Kinematics of the heart : Strain-rate imaging from time-resolved three-dimensional phase contrast MRI
(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.
(Less)
- author
- Selskog, Pernilla ; Heiberg, Einar LU ; Ebbers, Tino ; Wigström, Lars and Karlsson, Matts
- publishing date
- 2002
- 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
-
- pmid:12564878
- scopus:0036770734
- 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}}, }