The importance of measurement of effective transducer radiating area in the testing and calibration of “therapeutic” ultrasonic instruments

Fyfe M.C. and Parnell S.M. (1982) The importance of measurement of effective transducer radiating area in the testing and calibration of “therapeutic” ultrasonic instruments. Health Physics, 43 3: 377-381.

Author Fyfe M.C.
Parnell S.M.
Title The importance of measurement of effective transducer radiating area in the testing and calibration of “therapeutic” ultrasonic instruments
Journal name Health Physics   Check publisher's open access policy
ISSN 1538-5159
Publication date 1982
Sub-type Article (original research)
Volume 43
Issue 3
Start page 377
End page 381
Total pages 5
Subject 2307 Health, Toxicology and Mutagenesis
2713 Epidemiology
2741 Radiology Nuclear Medicine and imaging
2300 Environmental Science
2301 Environmental Science (miscellaneous)
2304 Environmental Chemistry
2739 Public Health, Environmental and Occupational Health
3005 Toxicology
3101 Physics and Astronomy (miscellaneous)
Abstract The data presented show early results from a longitudinal survey of therapeutic ultrasonic instrument performance in clinical physiotherapy. Previous studies undertaken in North America and the United Kingdom have shown that these units tend not to be scientifically tested and recalibrated, and have been found to havemeasured outputs at variance with the metered values if tests have been undertaken. This study measured effective transducer radiating area and, concurrently, the total power output at the metered intensity used for the area estimations. Actual output, in terms of total power and space averaged intensity was then compared withexpected values derived both from manufacturers data and from measured transducer radiating area. Only four of eighteen transducers (22) were within the specified tolerances when actual transducer area was taken into account. Range was 1731 of expected values. False assumptions of acceptable and unacceptable output can arise from failure to measure actual transducer radiating area.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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