Accession Number : ADA589204


Title :   Stationary Digital Tomosynthesis System for Early Detection of Breast Tumors


Descriptive Note : Annual summary rept. 1 May 2011-30 Apr 2012


Corporate Author : NORTH CAROLINA UNIV AT CHAPEL HILL


Personal Author(s) : Qian, Xin


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a589204.pdf


Report Date : May 2012


Pagination or Media Count : 68


Abstract : Stable operation of the new developed s-DBT scanner at 28kVp anode voltage and 38mA tube current was demonstrated with extended lifetime and good source-to-source consistency. For standard imaging protocol of 15 views, 14 degree, 100mAs dose, and 2x2 detector binning the projection resolution along scanning direction is increased from 4.0 lps/mm (at 10% MTF) in DBT to 5.1 lps/mm in s-DBT at magnification factor of 1.1. The improvement is more pronounced for faster scanning speed, wider angular coverage, and smaller detector pixel size. The scanning speed depends on the detector, the number of views, and the imaging dose. With 240ms detector readout time the s-DBT system scanning time is 6.3s for a 15-view, 100mAs scan regardless of the angular coverage. The scanning speed can be reduced to less than 4s when detectors become faster. Initial phantom studies showed good quality reconstructed images.


Descriptors :   *BREAST CANCER , *TOMOSYNTHESIS , ANODES , DOSAGE , LIFE SPAN(BIOLOGY) , NEOPLASMS , SYNTHESIS , TOMOGRAPHY , VELOCITY , VOLTAGE , X RAYS


Subject Categories : Medicine and Medical Research


Distribution Statement : APPROVED FOR PUBLIC RELEASE