Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference最新文献

Control variables and algorithms for in series cardiac assistance 串联心脏辅助的控制变量和算法

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19328

T. Cui, J.K. Li, W. Welkowitz, S. Petrucelli

引用次数: 1

Interferometric measurement of the ocular pulse 眼脉冲的干涉测量

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19361

D. Campagna, A. Drake

引用次数: 7

Rheological properties of large arteries 大动脉的流变特性

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19377

M. Sharma

引用次数: 0

Coherence analysis of EEG via multichannel AR modeling 基于多通道AR建模的脑电相干性分析

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19397

M. Grewal, T. Ning, J. Bronzino

引用次数: 8

Improved accuracy for the frameless stereotaxic operating microscope 提高了无框立体定位操作显微镜的精度

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19340

E. Friets, J. Strohbehn, D. Roberts

{"title":"Improved accuracy for the frameless stereotaxic operating microscope","authors":"E. Friets, J. Strohbehn, D. Roberts","doi":"10.1109/NEBC.1988.19340","DOIUrl":"https://doi.org/10.1109/NEBC.1988.19340","url":null,"abstract":"A frameless stereotaxic operating microscope for neurosurgery is discussed. The microscope projects computed tomography (CT) information into the microscope, superposing a tumor outline or guidance to predetermined targets in the surgical field in the correct scale, position, and orientation. The transposition of data from CT to OR (operating-room) space is accomplished with a set of fiducial points which are localized in both CT and OR space, eliminating the need for conventional mechanical stereotaxic frame attached to the head of the patient. Once this transformation matrix has been determined, the operating microscope's position is monitored and information derived from the CT scan is projected into the operating microscope. A nonimaging ultrasonic rangefinder, consisting of microphones and sound emitters, enables the precise location of the sound emitters in OR space to be determined. Under computer control, one sound emitter is fired, and the distance from it to each of the microphones is determined. The operating microscope has three sound emitters attached to it, so its position and orientation can be uniquely determined. Sound emitters are placed on the fiducial points on the patient's scalp, and the CT-OR transformation is determined. In this way, an open surgical field is maintained, yet stereotaxic information and guidance is available.<<ETX>>","PeriodicalId":165980,"journal":{"name":"Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124248078","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}

引用次数: 1

The dielectric properties of canine and normal and neoplastic splenic tissues 犬和正常及肿瘤脾组织的介电特性

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19357

J. C. Astbury, Michael H. Goldschmidt, Sydney M. Evans, Gert W. Niebauer, Kenneth R. Foster

引用次数: 5

Effect of contrast injection on angiographic measurements 造影剂注射对血管造影测量的影响

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19409

L. Srinivasan, W. Ohley, H. White, R. Peura

{"title":"Effect of contrast injection on angiographic measurements","authors":"L. Srinivasan, W. Ohley, H. White, R. Peura","doi":"10.1109/NEBC.1988.19409","DOIUrl":"https://doi.org/10.1109/NEBC.1988.19409","url":null,"abstract":"Angiographic determinations of blood flow, based on either contrast wavefront velocity or appearance time, are subject to methodological inaccuracy. The inaccuracies due to variable injection flow rates, contrast reflux from a vessel orifice and location of the measurement site were studied in an in vitro model. Contrast boluses of varying volumes and rates were introduced into a nonpulsatile flow stream of normal saline. Variable-size venting needles were also inserted to permit controlled reflux. Transarterial flow was measured with both an electromagnetic flow probe and digital subtraction angiography. Regression equations relating angiographic and electromagnetic flow measurements to underlying steady-state saline, superimposed contrast injectate, and contrast reflux flows were obtained. More accurate angiographic measurements were obtained when the measurement site was moved away from the injection site, since this avoids the turbulent effects of the contrast injection. The results also indicate that for accurate contrast transit flow determinations, the amount of contrast injected and the friction lost in reflux, must be accounted for.<<ETX>>","PeriodicalId":165980,"journal":{"name":"Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124377148","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}

引用次数: 0

Structural analysis of solid ankle-foot orthoses 实心踝足矫形器的结构分析

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19334

D. Leone, S. Diemente, S. Gustave, M. Lopez-Isa

引用次数: 8

Model of incisura on pressure pulse contours in the aorta 切牙对主动脉压力脉冲轮廓的影响模型

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19384

J. Libii, A. Chatterjea

引用次数: 0

Degenerative changes in the lumbar spin and early pes pressures 腰椎旋转和早期足部压力的退行性改变

Proceedings of the 1988 Fourteenth Annual Northeast Bioengineering Conference Pub Date : 1988-03-10 DOI: 10.1109/NEBC.1988.19336

James Krzaczek, G. McNelis, J. Eisenhardt

引用次数: 0