Automated left atrial time-resolved segmentation in MRI long-axis cine images using active contours
Gonzales, Ricardo A. LU
; Seemann, Felicia
LU
; Lamy, Jérôme
; Arvidsson, Per M.
LU
; Heiberg, Einar
LU
; Murray, Victor
and Peters, Dana C.
(2021)
In BMC Medical Imaging
21(1).
- Abstract
Background: Segmentation of the left atrium (LA) is required to evaluate atrial size and function, which are important imaging biomarkers for a wide range of cardiovascular conditions, such as atrial fibrillation, stroke, and diastolic dysfunction. LA segmentations are currently being performed manually, which is time-consuming and observer-dependent. Methods: This study presents an automated image processing algorithm for time-resolved LA segmentation in cardiac magnetic resonance imaging (MRI) long-axis cine images of the 2-chamber (2ch) and 4-chamber (4ch) views using active contours. The proposed algorithm combines mitral valve tracking, automated threshold calculation, edge detection on a radially resampled image, edge tracking... (More)
Background: Segmentation of the left atrium (LA) is required to evaluate atrial size and function, which are important imaging biomarkers for a wide range of cardiovascular conditions, such as atrial fibrillation, stroke, and diastolic dysfunction. LA segmentations are currently being performed manually, which is time-consuming and observer-dependent. Methods: This study presents an automated image processing algorithm for time-resolved LA segmentation in cardiac magnetic resonance imaging (MRI) long-axis cine images of the 2-chamber (2ch) and 4-chamber (4ch) views using active contours. The proposed algorithm combines mitral valve tracking, automated threshold calculation, edge detection on a radially resampled image, edge tracking based on Dijkstra’s algorithm, and post-processing involving smoothing and interpolation. The algorithm was evaluated in 37 patients diagnosed mainly with paroxysmal atrial fibrillation. Segmentation accuracy was assessed using the Dice similarity coefficient (DSC) and Hausdorff distance (HD), with manual segmentations in all time frames as the reference standard. For inter-observer variability analysis, a second observer performed manual segmentations at end-diastole and end-systole on all subjects. Results: The proposed automated method achieved high performance in segmenting the LA in long-axis cine sequences, with a DSC of 0.96 for 2ch and 0.95 for 4ch, and an HD of 5.5 mm for 2ch and 6.4 mm for 4ch. The manual inter-observer variability analysis had an average DSC of 0.95 and an average HD of 4.9 mm. Conclusion: The proposed automated method achieved performance on par with human experts analyzing MRI images for evaluation of atrial size and function. [MediaObject not available: see fulltext.]
(Less)
- author
- Gonzales, Ricardo A.
LU
; Seemann, Felicia
LU
; Lamy, Jérôme
; Arvidsson, Per M.
LU
; Heiberg, Einar
LU
; Murray, Victor
and Peters, Dana C.
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Active contours, Cardiovascular imaging, Left atrium, Magnetic resonance imaging, Segmentation
- in
- BMC Medical Imaging
- volume
- 21
- issue
- 1
- article number
- 101
- publisher
- BioMed Central (BMC)
- external identifiers
-
- pmid:34147081
- scopus:85108315210
- ISSN
- 1471-2342
- DOI
- 10.1186/s12880-021-00630-3
- language
- English
- LU publication?
- yes
- id
- a77281dd-fbdd-42b4-b634-98e72b6105c4
- date added to LUP
- 2021-07-16 13:50:38
- date last changed
- 2024-04-20 09:37:10
@article{a77281dd-fbdd-42b4-b634-98e72b6105c4,
abstract = {{<p>Background: Segmentation of the left atrium (LA) is required to evaluate atrial size and function, which are important imaging biomarkers for a wide range of cardiovascular conditions, such as atrial fibrillation, stroke, and diastolic dysfunction. LA segmentations are currently being performed manually, which is time-consuming and observer-dependent. Methods: This study presents an automated image processing algorithm for time-resolved LA segmentation in cardiac magnetic resonance imaging (MRI) long-axis cine images of the 2-chamber (2ch) and 4-chamber (4ch) views using active contours. The proposed algorithm combines mitral valve tracking, automated threshold calculation, edge detection on a radially resampled image, edge tracking based on Dijkstra’s algorithm, and post-processing involving smoothing and interpolation. The algorithm was evaluated in 37 patients diagnosed mainly with paroxysmal atrial fibrillation. Segmentation accuracy was assessed using the Dice similarity coefficient (DSC) and Hausdorff distance (HD), with manual segmentations in all time frames as the reference standard. For inter-observer variability analysis, a second observer performed manual segmentations at end-diastole and end-systole on all subjects. Results: The proposed automated method achieved high performance in segmenting the LA in long-axis cine sequences, with a DSC of 0.96 for 2ch and 0.95 for 4ch, and an HD of 5.5 mm for 2ch and 6.4 mm for 4ch. The manual inter-observer variability analysis had an average DSC of 0.95 and an average HD of 4.9 mm. Conclusion: The proposed automated method achieved performance on par with human experts analyzing MRI images for evaluation of atrial size and function. [MediaObject not available: see fulltext.]</p>}},
author = {{Gonzales, Ricardo A. and Seemann, Felicia and Lamy, Jérôme and Arvidsson, Per M. and Heiberg, Einar and Murray, Victor and Peters, Dana C.}},
issn = {{1471-2342}},
keywords = {{Active contours; Cardiovascular imaging; Left atrium; Magnetic resonance imaging; Segmentation}},
language = {{eng}},
number = {{1}},
publisher = {{BioMed Central (BMC)}},
series = {{BMC Medical Imaging}},
title = {{Automated left atrial time-resolved segmentation in MRI long-axis cine images using active contours}},
url = {{http://dx.doi.org/10.1186/s12880-021-00630-3}},
doi = {{10.1186/s12880-021-00630-3}},
volume = {{21}},
year = {{2021}},
}