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IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 20, NO. 6, JUNE 2001 457 LV Volume Quantification via Spatiotemporal
 

Summary: IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 20, NO. 6, JUNE 2001 457
LV Volume Quantification via Spatiotemporal
Analysis of Real-Time 3-D Echocardiography
Elsa D. Angelini, Andrew F. Laine*, Shin Takuma, Jeffrey W. Holmes, and Shunichi Homma
Abstract--This paper presents a method of four-dimensional
(4-D) (3-D + Time) space­frequency analysis for directional
denoising and enhancement of real-time three-dimensional (RT3D)
ultrasound and quantitative measures in diagnostic cardiac ul-
trasound. Expansion of echocardiographic volumes is performed
with complex exponential wavelet-like basis functions called
brushlets. These functions offer good localization in time and
frequency and decompose a signal into distinct patterns of oriented
harmonics, which are invariant to intensity and contrast range.
Deformable-model segmentation is carried out on denoised data
after thresholding of transform coefficients. This process atten-
uates speckle noise while preserving cardiac structure location.
The superiority of 4-D over 3-D analysis for decorrelating additive
white noise and multiplicative speckle noise on a 4-D phantom
volume expanding in time is demonstrated. Quantitative valida-
tion, computed for contours and volumes, is performed on in vitro

  

Source: Angelini, Elsa -Département Traitement du Signal et des Images, Telecom ParisTech

 

Collections: Engineering; Biology and Medicine