Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495759
F. Forsberg, Y.Q. Wu, I. Makin, J. Srinivasan, Wenhua Wang, M. Wheatley
Quantitative characterization of a new ultrasound contrast media ST68 has been performed, ST68 is a sonicated mixture of nonionic surfactants (Span-type and Tween-type), consisting of stabilized microbubbles with a mean diameter of 3.8 /spl mu/m and a concentration of 7.1/spl times/10/sup 8/ bubbles/mL. In vitro a pulsatile flow system was used to acquire digitized RF A-lines. The acoustic properties of ST68, as a function of time, frequency and dose, were calculated. Backscatter changed nonlinearly with dose; maximum was 12.5 dB/spl plusmn/1.0 dB for a 0.4 mL dose. Attenuation reached approximately 22.5 dB/cm for dosages above 0.4 mL. In vivo intravenous injections were given to three rabbits (dosage: 0.01-0.23 mL/kg). A clear increase in flow signal intensity was observed for 1-2 minutes. An in vivo dose response curve was calculated from the audio signals of a 10 MHz cuff transducer placed around the distal aorta. Maximum enhancement was 18.3 dB/spl plusmn/3.13 dB for a 0.13 mL/kg dose. In conclusion, ST68 is capable of producing marked vascular enhancement. Its acoustic properties have been characterized in vitro and in vivo.
{"title":"In vitro and in vivo characterization of a new surfactant stabilized ultrasound contrast media","authors":"F. Forsberg, Y.Q. Wu, I. Makin, J. Srinivasan, Wenhua Wang, M. Wheatley","doi":"10.1109/ULTSYM.1995.495759","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495759","url":null,"abstract":"Quantitative characterization of a new ultrasound contrast media ST68 has been performed, ST68 is a sonicated mixture of nonionic surfactants (Span-type and Tween-type), consisting of stabilized microbubbles with a mean diameter of 3.8 /spl mu/m and a concentration of 7.1/spl times/10/sup 8/ bubbles/mL. In vitro a pulsatile flow system was used to acquire digitized RF A-lines. The acoustic properties of ST68, as a function of time, frequency and dose, were calculated. Backscatter changed nonlinearly with dose; maximum was 12.5 dB/spl plusmn/1.0 dB for a 0.4 mL dose. Attenuation reached approximately 22.5 dB/cm for dosages above 0.4 mL. In vivo intravenous injections were given to three rabbits (dosage: 0.01-0.23 mL/kg). A clear increase in flow signal intensity was observed for 1-2 minutes. An in vivo dose response curve was calculated from the audio signals of a 10 MHz cuff transducer placed around the distal aorta. Maximum enhancement was 18.3 dB/spl plusmn/3.13 dB for a 0.13 mL/kg dose. In conclusion, ST68 is capable of producing marked vascular enhancement. Its acoustic properties have been characterized in vitro and in vivo.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132682765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495569
S. Rooth, A. Rønnekleiv
The design of narrowband SAW filters involves the calculation of SAW propagation in transducers which are long compared to the square of their apertures in wavelengths. To increase design accuracy, it is of high importance to model diffraction effects in these transducer structures. We present a method for calculating diffraction of both forward and backward propagating SAWs, which are coupled. Hence, both SPUDT filters and inline resonator filters can be described by diffraction. The simulation of diffraction is performed by dividing the transducers into tracks (across the transducers' aperture) as for the analysis of apodized weighted transducers. By allowing for a direct acoustic coupling between the tracks, we simulate diffraction by a coupling theory. This theory is capable of describing the transducers by a uniform surface condition diffraction theory or as waveguides.
{"title":"The application of pseudoinverse matrices for diffraction calculation of SAW propagation in transducers","authors":"S. Rooth, A. Rønnekleiv","doi":"10.1109/ULTSYM.1995.495569","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495569","url":null,"abstract":"The design of narrowband SAW filters involves the calculation of SAW propagation in transducers which are long compared to the square of their apertures in wavelengths. To increase design accuracy, it is of high importance to model diffraction effects in these transducer structures. We present a method for calculating diffraction of both forward and backward propagating SAWs, which are coupled. Hence, both SPUDT filters and inline resonator filters can be described by diffraction. The simulation of diffraction is performed by dividing the transducers into tracks (across the transducers' aperture) as for the analysis of apodized weighted transducers. By allowing for a direct acoustic coupling between the tracks, we simulate diffraction by a coupling theory. This theory is capable of describing the transducers by a uniform surface condition diffraction theory or as waveguides.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133125847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495624
V. Anisimkin, M. Penza, S. A. Maksimov, L. Vasanelli
Uncoated SAW delay lines performing as thermal probes are applied for detection of gases and gas flows. Analysis of the forced convection is performed for 13 analytes in linear approximation by neglecting their chemical interaction with the ambient. Experimental detection is performed for H/sub 2/, He, Ar, CH/sub 4/, NH/sub 3/, N/sub 2/, O/sub 2/, dry air, using SAW delay lines on SiO/sub 2/, LiNbO/sub 3/, Bi/sub 12/GeO/sub 20/, Bi/sub 12/SiO/sub 20/, at operating temperatures T=25-165/spl deg/C and frequencies f=21-263 MHz. SAW responses are measured as a function of concentration n, flow rate u, temperature coefficient of velocity (TCV) and temperature T. Efficient selectivity and monitoring of the responses are demonstrated by a proper selection of TCV and T. Detection of 0.35% CH/sub 4/, 0.25% H/sub 2/ and 0.1% NH/sub 3/ in N/sub 2/ is performed. Linear output for u=50-2000 ml/min is obtained.
