UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Experimental evaluation of a simple algorithm to enhance the spatial resolution in scanned radiographic systems

Olivo, A; Rigon, L; Arfelli, F; Cantatore, G; Longo, R; Menk, RH; ... Castelli, E; + view all (2000) Experimental evaluation of a simple algorithm to enhance the spatial resolution in scanned radiographic systems. MEDICAL PHYSICS , 27 (11) 2609 - 2616.

Full text not available from this repository.

Abstract

In order to ensure an early diagnosis of breast cancer, an imaging system must fulfil extremely stringent requirements in terms of dynamic range, contrast resolution and spatial resolution. Furthermore, in order to reduce the dose delivered to the patient, a high efficiency of the detector device should be provided. In this paper the SYRMEP/FRONTRAD (SYnchrotron Radiation for MEdical Physics/FRONTier RADiology) mammography project, based on synchroton radiation and a novel solid state pixel detector, is briefly described. Particular relevance is given to the fact that the radiographic image is obtained by means of a scanning technique, which allows the possibility of utilizing a scanning step smaller than the pixel size. With this procedure, a convolution between the real image and the detector point spread function (PSF) is actually acquired: by carefully measuring the detector PSF, it is possible to apply a post-processing procedure (filtered deconvolution), which reconstructs images with enhanced spatial resolution. The image acquisition modality and the deconvolution algorithm are herein described, and some test object images, with spatial resolution enhanced by means of the filtered deconvolution procedure, are presented. As discussed in detail in this paper, this procedure allows us to obtain a spatial resolution determined by the scanning step, rather than by the pixel size

Type:Article
Title:Experimental evaluation of a simple algorithm to enhance the spatial resolution in scanned radiographic systems
Publisher version:http://scitation.aip.org/medphys/
Language:English
Keywords:digital mammography, synchrotron radiation, microstrip detectors, deconvolution, spatial resolution
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Medical Physics and Bioengineering

Archive Staff Only: edit this record