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.
Development of a small-field quasi-monochromatic computer tomography system
DEL GUERRA, ALBERTO
2000-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
