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Ultrasound Densitometric Analysis
Author(s) -
FERNANDEZ ANTHONY P.,
ARONSON SOLOMON,
TOLEDANO ALICIA,
WINKELMANN JACQUELINE,
SALDIVAR JOSE,
FEINSTEIN STEVEN B.
Publication year - 1996
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/j.1540-8175.1996.tb00925.x
Subject(s) - densitometry , ultrasound , transducer , imaging phantom , phase (matter) , biomedical engineering , materials science , ultrasonic sensor , microbubbles , nuclear medicine , acoustics , optics , medicine , physics , quantum mechanics
Videodensitometric analysis of myocardial contrast echocardiography is traditionally performed off line. Recently, an online contrast ultrasound analysis system, Acoustic Densitometry (Hewlett‐Packard), was introduced. We compared pixel intensities acquired with Acoustic Densitometry to pixel intensities derived from videodensitometry. A tissue phantom was imaged in phase I using three transducer frequencies (2.5, 3.5, and 5.0 MHz). In phase II, an in vitro flowing tube model with various concentrations of Albunex® was imaged at two flow rates, 0.6 and 1.2 m/sec, and at two transducer frequencies, 2.5 and 3.5 MHz. The relationship between pixel intensities yielded by the two systems for identical ultrasound signals was determined with linear regression. Intensities derived with Acoustic Densitometry strongly correlated with those derived from the offline videodensitometry system. The intensities were related by a predictive multiplicative factor based on display characteristics of the two systems. These results suggest that semiquantitative, online perfusion analysis with Acoustic Densitometry is as sensitive as analysis offline with videodensitometry.