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A removable ultrasonic collimator for improving resolution
Author(s) -
Yeh EnLin
Publication year - 1975
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.1870030112
Subject(s) - collimator , ultrasonic sensor , transducer , optics , ultrasound , lens (geology) , acoustics , beam (structure) , physics
A removable ultrasonic collimator is described. It could be easily attached to a general purpose transducer to improve resolution on ultrasound study of superficial small organs. The collimator is made of a small central focusing lens, 6 mm in diameter, surrounded air. The air insulates the peripheral portion of the transducer surface. Only the central ultrasonic beam would be transmitted through the lens. As a result, the ultrasonic beam is narrowed and the resolution is improved. Draw‐back of the collimator is a reduction in the ultrasound intensity. However, it can be compensated for increasing either the transducer output or system gain.