VOL. XX, N. 2, 2004, April-June	page
Original Papers
Tillman Riess, Theobald Fuchs, Willi Kalender A new method to identify and to correct circular artifacts in X-ray ct images abstract	43
Sunil Dutt Sharma, Cinzia Mordacchini, Raffaele Novario, Leopoldo Conte, Bhuwan Chandra Bhatt Comparative Dosimetric Analysis of Varian mlc Only and Jaw Collimator Shaped Fields abstract	57
F. Cusanno, F. Garibaldi, S. Colilli, M. Gricia, F. Giuliani, M. Lucentini, F. Santavenere, G. M. Urciuoli, E. Cisbani, R. Pani, R. Pellegrini, M. N. Cinti, R. Scafè Preliminary Evaluation of Compact Detectors for Hand-Held Gamma Cameras abstract	65
Technical Note
Laura De Nardo, Valentina Cesari, Nicole Iborra, Valeria Conte, Paolo Colautti, Joël Herault, Giorgio Torniellii, Pierre Chauvel Microdosimetric Assessment of Nice Therapeutic Proton Beam Biological Quality abstract	71