica
Type
Miscellaneous
Year
2008
Publication
V Jornades d’Innovacio Docent (UAB)
Abbreviated Journal
Volume
Issue
Pages
63
Keywords
Abstract
Address
Bellaterra (Spain)
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
ISBN
Medium
Area
Expedition
Conference
Notes
OR; IAM; DAG; CIC; MV
Approved
no
Call Number
BCNPCL @ bcnpcl @ LGV2008
Serial
1030
Permanent link to this record
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