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Is the quality of transvaginal images superior to transabdominal ones under matched conditions?
Author(s) -
Kossoff G.,
Griffiths K. A.,
Dixon C. E.
Publication year - 1991
Publication title -
ultrasound in obstetrics and gynecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.202
H-Index - 141
eISSN - 1469-0705
pISSN - 0960-7692
DOI - 10.1046/j.1469-0705.1991.01010029.x
Subject(s) - medicine , image quality , quality (philosophy) , reflection (computer programming) , transducer , transvaginal ultrasound , radiology , ultrasonic sensor , significant difference , nuclear medicine , biomedical engineering , image (mathematics) , acoustics , ultrasound , artificial intelligence , computer science , philosophy , physics , epistemology , programming language
Transvaginal images, under matched conditions, are in general superior in quality to transabdominal sonograms. The difference is, however, not dramatic and instances frequently occur when the same quality and even inferior images are obtained on transvaginal examinations. The dominant factor is the amount of overlying tissues. For the same thickness, subcutaneous tissues have greater degrading characteristics. Subcutaneous tissues also mar the quality of images by giving rise to strong multiple reflection artifacts. The major factors for image degradation are associated with a moderate increase in the width of the ultrasonic beam and a large increase in the side lobes. The dramatic superiority of transvaginal imaging described in previous comparison studies is due principally to the use of higher frequencies, more strongly focused beams and closer positioning of tissues to the transducer. Copyright © 1991 International Society of Ultrasound in Obstetrics and Gynecology