{"title":"SAW delay lines for thermal detection of gases and gas flows","authors":"V. Anisimkin, M. Penza, S. A. Maksimov, L. Vasanelli","doi":"10.1109/ULTSYM.1995.495624","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495624","url":null,"abstract":"Uncoated SAW delay lines performing as thermal probes are applied for detection of gases and gas flows. Analysis of the forced convection is performed for 13 analytes in linear approximation by neglecting their chemical interaction with the ambient. Experimental detection is performed for H/sub 2/, He, Ar, CH/sub 4/, NH/sub 3/, N/sub 2/, O/sub 2/, dry air, using SAW delay lines on SiO/sub 2/, LiNbO/sub 3/, Bi/sub 12/GeO/sub 20/, Bi/sub 12/SiO/sub 20/, at operating temperatures T=25-165/spl deg/C and frequencies f=21-263 MHz. SAW responses are measured as a function of concentration n, flow rate u, temperature coefficient of velocity (TCV) and temperature T. Efficient selectivity and monitoring of the responses are demonstrated by a proper selection of TCV and T. Detection of 0.35% CH/sub 4/, 0.25% H/sub 2/ and 0.1% NH/sub 3/ in N/sub 2/ is performed. Linear output for u=50-2000 ml/min is obtained.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134409225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495708
D. Cathignol, O. Sapozhnikov, J. Zhang, J. Chapelon
The present report compares acoustical fields radiated in water from two focused transducers of the same geometrical parameters (aperture diameter 100 mm, focal length 100 mm, resonance frequency 1 MHz), but made of different materials (PZT piezoceramic and piezocomposite). Both continuous wave and pulsed regimes of transducer excitation were used. A discrepancy between the O'Neil theory (1949) and experiment was noticed, which was essential in the case of the PZT radiator and of little importance for the piezocomposite source. It is shown that this disagreement is accounted for by Lamb waves propagating in the piezoceramic transducer material. O'Neil theory is not applicable to describe the pressure field, as long as the effect of Lamb waves is not taken into account for PZT transducers. On the contrary, O'Neil theory is able to describe approximately the pressure field of highly focused piezocomposite transducers.
{"title":"Comparison of acoustical fields radiated from PZT piezoceramic and piezocomposite highly focused transducers","authors":"D. Cathignol, O. Sapozhnikov, J. Zhang, J. Chapelon","doi":"10.1109/ULTSYM.1995.495708","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495708","url":null,"abstract":"The present report compares acoustical fields radiated in water from two focused transducers of the same geometrical parameters (aperture diameter 100 mm, focal length 100 mm, resonance frequency 1 MHz), but made of different materials (PZT piezoceramic and piezocomposite). Both continuous wave and pulsed regimes of transducer excitation were used. A discrepancy between the O'Neil theory (1949) and experiment was noticed, which was essential in the case of the PZT radiator and of little importance for the piezocomposite source. It is shown that this disagreement is accounted for by Lamb waves propagating in the piezoceramic transducer material. O'Neil theory is not applicable to describe the pressure field, as long as the effect of Lamb waves is not taken into account for PZT transducers. On the contrary, O'Neil theory is able to describe approximately the pressure field of highly focused piezocomposite transducers.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134640067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495600
A. Hachigo, D. Malocha, S. M. Richie
The surface acoustic wave (SAW) filter properties of ZnO/diamond/Si structure are calculated including velocity dispersion. It is well known that the pole width of a SAW filter response and the number of electrodes have a reciprocal relation for bulk piezoelectric materials. However, the pole width of layered structures tends to be narrower than that of expected bulk SAW devices and the reason is due to the velocity dispersion of layered structures. The pole width of layered structures was calculated by the delta function model including the velocity dispersion and was compared with the experimental results. The dispersion effect is also calculated by using the Smith's equivalent circuit model. The results of this analysis are presented and agree well with the experimental results.
