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Medical Scanning and Imaging Techniques of Value in Non-Destructive Testing, IEE Colloquium on

Date 3 Nov 1989

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  • The development of 3D X-ray micro-tomography with sub 100 micron resolution for medical, industrial and biological applications

    Publication Year: 1989 , Page(s): 7/1 - 7/6
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (360 KB)  

    Apparatus has been developed for the acquisition of 3D X-ray commuted tomography images in cone-beam geometry. The equipment consists of a microfocal X-ray source operating at photon energies of up to 30 kVp with a focal spot size of 10 μm, a computer-controlled stage for rotating the object, a 2D multi-wire gas proportional X-ray counter and a microcomputer to control image acquisition. Projec... View full abstract»

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  • IEE Colloquium on `Medical Scanning and Imaging Techniques of Value in Non-Destructive Testing' (Digest No.84)

    Publication Year: 1989
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (16 KB)  

    The following topics were dealt with: ultrasound techniques; thermal imaging; computerised tomography; isotopic sources; X-ray microtomography; magnetic resonance imaging; and applied potential tomography View full abstract»

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  • Principles and pitfalls of flow assessment by Doppler ultrasound [in diagnostic medicine and NDT]

    Publication Year: 1989 , Page(s): 3/1 - 3/4
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (312 KB)  

    A number of techniques have been cited for the analysis of pulsatile flow, and of flow in embedded vessels of unknown geometry. Movement detection, and the repetition rate of cyclic processes can also be monitored with Doppler ultrasound. The accurate estimation of flow is not always possible due to the limitations outlined, but waveform analysis may of itself be helpful in understanding the behav... View full abstract»

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  • Low-cost magnetic resonance imaging

    Publication Year: 1989 , Page(s): 8/1 - 8/4
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (144 KB)  

    It is possible, at relatively low cost, to build an MRI system capable of most routine MR sequences. All MRI systems of this type are limited to imaging objects which contain mobile protons, e.g. water, oil. Typical applications include human anatomy and pathology investigations, monitoring of biological specimens (plants and animals), location of water and oil in geological samples and monitoring... View full abstract»

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  • Observing fluid mixing using electrical impedance tomography/applied potential tomography

    Publication Year: 1989 , Page(s): 10/1 - 10/3
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (120 KB)  

    The image technique developed for in-vivo imaging has been shown capable of observing and measuring fluid mixing. The noise level approximately 1% is probably adequate for many experimental uses. However, the in-vivo cardiac gating work has shown that averaging can be used to reduce the noise level. The present data collection system is a serial system; by using parallel data collection the noise ... View full abstract»

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  • Infrared thermal imaging

    Publication Year: 1989 , Page(s): 4/1 - 4/5
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (236 KB)  

    The author briefly discusses the technique of thermal imaging which involves the detection of thermal infrared radiation in wavebands of 2 μm and above. The potential of this wholly nondestructive method in both NDT and medical situations is then examined View full abstract»

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  • NMR multipulse imaging of solid and other short T2 systems using sinusoidal gradients

    Publication Year: 1989 , Page(s): 9/1 - 9/5
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (364 KB)  

    It has been said that solid state MRI is a decade behind liquid state MRI. Liquid state imaging started in 1973. The first clinical trials were in the late 70's and early 80's. The current rush of solid state MRI papers began in 1984. Now, in the late 80's one is beginning to see the first practical applications of solids imaging. The aim must be to make available for solid state NDE using MRI all... View full abstract»

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  • High frequency, high resolution ultrasound techniques in medicine

    Publication Year: 1989 , Page(s): 2/1 - 2/4
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (304 KB)  

    The authors briefly review the development of new copolymer materials. They also cover the design and construction of transducers from such materials, including multi-element linear and phased arrays. The uses that such transducers can be put to, showing results from A-scans, B-scans and Doppler blood flow measurements are then presented. Finally, some indications of the industrial applications of... View full abstract»

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  • Theoretical understanding of imaging and NDT techniques

    Publication Year: 1989 , Page(s): 5/1 - 5/4
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (168 KB)  

    The use of photon and charge particle beams for imaging and NDT and calculations for these applications and their interpretation require an understanding of the fundamental physical processes leading to attenuation of the beam. Two examples of image reconfiguration in X-ray CT and SPECT serve to illustrate what is required View full abstract»

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  • Ultrasound techniques

    Publication Year: 1989 , Page(s): 1/1 - 1/4
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (264 KB)  

    The aims of the author's presentation are to indicate how ultrasound data are at present utilised in medical scanning, as well as to overview the newer avenues that are being pursued in order to enhance the retrieval of additional, but latent, information from the ultrasound signals. Despite many points of similarity, there are often distinct differences in the way ultrasound can be applied and ex... View full abstract»

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