Title :
X-ray cone-beam breast computed tomography: Phantoms studies on microcalcifications Visibility
Author :
Lauria, Adele ; Mettivier, G. ; Montesi, Maria Cristina ; Russo, P.
Author_Institution :
Dipt. di Sci. Fisiche, Univ. di Napoli Federico II, Naples, Italy
fDate :
Oct. 24 2009-Nov. 1 2009
Abstract :
The purpose of this study is to evaluate the microcalcifications (MCs) detection capability of the BCT (Breast Computed Tomograph) scanner developed at by our group. The studies have been conducted using a breast phantom with MC inclusions simulated by small fragments of egg-shell (dimensions 350÷450 ¿m). The MCs are positioned in a cluster configuration in regions of interest (ROI) with a diameter of about 8 mm at different depths inside the phantom. The better conditions for MCs visibility/detectability have been investigated as a function of the detector pixel size (50, 200 ¿m), at different air Kerma (5, 7.5, 9 mGy) at X-ray tube voltage 80 kVp.
Keywords :
biological organs; computerised tomography; image reconstruction; image resolution; medical image processing; phantoms; X-ray cone-beam breast computed tomography; X-ray tube voltage; air Kerma; breast phantom; detector pixel size; egg-shell small fragments; microcalcifications; radiation absorbed dose 5 mGy; radiation absorbed dose 7.5 mGy; radiation absorbed dose 9 mGy; reconstruction voxel; size 200 mum; size 50 mum; Breast; Computed tomography; Imaging phantoms; Nuclear and plasma sciences; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium Conference Record (NSS/MIC), 2009 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4244-3961-4
Electronic_ISBN :
1095-7863
DOI :
10.1109/NSSMIC.2009.5401556
