Preliminary images from an adaptive imaging system
Φόρτωση...
Ημερομηνία
Συγγραφείς
Griffiths, J. A.
Metaxas, M. G.
Pani, S.
Schulerud, H.
Esbrand, C.
Royle, G. J.
Price, B.
Rokvic, T.
Longo, R.
Asimidis, A.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Physica Medica
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
I-ImaS (Intelligent Imaging Sensors) is a European project aiming to produce real-time adaptive X-ray imaging systems using Monolithic Active Pixel Sensors (MAPS) to create images with maximum diagnostic information within given dose constraints. Initial systems concentrate on mammography and cephalography. In our system, the exposure in each image region is optimised and the beam intensity is a function of tissue thickness and attenuation, and also of local physical. and statistical parameters in the image. Using a linear array of detectors, the system will perform on-line analysis of the image during the scan, followed by optimisation of the X-ray intensity to obtain the maximum diagnostic information from the region of interest white minimising exposure of diagnostically less important regions. This paper presents preliminary images obtained with a small area CMOS detector developed for this application. Wedge systems were used to modulate the beam intensity during breast and dental imaging using suitable X-ray spectra. The sensitive imaging area of the sensor is 512 x 32 pixels 32 x 32 mu m(2) in size. The sensors' X-ray sensitivity was increased by coupling to a structured Csl(Tl) scintillator. In order to develop the I-ImaS prototype, the on-line data analysis and data acquisition control are based on custom-developed electronics using multiple FPGAs. Images of both breast tissues and jaw samples were acquired and different exposure optimisation algorithms applied. Results are very promising since the average dose has been reduced to around 60% of the dose delivered by conventional imaging systems without decrease in the visibility of details. (C) 2008 Published by Elsevier Ltd on behalf of Associazione Italiana di Fisica Medica.
Περιγραφή
Λέξεις-κλειδιά
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://WOS:000257546600014
http://ac.els-cdn.com/S1120179708000215/1-s2.0-S1120179708000215-main.pdf?_tid=530cf85d6169c4ce83508b703090d88a&acdnat=1334229878_e1549724285778667ca9bf633c0736d8
http://ac.els-cdn.com/S1120179708000215/1-s2.0-S1120179708000215-main.pdf?_tid=530cf85d6169c4ce83508b703090d88a&acdnat=1334229878_e1549724285778667ca9bf633c0736d8
Γλώσσα
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών