Accuracy of 3-dimensional color Doppler-derived flow volumes with increasing image depth

James Pemberton, Ling Hui, Monica Young, Xiaokui Li, Antoinette Kenny, David Sahn

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Objectives. We and others have reported on the use of digital color Doppler sonography from real-time 3-dimensional (3D) echocardiography and its use in accurately calculating cardiac flow volumes, namely stroke volume (SV) and, hence, cardiac output. However, in some patients, image depth is higher than average, and this may affect the accuracy of volume calculation. We sought to investigate the impact of image depth and the accompanying change in signal strength, spatial resolution, and pulse repetition frequency on the accuracy of SV calculation from 3D color Doppler data in an in vitro model. Methods. A tube model of the left ventricular outflow tract was constructed from plastic tubing and connected to a pulsatile pump. The volume flowing through the tube was imaged using a 3D echocardiography system. Stroke volumes from the pump were computed from the DICOM data using commercially available software and compared with a reference standard of timed volumes with the use of a graduated measuring cylinder over a range of depth settings and SVs. Results. There was good correlation between the 3D-derived SVs and the reference cylinder measures over all depths from 4 to 16 cm at 1-cm increments with a tube diameter of 17 mm, a pump rate of 60 beats/min, and SVs ranging from 20 to 70 mL. The average r 2 value for the 13 different depths was 0.976. However, the accuracy of the 3D method of volume calculation appeared to fall at depths greater than 13 cm, especially at higher SVs. Conclusions. Stroke volume calculation from real-time 3D color Doppler data in this in vitro study shows that at depths greater than approximately 13 cm, accuracy decreases, especially at higher SVs. This may be due to decreased resolution and the reduced frame rate at these depths. At shallower depths, volume calculation form the 3D Doppler data appears very accurate.

Original languageEnglish (US)
Pages (from-to)1109-1115
Number of pages7
JournalJournal of Ultrasound in Medicine
Volume24
Issue number8
StatePublished - Aug 2005

Fingerprint

Stroke Volume
Color
stroke volume
color
Echocardiography
Doppler Color Ultrasonography
Cardiac Volume
echocardiography
Cardiac Output
pumps
tubes
Plastics
Pulse
Software
cardiac output
synchronism
repetition
plastics
spatial resolution
computer programs

Keywords

  • 3-dimensional
  • Doppler sonography
  • Echocardiography

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Acoustics and Ultrasonics

Cite this

Pemberton, J., Hui, L., Young, M., Li, X., Kenny, A., & Sahn, D. (2005). Accuracy of 3-dimensional color Doppler-derived flow volumes with increasing image depth. Journal of Ultrasound in Medicine, 24(8), 1109-1115.

Accuracy of 3-dimensional color Doppler-derived flow volumes with increasing image depth. / Pemberton, James; Hui, Ling; Young, Monica; Li, Xiaokui; Kenny, Antoinette; Sahn, David.

In: Journal of Ultrasound in Medicine, Vol. 24, No. 8, 08.2005, p. 1109-1115.

Research output: Contribution to journalArticle

Pemberton, J, Hui, L, Young, M, Li, X, Kenny, A & Sahn, D 2005, 'Accuracy of 3-dimensional color Doppler-derived flow volumes with increasing image depth', Journal of Ultrasound in Medicine, vol. 24, no. 8, pp. 1109-1115.
Pemberton J, Hui L, Young M, Li X, Kenny A, Sahn D. Accuracy of 3-dimensional color Doppler-derived flow volumes with increasing image depth. Journal of Ultrasound in Medicine. 2005 Aug;24(8):1109-1115.
Pemberton, James ; Hui, Ling ; Young, Monica ; Li, Xiaokui ; Kenny, Antoinette ; Sahn, David. / Accuracy of 3-dimensional color Doppler-derived flow volumes with increasing image depth. In: Journal of Ultrasound in Medicine. 2005 ; Vol. 24, No. 8. pp. 1109-1115.
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abstract = "Objectives. We and others have reported on the use of digital color Doppler sonography from real-time 3-dimensional (3D) echocardiography and its use in accurately calculating cardiac flow volumes, namely stroke volume (SV) and, hence, cardiac output. However, in some patients, image depth is higher than average, and this may affect the accuracy of volume calculation. We sought to investigate the impact of image depth and the accompanying change in signal strength, spatial resolution, and pulse repetition frequency on the accuracy of SV calculation from 3D color Doppler data in an in vitro model. Methods. A tube model of the left ventricular outflow tract was constructed from plastic tubing and connected to a pulsatile pump. The volume flowing through the tube was imaged using a 3D echocardiography system. Stroke volumes from the pump were computed from the DICOM data using commercially available software and compared with a reference standard of timed volumes with the use of a graduated measuring cylinder over a range of depth settings and SVs. Results. There was good correlation between the 3D-derived SVs and the reference cylinder measures over all depths from 4 to 16 cm at 1-cm increments with a tube diameter of 17 mm, a pump rate of 60 beats/min, and SVs ranging from 20 to 70 mL. The average r 2 value for the 13 different depths was 0.976. However, the accuracy of the 3D method of volume calculation appeared to fall at depths greater than 13 cm, especially at higher SVs. Conclusions. Stroke volume calculation from real-time 3D color Doppler data in this in vitro study shows that at depths greater than approximately 13 cm, accuracy decreases, especially at higher SVs. This may be due to decreased resolution and the reduced frame rate at these depths. At shallower depths, volume calculation form the 3D Doppler data appears very accurate.",
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