{"title":"ZnO/diamond/Si SAW filter properties including velocity dispersion","authors":"A. Hachigo, D. Malocha, S. M. Richie","doi":"10.1109/ULTSYM.1995.495600","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495600","url":null,"abstract":"The surface acoustic wave (SAW) filter properties of ZnO/diamond/Si structure are calculated including velocity dispersion. It is well known that the pole width of a SAW filter response and the number of electrodes have a reciprocal relation for bulk piezoelectric materials. However, the pole width of layered structures tends to be narrower than that of expected bulk SAW devices and the reason is due to the velocity dispersion of layered structures. The pole width of layered structures was calculated by the delta function model including the velocity dispersion and was compared with the experimental results. The dispersion effect is also calculated by using the Smith's equivalent circuit model. The results of this analysis are presented and agree well with the experimental results.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133092432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495673
R. K. Ing, M. Fink
The time reversal process is used to detect surface and sub-surface flaws and leads to a self focusing process of Rayleigh waves. The surface waves are generated with an array of linear transducers coupled to a specimen surface with a Plexiglas wedge. The advantages of such a technique are demonstrated with the detection of surface and sub-surface holes of subwavelength dimensions. In a pulse-echo measurement, the signal to noise ratio is exponentially increased when the self focusing repetitive process is used Measurements are calibrated with an optical interferometer and results are compared with a surface focusing model to point out the sensitivity of such a detection method.
{"title":"Surface and sub-surface flaws detection using Rayleigh wave time reversal mirrors","authors":"R. K. Ing, M. Fink","doi":"10.1109/ULTSYM.1995.495673","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495673","url":null,"abstract":"The time reversal process is used to detect surface and sub-surface flaws and leads to a self focusing process of Rayleigh waves. The surface waves are generated with an array of linear transducers coupled to a specimen surface with a Plexiglas wedge. The advantages of such a technique are demonstrated with the detection of surface and sub-surface holes of subwavelength dimensions. In a pulse-echo measurement, the signal to noise ratio is exponentially increased when the self focusing repetitive process is used Measurements are calibrated with an optical interferometer and results are compared with a surface focusing model to point out the sensitivity of such a detection method.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114157630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495657
E. Balashova, V. Lemanov, R. Kunze, G. Martin, M. Weihnacht
Results on the ultrasonic study of SrTiO/sub 3/ in the temperature range from 20 to 120 K using an electrostrictive interdigital transducer for longitudinal waves and piezoelectric transducer for shear waves are presented. A thermally activated relaxation loss mechanism due to strain-induced domain wall motion has been observed in the tetragonal phase of SrTiO/sub 3/. Below 40 K the anomalies in velocity and attenuation indicating the possible onset of Muller state have been found for both longitudinal and shear waves. The decrease of velocity has been connected with anomalous temperature behavior of elastic constant c/sub 44/, and peaks of attenuation could be explained by fluctuations.
{"title":"Some new results on the ultrasonic behavior of SrTiO/sub 3/ in the quantum paraelectric region","authors":"E. Balashova, V. Lemanov, R. Kunze, G. Martin, M. Weihnacht","doi":"10.1109/ULTSYM.1995.495657","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495657","url":null,"abstract":"Results on the ultrasonic study of SrTiO/sub 3/ in the temperature range from 20 to 120 K using an electrostrictive interdigital transducer for longitudinal waves and piezoelectric transducer for shear waves are presented. A thermally activated relaxation loss mechanism due to strain-induced domain wall motion has been observed in the tetragonal phase of SrTiO/sub 3/. Below 40 K the anomalies in velocity and attenuation indicating the possible onset of Muller state have been found for both longitudinal and shear waves. The decrease of velocity has been connected with anomalous temperature behavior of elastic constant c/sub 44/, and peaks of attenuation could be explained by fluctuations.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114298122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495565
J. Kosinski, J. T. Stewart, J. Gualtieri, J. Himmel, R. McGowan, D. Huynh, A. Ballato, R. Filler
The acceleration-induced frequency shifts for distinct transverse modes of surface acoustic wave (SAW) resonators have been calculated and experimentally validated using a 98.5 MHz SAW resonator. The calculations were made using a recently developed finite element approach to develop numerical solutions for the static biasing state. The SAW mode shapes were determined by applying the variational formulation of Sinha and Tiersten. The calculated mode shapes were compared to actual resonator transverse mode shapes imaged using acousto-optic diffraction with a beam-expanded helium-neon (HeNe) laser to visualize the acoustic power flow. The static biasing state solutions were combined with the calculated mode shapes to compute theoretical acceleration-induced frequency shifts using the perturbation integral formulation derived by Tiersten. For the experimental confirmation, the 98.5 MHz SAW resonator was mounted in a voltage controlled oscillator (VCO) and submitted to acceleration sensitivity tests at frequencies corresponding to those resonator transverse modes previously imaged. The theoretical and experimental frequency shifts both indicate that the acceleration sensitivity of SAW resonators does not strongly depend on the transverse mode shape.
