Institute of Fundamental Technological Research
Polish Academy of Sciences

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Jan Sałkowski


Recent publications
1.  Etienne J., Filipczyński L., Firek A., Groniowski J., Kretowicz J., Łypacewicz G., Sałkowski J., Intensity determination of ultrasonic focused beams used in ultrasonography in the case of gravid uterus, ULTRASOUND IN MEDICINE AND BIOLOGY, ISSN: 0301-5629, DOI: 10.1016/0301-5629(76)90020-X, Vol.2, No.2, pp.119-122, 1976

Abstract:
The authors applied two absolute methods for the determination of the intensity of ultrasonic focused beams of 2·5 MHz frequency used in ultrasonograph UG-4 for abdominal visualization: the electrodynamic and the capacitance methods. For the first method a special electrodynamic transducer was constructed which made it possible to measure the acoustic (particle) velocity in the focal point of the ultrasonic beam radiating into water. Hence the focal intensity could be determined.

The two methods gave almost the same intensity values equal to 23 Wcm−2 in peak, (∼ 23 mWcm−2 time average value) although the mean surface value near to the radiating transducer was equal only to 0·59Wcm−2 in peak (∼0·59 MWcm−2 time average value).

Next, the loss of the ultrasonic signal was measured in pregnant women in vivo using for this purpose steel balls as reflecting targets placed in the gravid uterus. The echo amplitudes obtained in the uterus were compared with echoes received from the same steel balls placed in (nonabsorbing) water in the same position relative to the radiating transducer.

In this manner it could be found that intensity levels inside of the uterus were 6–14 dB lower than at the body surface, depending on the anatomical characteristics of the patient.

Thus the maximum (focal) intensities which are to be expected in the gravid uterus in early pregnancy will be between 0·9 and 5·5 Wcm−2 in peak (0·9–5·5 mWcm−2 time average values) when applying the ultrasonograph UG-4.

Affiliations:
Etienne J. - IPPT PAN
Filipczyński L. - IPPT PAN
Firek A. - other affiliation
Groniowski J. - Poznan University of Medical Sciences (PL)
Kretowicz J. - other affiliation
Łypacewicz G. - IPPT PAN
Sałkowski J. - other affiliation
2.  Etienne J., Filipczyński L., Ilmurzyńska K., Sałkowski J., Ultradźwiękowe metody badania czynności serca, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.5, pp.1-19, 1969

Patents
Filing No./Date
Filing Publication
Autors
Title
Protection Area, Applicant Name
Patent Number
Date of Grant
pdf
200708
1977-09-07

1978-07-17
Filipczyński L., Sałkowski J.
Device for recording images from an oscilloscope or cathode ray tube screen, an ultrasonic device for visualizing the human body, especially the moving structures of the heart
PL, Instytut Podstawowych Problemów Techniki PAN
105204

1981-12-30



190082
1976-06-03

1977-04-25
Filipczyński L., Sałkowski J., Szkóp H., Soroka S.
Ultrasound device for visualizing the organs of the human body, especially the heart
PL, Instytut Podstawowych Problemów Techniki PAN
98364

1980-11-29



178844
1975-03-17

1976-03-27
Filipczyński L., Beredziński K., Sałkowski J.
Device for recording the maximum flow velocity of liquids, especially blood
PL, Instytut Podstawowych Problemów Techniki PAN
95112

1978-04-29



178613
1975-03-07

1976-02-28
Filipczyński L., Sałkowski J., Szkóp H.
Ultrasonic method of visualizing the structures of the eye and orbit and an ultrasound scanner for using this method
PL, Instytut Podstawowych Problemów Techniki PAN
96740

1978-06-30



162940
1973-05-30

1975-03-01
Filipczyński L., Waszczuk T., Sałkowski J., Szkóp H.
Ultrasound to visualize the internal structures of the body
PL, Instytut Podstawowych Problemów Techniki PAN
91039

1977-07-30



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