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A digitized, direct contact b‐scanner for ophthalmic application
Author(s) -
Holasek E.,
Sokollu A.,
Purnell E. W.
Publication year - 1973
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.1870010109
Subject(s) - transducer , scanner , computer hardware , signal (programming language) , pulse generator , display device , medicine , generator (circuit theory) , computer science , computer vision , artificial intelligence , acoustics , telecommunications , physics , jitter , programming language , operating system , power (physics) , quantum mechanics
This paper presents the principles of a portable compact instrument utilizing a digital control system and providing B‐scan displays. The instrument is designed exclusively for ophthalmic applications. The system is comprised of a self‐contained scanning head and a signal display unit. The entire unit can easily be rolled to the patient's bedside or into the operating room. A programmed pulse generator provides signals for incremental angular positioning of the transducer as well as signals for the formation of the display. The transducer is moved by a stepping motor to establish the incremental sector scan. Display sweeps are generated by digital‐to‐analog conversion to circumvent the use of mechanically‐driven position sensors as used in conventional systems.