Affiliations: National Institutes of Health, National Institute of
Biomedical Imaging and Bioengineering, Bethesda, USA | Department of Radiology, University of Iowa, Iowa
City, USA | Toshiba America Medical Systems, Tustin, USA | National Institutes of Health, National Cancer
Institute, Rockville, USA
Abstract: Multirow CT detectors coupled with 2, 4, 8 and 16 or more
simultaneous data acquisition channels are now used in clinical imaging.
Furthermore, multirow CT detectors are used with conventional or flat-panel
image intensifiers mounted on c-arms that allow 3D CT scanning in rotational
angiography or orthopedic interventions. These multirow, multichannel CT
systems provide increased speed that translates into the ability to scan larger
segments of anatomy more quickly. The principal drawback of
multislice/multidector/multichannel CT scanners are increased computational
burden, faster data rates, more voluminous data sets, and most importantly, the
requirement to use cone beam rather than slice-by-slice reconstruction
algorithms. The future of multichannel CT in clinical applications demands
improved radiation dose efficiency, isotropic imaging, tailored cone beam
reconstruction algorithms, and post-processing visualization of volume image
data.
