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Acoustic intensity histogram pattern diagnosis of liver diseases
Author(s) -
Itoh Kouichi,
Yasuda Yoshikazu,
Aihara Toshinori,
Koyano Akira,
Konishi Tatuo
Publication year - 1985
Publication title -
journal of clinical ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.272
H-Index - 61
eISSN - 1097-0096
pISSN - 0091-2751
DOI - 10.1002/jcu.1870130703
Subject(s) - histogram , medicine , echo (communications protocol) , intensity (physics) , attenuation , cirrhosis , region of interest , nuclear medicine , radiology , physics , artificial intelligence , image (mathematics) , optics , computer science , computer network
Display information on the histogram pattern includes echo intensity and echo frequency in the region of interest (ROI). The level and frequency of the center of gravity and the width of the echo level at 0%, 10%, and 50% of normalized frequency are calculated from the histogram. The width of the echo from the liver is significantly elongated on the X axis ( P < 0.001) but that of the center of gravity is not. Fatty liver shows the same attenuation rate curve as normal liver, although echo intensity is greatly increased. The curve of the attenuation rate derived from the histogram can be used to distinguish between liver cirrhosis and the tissue of normal or fatty liver. This study clearly demonstrates the clinical usefulness of the histogram as a diagnostic tool.