Validation of Right Ventricular Volume Measurements by Magnetic Resonance Imaging in Small Hearts Using a Fetal Lamb Model

Nr, Stauffer; Sb, Greenberg; La, Marks; Gk, Singh; Dl, Siderio

doi:10.1097/00004424-199502000-00004

Cited by 4 publications

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“…CMR has been proposed as the gold standard for assessing the RV because of its favorable accuracy (3, 8–11) and reproducibility (1, 7, 8, 11–13). It also offers high spatial resolution and excellent myocardium‐to‐blood signal contrast, and allows the use of a 3D approach, which avoids the complex and often unreliable geometry of the RV cavity.…”

Section: Discussionmentioning

confidence: 99%

“…Since it also offers three‐dimensional (3D) acquisition capability, CMR is also well suited for assessing a chamber with a more complex shape, such as the right ventricle (RV). Indeed, relative to measurements of RV volume and mass, CMR has shown a good correlation with in vitro (8, 9) and in vivo (3, 8, 10, 11) techniques, and good in vivo reproducibility (1, 7, 8, 11–13).…”

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Improved reproducibility of right ventricular volumes and function estimation from cardiac magnetic resonance images using level‐set models

Catalano

Corsi

Antonaci

et al. 2007

Magnetic Resonance in Med

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This study aims to assess whether an alternative method, that is based on volumetric surface detection (VoSD) without tracing and is totally free of geometric assumptions, can improve the reproducibility of right ventricular (RV) volume quantification from cardiac magnetic resonance (CMR) images, in comparison with a conventional disk-area technique. In a sample of 23 patients, with wide variability of RV end-diastolic volume (EDV: 47-131 ml), endsystolic volume (ESV: 20 -76 ml), and ejection fraction (EF: 29 -73%), using the standard method (Argus, Siemens) as the reference, the VoSD method showed good agreement for EDV, ESV, and EF estimations (correlation coefficient: 0.91, 0.94, and 0.94; Bland-Altman biases: 1 ml, 1 ml, and 0%; limits of agreement: ؎16 ml, ؎11 ml, and ؎11%, respectively). An analysis of the reproducibility of the two methods showed lower intraobserver variability for the VoSD method than for the conventional method, as evidenced by the coefficient of variability (CoV) values (2-6% vs. 8 -15%; P < 0.05). In addition, the VoSD method showed improved interobserver reproducibility (7-10% vs. 8 -15%), but the difference was statistically significant only for EF estimation variability (8 vs. 15%, P < 0.05). In conclusion, the newly developed VoSD technique allows accurate measurements of RV volumes and function, and appears to be more reproducible than the conven- Cardiac magnetic resonance (CMR) is the gold standard for assessing left ventricle (LV) volume, function, and mass because of its excellent accuracy (1-3) and reproducibility (1,4 -7). Since it also offers three-dimensional (3D) acquisition capability, CMR is also well suited for assessing a chamber with a more complex shape, such as the right ventricle (RV). Indeed, relative to measurements of RV volume and mass, CMR has shown a good correlation with in vitro (8,9) and in vivo (3,8,10,11) techniques, and good in vivo reproducibility (1,7,8,(11)(12)(13).However, the reproducibility of measurements by the disk-area summation technique is better for the LV than the RV, particularly in terms of ejection fraction (EF) estimation (13).We sought to assess the clinical feasibility of an alternative method that does not involve geometric assumptions (14) and is based on volumetric reconstruction and semiautomated endocardial volumetric surface detection (VoSD) of the RV chamber. We expected this method, which has been shown to provide good boundary detection in echocardiographic (15,16) and CMR studies (17,18) of the LV, to provide more reproducible estimation of RV parameters than the conventional method. MATERIALS AND METHODS Study PopulationThe study was approved by the institutional review board. Twenty-three consecutive patients (20 males and three females, 65 Ϯ 16 years old) who had undergone CMR for various cardiac pathologies were included in the study. There were 10 patients with healed myocardial infarction, three with angina, eight with dilated cardiomyopathy, one with valvular disease, and one with arrhythmic disorders. To assess th...

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confidence: 99%

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confidence: 99%

Improved reproducibility of right ventricular volumes and function estimation from cardiac magnetic resonance images using level‐set models

Catalano

Corsi

Antonaci

et al. 2007

Magnetic Resonance in Med

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Right ventricular volumes and ejection fraction with fast cine MR imaging in breath-hold technique: Applicability, normal values from 52 volunteers, and evaluation of 325 adult cardiac patients

Rominger

Bachmann

Pabst

et al. 1999

J. Magn. Reson. Imaging

123

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In Vitro Feasibility and Accuracy of Three‐Dimensional Echocardiography for Ventricular Volume Assessment in Very Small Hearts

et al. 1999

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To evaluate the in vitro accuracy of three-dimensional echocardiography (3-DE) for estimation of ventricular volume in very small hearts, left ventricular (LV) volume was determined by 3-DE in the excised hearts of 10 guinea pigs and 10 rabbits, and right ventricular (RV) volume was determined in 20 rabbits. The effect of edge enhancement, Sigma filter, and slice distance (1 mm versus 0.5 mm) was assessed in each heart. True volumes were obtained from ventricular casts. Mean cast volume was 1.38 +/- 0.83 mL for LVs and 1.63 +/- 1.01 mL for RVs. Correlations between 3-DE and true volumes were r > 0.99 (P < 0.0001) for both ventricles. Accuracy was not affected by ventricular type, slice distance, or Sigma filter. Mean percent difference from true volume was significantly less (P = 0.03) with edge enhancement. Ventricular volume can be assessed reliably by 3-DE in very small hearts. The edge enhancement feature improved the accuracy of the measurements.

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Validation of Right Ventricular Volume Measurements by Magnetic Resonance Imaging in Small Hearts Using a Fetal Lamb Model

Cited by 4 publications

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Improved reproducibility of right ventricular volumes and function estimation from cardiac magnetic resonance images using level‐set models

Improved reproducibility of right ventricular volumes and function estimation from cardiac magnetic resonance images using level‐set models

Right ventricular volumes and ejection fraction with fast cine MR imaging in breath-hold technique: Applicability, normal values from 52 volunteers, and evaluation of 325 adult cardiac patients

In Vitro Feasibility and Accuracy of Three‐Dimensional Echocardiography for Ventricular Volume Assessment in Very Small Hearts

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