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Author
Jaume Garcia; Petia Radeva; Francesc Carreras
Title
Combining Spectral and Active Shape methods to Track Tagged MRI
Type
Book Chapter
Year
2004
Publication
Recent Advances in Artificial Intelligence Research and Development
Abbreviated Journal
Volume
Issue
Pages
37-44
Keywords
MR; tagged MR; ASM; LV segmentation; motion estimation.
Abstract
Tagged magnetic resonance is a very usefull and unique tool that provides a complete local and global knowledge of the left ventricle (LV) motion. In this article we introduce a method capable of tracking and segmenting the LV. Spectral methods are applied in order to obtain the so called HARP images which encode information about movement and are the base for LV point-tracking. For segmentation we use Active Shapes (ASM) that model LV shape variation in order to overcome possible local misplacements of the boundary. We finally show experiments on both synthetic and real data which appear to be very promising.
Address
Corporate Author
Thesis
Publisher
IOS Press
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
CCIA
Notes
IAM;MILAB
Approved
no
Call Number
IAM @ iam @ GRC2004
Serial
1488
Permanent link to this record
Author
David Rotger; Misael Rosales; Jaume Garcia; Oriol Pujol ; J. Mauri; Petia Radeva
Title
Active Vessel: A New Multimedia Workstation for Intravascular Ultrasound and Angiography Fusion
Type
Journal Article
Year
2003
Publication
Computers in Cardiology
Abbreviated Journal
Volume
30
Issue
Pages
65-68
Keywords
Abstract
AcriveVessel is a new multimedia workstation which enables the visualization, acquisition and handling of both image modalities, on- and ofline. It enables DICOM v3.0 decompression and browsing, video acquisition,repmduction and storage for IntraVascular UltraSound (IVUS) and angiograms with their corresponding ECG,automatic catheter segmentation in angiography images (using fast marching algorithm). BSpline models definition for vessel layers on IVUS images sequence and an extensively validated tool to fuse information. This approach defines the correspondence of every IVUS image with its correspondent point in the angiogram and viceversa. The 3 0 reconstruction of the NUS catheterhessel enables real distance measurements as well as threedimensional visualization showing vessel tortuosity in the space.
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
ISBN
Medium
Area
Expedition
Conference
Notes
IAM;MILAB;HuPBA
Approved
no
Call Number
IAM @ iam @ RRG2003
Serial
1647
Permanent link to this record
Author
Jaume Garcia; David Rotger; Francesc Carreras; R.Leta; Petia Radeva
Title
Contrast echography segmentation and tracking by trained deformable models
Type
Conference Article
Year
2003
Publication
Proc. Computers in Cardiology
Abbreviated Journal
Volume
30
Issue
Pages
173-176
Keywords
Abstract
The objective of this work is to segment the human left ventricle myocardium (LVM) in contrast echocardiography imaging and thus track it along a cardiac cycle in order to extract quantitative data about heart function. Ultrasound images are hard to work with due to their speckle appearance. To overcome this we report the combination of active contour models (ACM) or snakes and active shape models (ASM). The ability of ACM in giving closed and smooth curves in addition to the power of the ASM in producing shapes similar to the ones learned, evoke to a robust algorithm. Meanwhile the snake is attracted towards image main features, ASM acts as a correction factor. The algorithm was tested independently on 180 frames and satisfying results were obtained: in 95% the maximum difference between automatic and experts segmentation was less than 12 pixels.
Address
Corporate Author
Thesis
Publisher
Place of Publication
Centre de Visió per Computador – Dept. Informàtica, UAB Edifici O – Campus UAB, 08193 Bellater
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0276-6547
ISBN
0-7803-8170-X
Medium
Area
Expedition
Conference
Notes
IAM;MILAB
Approved
no
Call Number
IAM @ iam @ GRC2003
Serial
1512
Permanent link to this record
Author
Jaume Garcia
Title
Propagacio de fronts per a la segmentacio en imatges IVUS
Type
Report
Year
2002
Publication
Technical Report
Abbreviated Journal
Volume
Issue
65
Pages
Keywords
Abstract
Address
CVC (UAB)
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
IAM
Approved
no
Call Number
IAM @ iam @ Gar2002
Serial
328
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