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Development of a small-field quasi-monochromatic computer tomography system

Gambaccini, M; Fantini, A; Marchesini, R; Sabba, N; Sartori, L; Tuffanelli, A; ... Del Guerra, A; + view all (2000) Development of a small-field quasi-monochromatic computer tomography system. In: PHYSICA MEDICA. (pp. 161 - 164). ISTITUTI EDITORIALI E POLGRAFICI INTERNAZIONALI: PISA, ITALY.

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Abstract

The diagnostic potentiality of x-ray tomography could be very useful to improve the performance of Single photon Emission Tomography by means of the fusion of morphological images with functional ones, Moreover an improvement in image-quality and a reduction in patient dose of CT imager could be achieved by means of monochromatic (or quasi-monochromatic) x-ray beams. Narrow-energy-band and tunable sources ale ideal for CT because they can improve the image quality by overcoming the beam hardening effect and can reduce the dose delivered to the patient by selecting the more suitable energy. Several monochromatic CT experiments have been performed so far using synchrotron radiation. Because of the cost and size of synchrotron facilities, the development of new technologies for monochromatic x-ray CT is desirable. To this aim, we have performed experiments to verify if a Bragg diffraction based x-ray source can be used in x-ray CT. Small field CT images of test object and biological samples have been obtained. Image uniformity, contrast resolution and spatial resolution have been evaluated.

Type:Proceedings paper
Title:Development of a small-field quasi-monochromatic computer tomography system
Event:Satellite Symposium of the European-Congress-of-Radiology
Location:VIENNA, AUSTRIA
Dates:2000-03-05 - 2000-03-10
Publisher version:http://www.physicamedica.com/
Keywords:CT, monochromatic beams, Bragg diffraction
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Medical Physics and Bioengineering

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