Title :
Transmission imaging with a compact gamma camera: initial results for mammotomography
Author :
Tomai, M.P. ; Archer, Caryl N. ; Bowsher, James E. ; McKinley, Randolph L. ; Jaszczak, Ronald J.
Author_Institution :
Dept. of Radiol., Duke Univ., Durham, NC, USA
Abstract :
A dedicated single photon emission prototype imaging system is intended for fully 3D Application Specific Emission and Transmission Tomography (ASETT), where one specific application is dedicated breast imaging. In breast imaging, this dual-modality system may be useful for (1) improving detectability of low contrast lesions with X-ray CT imaging, (2) emission quantification using the transmission images, and (3) better interpretation of the reconstructed emission data by facilitating objective region selection. Each imaging component needs independent development, optimization and characterization. The prototype SPECT component using a NaI(Tl) based gamma camera has been built and initially evaluated with small, low contrast breast lesions; resolution and sampling issues ire under investigation with the arbitrary orbits possible with the hemispherical positioning capability.
Keywords :
cameras; diagnostic radiography; gamma-ray detection; image reconstruction; mammography; medical image processing; single photon emission computed tomography; solid scintillation detectors; 3D Application Specific Emission and Transmission Tomography; ASETT; NaI(Tl) based gamma camera; NaI:Tl; SPECT; X-ray CT imaging; breast imaging; compact gamma camera; dual-modality system; mammotomography; reconstructed emission data; single photon emission prototype imaging system; transmission imaging; Breast; Cameras; Computed tomography; Lesions; Optical imaging; Prototypes; Single photon emission computed tomography; X-ray detection; X-ray detectors; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2002 IEEE
Print_ISBN :
0-7803-7636-6
DOI :
10.1109/NSSMIC.2002.1239628