Partner: P. Karłowicz


Recent publications
1.Lewandowski M., Walczak M., Karwat P., Witek B., Karłowicz P., Research and Medical Transcranial Doppler System, ARCHIVES OF ACOUSTICS, ISSN: 0137-5075, DOI: 10.1515/aoa-2016-0074, Vol.41, No.4, pp.773-781, 2016
Abstract:

A new ultrasound digital transcranial Doppler system (digiTDS) is introduced. The digiTDS enables diagnosis of intracranial vessels which are rather difficult to penetrate for standard systems. The device can display a color map of flow velocities (in time-depth domain) and a spectrogram of a Doppler signal obtained at particular depth. The system offers a multigate processing which allows to display a number of spectrograms simultaneously and to reconstruct a flow velocity profile.
The digital signal processing in digiTDS is partitioned between hardware and software parts. The hardware part (based on FPGA) executes a signal demodulation and reduces data stream. The software part (PC) performs the Doppler processing and display tasks. The hardware-software partitioning allowed to build a flexible Doppler platform at a relatively low cost.
The digiTDS design fulfills all necessary medical standards being a new useful tool in the transcranial field as well as in heart velocimetry research.

Keywords:

Doppler system, digital signal processing, hardware-software partitioning, field programmable gate arrays

Affiliations:
Lewandowski M.-IPPT PAN
Walczak M.-IPPT PAN
Karwat P.-IPPT PAN
Witek B.-IPPT PAN
Karłowicz P.-other affiliation
2.Gawlikowski M., Lewandowski M., Nowicki A., Kustosz R., Walczak M., Karwat P., Karłowicz P., The Application of Ultrasonic Methods to Flow Measurement and Detection of Microembolus in Heart Prostheses, ACTA PHYSICA POLONICA A, ISSN: 0587-4246, DOI: 10.12693/APhysPolA.124.417, Vol.124, No.3, pp.417-420, 2013
Abstract:

For the last 20 years the world cardiosurgery has presented a considerable change of attitude to mechanical circulatory support. In spite of technological progress the main problems in ventricular assist devices are: thrombosis and low accuracy of flow measurements. In this paper the prototype of multi-gate Doppler flowmeter intended for cardiac assist system ReligaHeart EXT has been presented as well as the possibility of ultrasonic micro embolus detection.

Keywords:

artificial heart, microemboli, ultrasound Doppler

Affiliations:
Gawlikowski M.-other affiliation
Lewandowski M.-IPPT PAN
Nowicki A.-IPPT PAN
Kustosz R.-other affiliation
Walczak M.-IPPT PAN
Karwat P.-IPPT PAN
Karłowicz P.-other affiliation

List of chapters in recent monographs
1.
328
Lewandowski M., Walczak M., Karwat P., Nowicki A., Karłowicz P., Polskie protezy serca, opracowanie konstrukcji, badania kwalifikacyjne, przedkliniczne i kliniczne., rozdział: Wykonanie modelu i implementacja oprogramowania do ultradźwiękowego pomiaru przepływu krwi, FRK, Zabrze. Praca zbiorowa pod redakcją: Kustosz R., Gonsior M., Jarosz A., pp.3-21, 2013

Conference abstracts
1.Lewandowski M., Walczak M., Karwat P., Witek B., Nowicki A., Karłowicz P., Research & Medical Doppler platform, 11th Congrès Français d'Acoustique, 2012 IOA annual meeting, 2012-04-23/04-27, Nantes (FR), pp.x1-x6, 2012
Abstract:

A new ultrasound digital transcranial Doppler system (digiTDS) is introduced. The digiTDS enables diagnosis of intracranial vessels which are difficult to penetrate for standard systems. The device can display a color map of flow velocities in time-depth domain and a spectrogram of a Doppler signal received from a particular depth. The system offers a multigate processing that allows to display simultaneously a number of spectrograms and to reconstruct a flow velocity profile. The digital signal processing in digiTDS is partitioned between hardware and software parts. The hardware part (based on FPGA) executes a signal demodulation and reduces data stream. The software part (PC) performs the Doppler processing and display tasks. The hardware-software partitioning allowed to build a flexible Doppler platform at a relatively low cost. The digiTDS design fulfills all necessary medical standards being a new useful tool in transcranial field as well as in heart velocimetry research.

Keywords:

ultrasound transcranial Doppler, RF signal processing, DSP, FPGA

Affiliations:
Lewandowski M.-IPPT PAN
Walczak M.-IPPT PAN
Karwat P.-IPPT PAN
Witek B.-IPPT PAN
Nowicki A.-IPPT PAN
Karłowicz P.-other affiliation

Patents
Numer/data zgłoszenia patentowego
Ogłoszenie o zgłoszeniu patentowym
Twórca / twórcy
Tytuł
Kraj i Nazwa uprawnionego z patentu
Numer patentu
Ogłoszenie o udzieleniu patentu
pdf
277279
1989-01-20
BUP 15/90
1990-07-23 BUP 15/90
Marciniak A., Nowicki A., Secomski W., Karłowicz P., Piechocki M., Liwski J.
Ultradźwiękowa głowica sektorowa
PL, Instytut Podstawowych Problemów Techniki PAN
157977
WUP 07/92
1992-07-31
255681
1985-10-08
-
1990-07-31
Karłowicz P., Liwski J., Nowicki A.
Sposób określania kierunku przepływu w cyfrowym pomiarze prędkości przepływu z zastosowaniem impulsowego przepływomierza dopplerowskiego
PL, Instytut Podstawowych Problemów Techniki PAN
149954
-
1987-05-18
247801
1984-05-23
-
1989-04-29
Karłowicz P., Nowicki A., Piechocki M., Secomski W.
Ultradźwiękowy przepływomierz dopplerowski do rejestracji maksymalnej prędkości cieczy
PL, Instytut Podstawowych Problemów Techniki PAN
144601
-
1985-12-03
239097
1982-11-18
-
1986-11-15
Filipczyński L., Karłowicz P., Nowicki A.
Sposób i urządzenie do rozpoznania zaburzenia przepływu cieczy, zwłaszcza krwi
PL, Instytut Podstawowych Problemów Techniki PAN
136932
-
1984-12-03