(Tuesday, 7/16/2019) 10:00 AM - 12:15 PM
Room: Pins Room | Hall 2
With thin slice capability and ever-increasing acquisition speeds, the CT scanner is the workhorse of imaging departments. The standard CT scanner acquires images with a single energy source, which can lead to suboptimal soft tissue differentiation. In the 1970’s, a scanner with two different energy sources was proposed to exploit the variable attenuation properties of different materials and provide improved soft tissue visualization. In the ensuing years, technological advances have enabled the movement of the DECT scanner from concept to reality. Numerous commercial designs are currently available from multiple vendors. A single-source and single detector design uses two consecutive scans, at two energies, to create a dual energy data set. Another single source and single detector design employs varying filters at the detector level to create a dual energy dataset in a single acquisition while a fast switching design uses a single-source, that rapidly alternates energies, in combination with a single detector to acquire a dual energy dataset in a single scan. In addition, a two source and two detector design acquires a dual energy CT dataset simultaneously. While each design provides a dual energy dataset for improved soft tissue differentiation, there are also inherent limitations. In this session, the basic principles of DECT will be presented. Vendors will present their dual-energy CT designs and solutions including image acquisition, post-processing abilities, applications and limitations.
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