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Evaluation of left atrial volumes using multidetector computed tomography: comparison with echocardiography.

Gweon HM, Kim SJ, Kim TH, Lee SM, Hong YJ, Rim SJ - Korean J Radiol (2010)

Bottom Line: The LA end-systolic and end-diastolic volumes (LAESV and LAEDV) measured by the 2D-LB method correlated well with those measured by the 3D-VTB method using cardiac MDCT (r = 0.763, r = 0.786, p = 0.001).However, there was a significant difference in the LAESVs between the two measurement methods using cardiac MDCT (p < 0.05).A significant correlation was found between the two different measurement methods for evaluating LA volumes by cardiac MDCT.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology and Research Institute of Radiological Science, Yonsei University Health System, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, Korea.

ABSTRACT

Objective: To prospectively assess the relationship between the two different measurement methods for the evaluation of left atrial (LA) volume using cardiac multidetector computed tomography (MDCT) and to compare the results between cardiac MDCT and echocardiography.

Materials and methods: Thirty-five patients (20 men, 15 women; mean age, 60 years) underwent cardiac MDCT angiography for coronary artery disease. The LA volumes were measured using two different methods: the two dimensional (2D) length-based (LB) method measured along the three-orthogonal planes of the LA and the 3D volumetric threshold-based (VTB) method measured according to the threshold 3D segmentation of the LA. The results obtained by cardiac MDCT were compared with those obtained by echocardiography.

Results: The LA end-systolic and end-diastolic volumes (LAESV and LAEDV) measured by the 2D-LB method correlated well with those measured by the 3D-VTB method using cardiac MDCT (r = 0.763, r = 0.786, p = 0.001). However, there was a significant difference in the LAESVs between the two measurement methods using cardiac MDCT (p < 0.05). The LAESV measured by cardiac MDCT correlated well with measurements by echocardiography (r = 0.864, p = 0.001), however with a significant difference (p < 0.01) in their volumes. The cardiac MDCT overestimated the LAESV by 22% compared to measurements by echocardiography.

Conclusion: A significant correlation was found between the two different measurement methods for evaluating LA volumes by cardiac MDCT. Further, cardiac MDCT correlates well with echocardiography in evaluating the LA volume. However, there are significant differences in the LAESV between the two measurement methods using cardiac MDCT and between cardiac MDCT and echocardiography.

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Measurement of left atrial size using 2D length-based method of cardiac multidetector CT.A. Oblique axial image of left atrium. Transverse diameter of left atrium was measured at distance between right and left pulmonary veins. Anterior-posterior diameter of left atrium was measured at midpoint of transverse diameter.B. Sagittal view of left atrium. Longitudinal diameter of left atrium was measured at midpoint of transverse diameter.
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Figure 1: Measurement of left atrial size using 2D length-based method of cardiac multidetector CT.A. Oblique axial image of left atrium. Transverse diameter of left atrium was measured at distance between right and left pulmonary veins. Anterior-posterior diameter of left atrium was measured at midpoint of transverse diameter.B. Sagittal view of left atrium. Longitudinal diameter of left atrium was measured at midpoint of transverse diameter.

Mentions: Left atrial volumes were measured using two different methods with retrospective ECG-gated cardiac MDCT. The methods were the 2D LB and 3D VTB methods. For the 2D LB method, the size of the LA was measured along the three-orthogonal planes (transverse, anterior-posterior, and longitudinal) based on the techniques suggested by Ho et al. (16) and Jayam et al. (17). The transverse diameter of the LA was defined as the distance between the midpoint of the pulmonary veins on the right and left sides of the atrium using an oblique axial image. The anterior-posterior and longitudinal (cranio-caudal) diameters were measured at the midpoint of the transverse diameter using the oblique axial and sagittal images of the LA (Fig. 1). The oblique axial images were obtained when four pulmonary veins were connected to the LA on one image plane. The volume of the LA was assessed using the following equation: LA volume = π×TD×AP/2×LD/2, where TD is the transverse diameter, AP is the anterior-posterior diameter, and LD is the longitudinal diameter.


Evaluation of left atrial volumes using multidetector computed tomography: comparison with echocardiography.

