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Left atrial structure and functional quantitation using cardiovascular magnetic resonance and multimodality tissue tracking: validation and reproducibility assessment.

Zareian M, Ciuffo L, Habibi M, Opdahl A, Chamera EH, Wu CO, Bluemke DA, Lima JA, Venkatesh BA - J Cardiovasc Magn Reson (2015)

Bottom Line: LA total, active and passive ejection fractions were calculated.Pearson's correlation and Bland-Altman analysis were used to compare the measurements.In a second sample of 25 subjects (age: 65.7 ± 7.1, 72% males) inter study, intra and inter reader reliability analysis was performed.

View Article: PubMed Central - PubMed

Affiliation: MR 110, Radiology, Johns Hopkins University, Baltimore, MD, 21287, USA. mytra_z@hotmail.com.

ABSTRACT

Background: Left atrium (LA) strain, volume and function are important markers of cardiovascular disease and myocardial impairment. We aimed to assess the accuracy of LA biplane volume and function measured by Multimodality Tissue Tracking (MTT). Also we assessed the inter-study reproducibility for cardiovascular magnetic resonance (CMR) derived LA volume and function parameters.

Methods: Thirty subjects (mean age: 71.3 ± 8.7, 87% male) including twenty subjects with cardiovascular events and ten healthy subjects, with CMR were evaluated in the Multi-Ethnic Study of Atherosclerosis (MESA). LA volumes were computed by the modified biplane method from 2- and 4-chamber projections and the Simpson's method from short-axis slices using both methods - manual and semi-automated delineation using MTT. LA total, active and passive ejection fractions were calculated. Pearson's correlation and Bland-Altman analysis were used to compare the measurements. In a second sample of 25 subjects (age: 65.7 ± 7.1, 72% males) inter study, intra and inter reader reliability analysis was performed. The intra-class correlation coefficient (ICC) was evaluated.

Results: Left atrial MTT structural and functional parameters were not different from manual delineation, yet image analysis was only half as time consuming on average with MTT. Maximal volume MTT was not different between the Simpson's and Biplane methods, functional parameters, however were different. MTT allowed us to measure multiple LA parameters with good-excellent (ICC; 0.88- 0.98, p < 0.001) intra-and inter reader reproducibility and fair-good (ICC; 0.44-0.82, p < 0.05-0.001) inter study reproducibility.

Conclusions: MTT derived LA biplane volume and function is accurate and reproducible and is suited for use in longitudinal studies.

No MeSH data available.


Related in: MedlinePlus

Multimodality Tissue Tracking, volume analysis (Panel a), volume rate analysis (Panel b), strain analysis (Panel c) and strain rate analysis (panel d). Green line: End-systole. White line: Point where volume-rate curve: 0; Corresponding VpreA in the volume curve
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Fig2: Multimodality Tissue Tracking, volume analysis (Panel a), volume rate analysis (Panel b), strain analysis (Panel c) and strain rate analysis (panel d). Green line: End-systole. White line: Point where volume-rate curve: 0; Corresponding VpreA in the volume curve

Mentions: Multimodality Tissue tracking software (MTT; version 6.0, Toshiba, Japan) is an automated frame-to frame template matching software [11, 12]. Initially, an experienced operator defines the LA endocardial and epicardial borders at the reference frame - ventricular end-systolic frame identified just before mitral valve opening, when the LA is at its biggest dimension (Fig. 2). The confluence of the pulmonary veins and LA appendage are not included in the segmentation.Fig. 2


Left atrial structure and functional quantitation using cardiovascular magnetic resonance and multimodality tissue tracking: validation and reproducibility assessment.

Zareian M, Ciuffo L, Habibi M, Opdahl A, Chamera EH, Wu CO, Bluemke DA, Lima JA, Venkatesh BA - J Cardiovasc Magn Reson (2015)

Multimodality Tissue Tracking, volume analysis (Panel a), volume rate analysis (Panel b), strain analysis (Panel c) and strain rate analysis (panel d). Green line: End-systole. White line: Point where volume-rate curve: 0; Corresponding VpreA in the volume curve
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4487838&req=5

Fig2: Multimodality Tissue Tracking, volume analysis (Panel a), volume rate analysis (Panel b), strain analysis (Panel c) and strain rate analysis (panel d). Green line: End-systole. White line: Point where volume-rate curve: 0; Corresponding VpreA in the volume curve
Mentions: Multimodality Tissue tracking software (MTT; version 6.0, Toshiba, Japan) is an automated frame-to frame template matching software [11, 12]. Initially, an experienced operator defines the LA endocardial and epicardial borders at the reference frame - ventricular end-systolic frame identified just before mitral valve opening, when the LA is at its biggest dimension (Fig. 2). The confluence of the pulmonary veins and LA appendage are not included in the segmentation.Fig. 2

Bottom Line: LA total, active and passive ejection fractions were calculated.Pearson's correlation and Bland-Altman analysis were used to compare the measurements.In a second sample of 25 subjects (age: 65.7 ± 7.1, 72% males) inter study, intra and inter reader reliability analysis was performed.

View Article: PubMed Central - PubMed

Affiliation: MR 110, Radiology, Johns Hopkins University, Baltimore, MD, 21287, USA. mytra_z@hotmail.com.

ABSTRACT

Background: Left atrium (LA) strain, volume and function are important markers of cardiovascular disease and myocardial impairment. We aimed to assess the accuracy of LA biplane volume and function measured by Multimodality Tissue Tracking (MTT). Also we assessed the inter-study reproducibility for cardiovascular magnetic resonance (CMR) derived LA volume and function parameters.

Methods: Thirty subjects (mean age: 71.3 ± 8.7, 87% male) including twenty subjects with cardiovascular events and ten healthy subjects, with CMR were evaluated in the Multi-Ethnic Study of Atherosclerosis (MESA). LA volumes were computed by the modified biplane method from 2- and 4-chamber projections and the Simpson's method from short-axis slices using both methods - manual and semi-automated delineation using MTT. LA total, active and passive ejection fractions were calculated. Pearson's correlation and Bland-Altman analysis were used to compare the measurements. In a second sample of 25 subjects (age: 65.7 ± 7.1, 72% males) inter study, intra and inter reader reliability analysis was performed. The intra-class correlation coefficient (ICC) was evaluated.

Results: Left atrial MTT structural and functional parameters were not different from manual delineation, yet image analysis was only half as time consuming on average with MTT. Maximal volume MTT was not different between the Simpson's and Biplane methods, functional parameters, however were different. MTT allowed us to measure multiple LA parameters with good-excellent (ICC; 0.88- 0.98, p < 0.001) intra-and inter reader reproducibility and fair-good (ICC; 0.44-0.82, p < 0.05-0.001) inter study reproducibility.

Conclusions: MTT derived LA biplane volume and function is accurate and reproducible and is suited for use in longitudinal studies.

No MeSH data available.


Related in: MedlinePlus