{"title":"The influence of mode shape on the acceleration sensitivity of SAW resonators","authors":"J. Kosinski, J. T. Stewart, J. Gualtieri, J. Himmel, R. McGowan, D. Huynh, A. Ballato, R. Filler","doi":"10.1109/ULTSYM.1995.495565","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495565","url":null,"abstract":"The acceleration-induced frequency shifts for distinct transverse modes of surface acoustic wave (SAW) resonators have been calculated and experimentally validated using a 98.5 MHz SAW resonator. The calculations were made using a recently developed finite element approach to develop numerical solutions for the static biasing state. The SAW mode shapes were determined by applying the variational formulation of Sinha and Tiersten. The calculated mode shapes were compared to actual resonator transverse mode shapes imaged using acousto-optic diffraction with a beam-expanded helium-neon (HeNe) laser to visualize the acoustic power flow. The static biasing state solutions were combined with the calculated mode shapes to compute theoretical acceleration-induced frequency shifts using the perturbation integral formulation derived by Tiersten. For the experimental confirmation, the 98.5 MHz SAW resonator was mounted in a voltage controlled oscillator (VCO) and submitted to acceleration sensitivity tests at frequencies corresponding to those resonator transverse modes previously imaged. The theoretical and experimental frequency shifts both indicate that the acceleration sensitivity of SAW resonators does not strongly depend on the transverse mode shape.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123167474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495623
M. Rapp, N. Bari, S. Stier, H. Ache
Starting from a recently developed automatic working, compact analytical microsystem for organic gas detection which uses modified commercially available SAW devices, a new approach is presented to improve its sensitivity and selectivity. The choice of low-loss SAW devices using horizontally polarized surface transverse waves instead of Rayleigh-type waves allows an increased thickness of sensitive coatings resulting in a higher sensitivity and larger freedom of choice towards the sensitive material deposited. An example for taking advantage of this freedom is the choice of polysiloxanes which show very good sensitivities and ageing properties. In addition, their selectivity could be easily controlled by choosing appropriate side groups.
{"title":"Optimization of an analytical SAW microsystem for organic gas detection","authors":"M. Rapp, N. Bari, S. Stier, H. Ache","doi":"10.1109/ULTSYM.1995.495623","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495623","url":null,"abstract":"Starting from a recently developed automatic working, compact analytical microsystem for organic gas detection which uses modified commercially available SAW devices, a new approach is presented to improve its sensitivity and selectivity. The choice of low-loss SAW devices using horizontally polarized surface transverse waves instead of Rayleigh-type waves allows an increased thickness of sensitive coatings resulting in a higher sensitivity and larger freedom of choice towards the sensitive material deposited. An example for taking advantage of this freedom is the choice of polysiloxanes which show very good sensitivities and ageing properties. In addition, their selectivity could be easily controlled by choosing appropriate side groups.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"291 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123174160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1995-11-07DOI: 10.1109/ULTSYM.1995.495822
H. Hashimoto, Y. Shen, Y. Takeuchi, E. Yoshitome
A new ultrasound three dimensional (3D) reconstruction method is presented. It can show blood flow geometry (one promising application of 3D techniques). For this purpose, the authors adopt power Doppler ultrasound images of vascular flow because power Doppler has slow speed detectability and much less angle dependence. Here, the authors introduce this 3D processing method for ultrasonic diagnostic images. Furthermore, they propose an endoscopic view image. This power Doppler based endoscopic view image can display interior views of flow in arterial branches, curved vessels and so on.
{"title":"Ultrasound 3-dimensional image processing using power Doppler image","authors":"H. Hashimoto, Y. Shen, Y. Takeuchi, E. Yoshitome","doi":"10.1109/ULTSYM.1995.495822","DOIUrl":"https://doi.org/10.1109/ULTSYM.1995.495822","url":null,"abstract":"A new ultrasound three dimensional (3D) reconstruction method is presented. It can show blood flow geometry (one promising application of 3D techniques). For this purpose, the authors adopt power Doppler ultrasound images of vascular flow because power Doppler has slow speed detectability and much less angle dependence. Here, the authors introduce this 3D processing method for ultrasonic diagnostic images. Furthermore, they propose an endoscopic view image. This power Doppler based endoscopic view image can display interior views of flow in arterial branches, curved vessels and so on.","PeriodicalId":268177,"journal":{"name":"1995 IEEE Ultrasonics Symposium. Proceedings. An International Symposium","volume":"61 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123299355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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