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Kinematics of the heart : Strain-rate imaging from time-resolved three-dimensional phase contrast MRI

Selskog, Pernilla ; Heiberg, Einar LU ; Ebbers, Tino ; Wigström, Lars and Karlsson, Matts (2002) In IEEE Transactions on Medical Imaging 21(9). p.1105-1109
Abstract

A four-dimensional mapping (three spatial dimensions + time) of myocardial strain-rate would help to describe the mechanical properties of the myocardium, which affect important physiological factors such as the pumping performance of the ventricles. Strain-rate represents the local instantaneous deformation of the myocardium and can be calculated from the spatial gradients of the velocity field. Strain-rate has previously been calculated using one-dimensional (ultrasound) or two-dimensional (2-D) magnetic resonance imaging) techniques. However, this assumes that myocardial motion only occurs in one direction or in one plane, respectively. This paper presents a method for calculation of the time-resolved three-dimensional (3-D)... (More)

A four-dimensional mapping (three spatial dimensions + time) of myocardial strain-rate would help to describe the mechanical properties of the myocardium, which affect important physiological factors such as the pumping performance of the ventricles. Strain-rate represents the local instantaneous deformation of the myocardium and can be calculated from the spatial gradients of the velocity field. Strain-rate has previously been calculated using one-dimensional (ultrasound) or two-dimensional (2-D) magnetic resonance imaging) techniques. However, this assumes that myocardial motion only occurs in one direction or in one plane, respectively. This paper presents a method for calculation of the time-resolved three-dimensional (3-D) strain-rate tensor using velocity vector information in a 3-D spatial grid during the whole cardiac cycle. The strain-rate tensor provides full information of both magnitude and direction of the instantaneous deformation of the myocardium. A method for visualization of the full 3-D tensor is also suggested. The tensors are visualized using ellipsoids, which display the principal directions of strain-rate and the ratio between strain-rate magnitude in each direction. The presented method reveals the principal strain-rate directions without a priori knowledge of myocardial motion directions.

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author
; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
Cardiovascular system, Kinematics, Magnetic resonance imaging
in
IEEE Transactions on Medical Imaging
volume
21
issue
9
pages
1105 - 1109
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:0036770734
  • pmid:12564878
ISSN
0278-0062
DOI
10.1109/TMI.2002.804431
language
English
LU publication?
no
id
db6dbbf6-f95a-4dd4-8c0c-34ca2c0eaf04
date added to LUP
2022-10-21 10:23:43
date last changed
2024-05-30 19:26:24
@article{db6dbbf6-f95a-4dd4-8c0c-34ca2c0eaf04,
  abstract     = {{<p>A four-dimensional mapping (three spatial dimensions + time) of myocardial strain-rate would help to describe the mechanical properties of the myocardium, which affect important physiological factors such as the pumping performance of the ventricles. Strain-rate represents the local instantaneous deformation of the myocardium and can be calculated from the spatial gradients of the velocity field. Strain-rate has previously been calculated using one-dimensional (ultrasound) or two-dimensional (2-D) magnetic resonance imaging) techniques. However, this assumes that myocardial motion only occurs in one direction or in one plane, respectively. This paper presents a method for calculation of the time-resolved three-dimensional (3-D) strain-rate tensor using velocity vector information in a 3-D spatial grid during the whole cardiac cycle. The strain-rate tensor provides full information of both magnitude and direction of the instantaneous deformation of the myocardium. A method for visualization of the full 3-D tensor is also suggested. The tensors are visualized using ellipsoids, which display the principal directions of strain-rate and the ratio between strain-rate magnitude in each direction. The presented method reveals the principal strain-rate directions without a priori knowledge of myocardial motion directions.</p>}},
  author       = {{Selskog, Pernilla and Heiberg, Einar and Ebbers, Tino and Wigström, Lars and Karlsson, Matts}},
  issn         = {{0278-0062}},
  keywords     = {{Cardiovascular system; Kinematics; Magnetic resonance imaging}},
  language     = {{eng}},
  number       = {{9}},
  pages        = {{1105--1109}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Medical Imaging}},
  title        = {{Kinematics of the heart : Strain-rate imaging from time-resolved three-dimensional phase contrast MRI}},
  url          = {{http://dx.doi.org/10.1109/TMI.2002.804431}},
  doi          = {{10.1109/TMI.2002.804431}},
  volume       = {{21}},
  year         = {{2002}},
}