Premium
Method for determining the SATA and SAPA intensities for real‐time ultrasonographic scanning modes
Author(s) -
Macdonald M C,
Madsen E L
Publication year - 1992
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.1992.11.1.11
Subject(s) - oscilloscope , scanner , medicine , pulse (music) , ultrasound , biomedical engineering , nuclear medicine , optics , radiology , physics , detector
Determination of a complete set of sonographic exposure parameters is desirable for any clinical ultrasound unit and is particularly important in controlled studies of biologic effects. When the exposure system is a diagnostic real‐time scanner operating in autoscan mode, the determination of two of these parameters, the spatial average‐temporal average (SATA) and the spatial average‐pulse average (SAPA) intensities, is not straightforward because of the spatial overlap of successive propagating pulses. A method is described for determining these intensities for autoscan operation. The primary tool in the method is a digital oscilloscope, which supports pretrigger recording and configuring of the oscilloscope's memory into segments that can record rapidly occurring successive pulses, each segment recording one pulse. Results for a few commercially available real‐time scanning systems are presented.