Gweon HM, Kim SJ, Kim TH, Lee SM, Hong YJ, Rim SJ - Korean J Radiol (2010)

Measurement of left atrial size using 2D length-based method of cardiac multidetector CT.A. Oblique axial image of left atrium. Transverse diameter of left atrium was measured at distance between right and left pulmonary veins. Anterior-posterior diameter of left atrium was measured at midpoint of transverse diameter.B. Sagittal view of left atrium. Longitudinal diameter of left atrium was measured at midpoint of transverse diameter.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2864855&req=5

Figure 1: Measurement of left atrial size using 2D length-based method of cardiac multidetector CT.A. Oblique axial image of left atrium. Transverse diameter of left atrium was measured at distance between right and left pulmonary veins. Anterior-posterior diameter of left atrium was measured at midpoint of transverse diameter.B. Sagittal view of left atrium. Longitudinal diameter of left atrium was measured at midpoint of transverse diameter.
Mentions: Left atrial volumes were measured using two different methods with retrospective ECG-gated cardiac MDCT. The methods were the 2D LB and 3D VTB methods. For the 2D LB method, the size of the LA was measured along the three-orthogonal planes (transverse, anterior-posterior, and longitudinal) based on the techniques suggested by Ho et al. (16) and Jayam et al. (17). The transverse diameter of the LA was defined as the distance between the midpoint of the pulmonary veins on the right and left sides of the atrium using an oblique axial image. The anterior-posterior and longitudinal (cranio-caudal) diameters were measured at the midpoint of the transverse diameter using the oblique axial and sagittal images of the LA (Fig. 1). The oblique axial images were obtained when four pulmonary veins were connected to the LA on one image plane. The volume of the LA was assessed using the following equation: LA volume = π×TD×AP/2×LD/2, where TD is the transverse diameter, AP is the anterior-posterior diameter, and LD is the longitudinal diameter.

Bottom Line: The LA end-systolic and end-diastolic volumes (LAESV and LAEDV) measured by the 2D-LB method correlated well with those measured by the 3D-VTB method using cardiac MDCT (r = 0.763, r = 0.786, p = 0.001).However, there was a significant difference in the LAESVs between the two measurement methods using cardiac MDCT (p < 0.05).A significant correlation was found between the two different measurement methods for evaluating LA volumes by cardiac MDCT.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology and Research Institute of Radiological Science, Yonsei University Health System, Yonsei University College of Medicine, Gangnam Severance Hospital, Seoul, Korea.

ABSTRACT

Objective: To prospectively assess the relationship between the two different measurement methods for the evaluation of left atrial (LA) volume using cardiac multidetector computed tomography (MDCT) and to compare the results between cardiac MDCT and echocardiography.

Materials and methods: Thirty-five patients (20 men, 15 women; mean age, 60 years) underwent cardiac MDCT angiography for coronary artery disease. The LA volumes were measured using two different methods: the two dimensional (2D) length-based (LB) method measured along the three-orthogonal planes of the LA and the 3D volumetric threshold-based (VTB) method measured according to the threshold 3D segmentation of the LA. The results obtained by cardiac MDCT were compared with those obtained by echocardiography.

Results: The LA end-systolic and end-diastolic volumes (LAESV and LAEDV) measured by the 2D-LB method correlated well with those measured by the 3D-VTB method using cardiac MDCT (r = 0.763, r = 0.786, p = 0.001). However, there was a significant difference in the LAESVs between the two measurement methods using cardiac MDCT (p < 0.05). The LAESV measured by cardiac MDCT correlated well with measurements by echocardiography (r = 0.864, p = 0.001), however with a significant difference (p < 0.01) in their volumes. The cardiac MDCT overestimated the LAESV by 22% compared to measurements by echocardiography.

Conclusion: A significant correlation was found between the two different measurement methods for evaluating LA volumes by cardiac MDCT. Further, cardiac MDCT correlates well with echocardiography in evaluating the LA volume. However, there are significant differences in the LAESV between the two measurement methods using cardiac MDCT and between cardiac MDCT and echocardiography.

Show MeSH
Related in: MedlinePlus