摘要:

Laser systems permit very high energy radiation of a single wavelength to be focused on a tiny spot, and have found application in many areas of engineering. They are also currently used in many branches of medicine. The fields reviewed here are ophthalmology, gvnaecology, dermatology, otolaryngology, gastroenterology and physiotherapy. Lasers which are in wide use for medical applications include argon, YAG and carbon dioxide opes. In many areas, lasers have been found to be more effective than conventional treatment methods with advantages including less blood loss, more accurate removal of unwanted tissue, shorter operating time and less postoperative pain. It is expected that the next decade will see the laser as an everyday tool in many more medical applications.

ISSN:0309-1902    

DOI:10.3109/03091909309008351

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

A 20 MHz: pulsed Doppler ultrasound system was used to obtain steady flow velocity profiles in cylindrical lubes. A deconvolution technique was emplyed to improue the spatial resolution and the corrected results were compared with Poiseuille's theory. Frequency domain windowing was used to suppress noise in the deconvolution procedure, using a method which reduced distortions at the window boundaries. Wall shear rate was calculated from the measured velocity profiles both before and after deconvolution, and compared with theory to quantify the accuracy of the technique. The results illustrate the significant improvement provided by deconvolution, with the average error in measured wall shear rate reducing from 16 to 12% after applying the technique. Some of the discrepancy is in part attributed to the method used to determine wall shear rate.

ISSN:0309-1902    

DOI:10.3109/03091909309008352

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

We describe how ciliary beat frequency (CBF) of human respiratory epitheliumin vitrocan be robustly and quickly measured. The proven photometric technique has been improved by using a microcomputer to calculate and display the results. The software, which runs on an IBM-compatible PC, was developed using Borland Turbo Pascal and employs a fast Fourier transform routine to derive the CBF. Results are displayed almost as soon as a cell is identified under the microscope, and are in accordance with previous work. The technique can now be used diagnostically and for a variety of drug trials on respiratory epithelium.

ISSN:0309-1902    

DOI:10.3109/03091909309008353

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909309008354

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909309008355

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

摘要:

Nuclear Cardiology and Cardiac Magnetic ResonanceBy Ernst E. van der Wall. 1992, E67-00, DF1 195.00. Kluwer, Dordrecht, ISBN 0 7923 1780 7.Cardiovascular BiomaterialsEdited by Garth W. Hastings. 1992, DM190, pp. 198. Springer-Verlag, London, ISBN 3 540 19666 8.Laser Surgery in Ophthalmology—Practical ApplicationsEdited by T. A. Weingeist and S. R. Sneed. 1992, US$110.40, pp. 222. Appleton and Lange, USA, ISBN 0 8385 7903 5.Ambulatory Blood Pressure RecordingEdited by H. R. Brunner and B. Waeber. 1992, US $ 69.00, pp. 206. Raven Press, New York, ISBN 0 88167 889 90.

ISSN:0309-1902    

DOI:10.3109/03091909309008356

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909309008357

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909309008358

出版商:Taylor&Francis    

年代:1993

数据来源: Taylor