P. Carson, Xu Li Xu Li, J. Pallister, A. Moskalik, J. Rubin, J. Fowlkes
{"title":"Approximate quantification of detected fractional blood volume and perfusion from 3-D color flow and Doppler power signal imaging","authors":"P. Carson, Xu Li Xu Li, J. Pallister, A. Moskalik, J. Rubin, J. Fowlkes","doi":"10.1109/ULTSYM.1993.339634","DOIUrl":"https://doi.org/10.1109/ULTSYM.1993.339634","url":null,"abstract":"Ultrasound systems have been quite limited in the degree to which they facilitate quantification of reasonably available detected mean tumor flow characteristics such as: detected fractional blood volume, B v; speed-weighted, detected fractional blood volume, Bvv and mean speed of regionally-detected blood flow, v¯. This lack of quantification follows from the relative disinterest in such quantitative imaging as well as the dependence of any backscattered signal levels on intervening tissues and physical barriers to discrimination of the very slow flow and weak scattering amplitude of the dominant (capillary) blood pool relative to the soft tissue motion and scattering level, respectively. However, new signal power imaging modes offer some of the necessary data for measures such as Bv. Some color flow imaging systems also now offer improved clutter cancellers, sharper high pass filters, and other flexibility in adjustments for low speed flow. In addition, intravenous contrast agents will soon become available. Doing the best that is reasonably possible to quantify observed flow characteristics should aid objective assessment of the potential role of color flow and power mode ultrasound in utilizing the high metabolic rate of most breast cancers and metastases. Examples on a benign breast mass are presented","PeriodicalId":127770,"journal":{"name":"1993 Proceedings IEEE Ultrasonics Symposium","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127206922","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}
K. Parker, S. Huang, R. Lerner, F. Lee, D. Rubens, D. Roach
{"title":"Elastic and ultrasonic properties of the prostate","authors":"K. Parker, S. Huang, R. Lerner, F. Lee, D. Rubens, D. Roach","doi":"10.1109/ULTSYM.1993.339631","DOIUrl":"https://doi.org/10.1109/ULTSYM.1993.339631","url":null,"abstract":"Although ultrasound imaging of the prostate continues to attract increasing clinical attention, little has been published on the fundamental ultrasound properties of normal and abnormal prostates. This report provides data on ultrasound properties of whole canine and human prostate specimens, and also the results of measurements of elastic properties of whole organs. The high frequency (ultrasound) properties are germane to B-scan imaging of the prostate, whereas the low frequency (elastic) properties are germane to the perceived “stiffness” of the organ during palpation. The two domains of high frequency (MHz ultrasound imaging) and low frequency (elastic constants) have recently been coupled by a novel technique called \"sonoelasticity imaging\" and understanding of the basic properties is required for successful development of sonoelastic techniques","PeriodicalId":127770,"journal":{"name":"1993 Proceedings IEEE Ultrasonics Symposium","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132837520","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}
J. Andle, J. T. Weaver, J. Vetelino, D. McAllister
{"title":"Application of unidirectional transducers in acoustic plate mode biosensors","authors":"J. Andle, J. T. Weaver, J. Vetelino, D. McAllister","doi":"10.1109/ULTSYM.1993.339473","DOIUrl":"https://doi.org/10.1109/ULTSYM.1993.339473","url":null,"abstract":"One of the most important issues in acoustic plate mode (APM) sensor design has been the excitation of a single acoustic mode within the APM spectrum. In order to acheive this selective excitation without incurring high triple transit distortions, single phase unidirectional transducers (SPUDT) are employed. Thick aluminum electrodes are used to provide strong mechanical reflections and improve the directivity, hence the phase linearity, of the resulting delay line. A dual delay line oscillator (DDLO) sensor measurement system has been evaluated for the selective detection of double-stranded DNA. The observed frequency shifts indicate an essentially linear, reproducible response to chemically denatured DNA samples up to at least 200 ng/mL. The observed fractional frequency change per unit mass (1/f δF/δm) is -6×10-8 ng-1 of DNA in a 1 mL solution.","PeriodicalId":127770,"journal":{"name":"1993 Proceedings IEEE Ultrasonics Symposium","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124312162","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}
T. Nagatsuka, K. Misu, T. Kimura, S. Wadaka, A. Sakai, T. Mizuguchi
{"title":"A narrow transition bandwidth SAW filter using withdrawal weighting with decomposed weighting functions","authors":"T. Nagatsuka, K. Misu, T. Kimura, S. Wadaka, A. Sakai, T. Mizuguchi","doi":"10.1109/ULTSYM.1993.339712","DOIUrl":"https://doi.org/10.1109/ULTSYM.1993.339712","url":null,"abstract":"Thousands of taps with small weights are required for IDTs to achieve narrow transition bandwidths in SAW filters used for satellite applications, In this paper, withdrawal weighting for IDTs is employed to eliminate diffraction problems encountered in overlap weighting. To obtain a good approximation, an original weighting function is decomposed into two functions such that the number of small weights decreases. In the decomposition procedure, the so called zero separation method is applied to the sampled original weighting function, because it is difficult to calculate zeros of thousand order polynomials. The decomposed functions are interpolated, and then approximated by withdrawal weighting. The resultant two weighting functions are applied to input and output IDTs respectively","PeriodicalId":127770,"journal":{"name":"1993 Proceedings IEEE Ultrasonics Symposium","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132491504","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}
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
