Radbook 2016

mono-energetic images can be recon- structed with low noise across the entire range from 40keV to 200keV. Having this at your fingertips offers great value of enhancing Iodine or reducing artifacts. Use also retrospectively Another advantage of the Dual Layer detec- tor design is that in the IQon Spectral CT, spectral information is obtained in parallel during normal image acquisition. Aside from conventional images, every 120kV scan simultane- ously provides Dual Energy data sets – even if the clinical inquiry does not initially indicate it. In other words:The radiologist no longer has to make the decision as to whether use a normal CT image or a spectral protocol before the scan. Both data sets are available after the examination. If suspicious structures or structures which are difficult to interpret are observed in the“normal”CT scans, addi- tional information about the tissue com- position becomes desirable, the system can immediately provide the spectral information. If required, each scan can also be shown spectrally without added time requirements due to a second scan and without the additional dose required for a second scan. Users have the security of being able to fall back on a broad range of Spectral information like virtual MonoE and VNC images, using the MagicGlassWindow technique as needed. The MagicGlass tool simultaneously shows spectral data in colour if one guides it over the underlying HU image dataset (HU = Hounsfield units). Whether there is an additional need for tissue characteri- zation, contrast enhancement or artifact reduction, the information is there to provide the support for the diagnosis and make diagnostics more convenient. www.usa.philips.com/healthcare Comparison of conventional and mono-energetic images: Looking at low mono-energetic images, Iodine can be enhanced.The remaining Iodine in portal phase or late phase scans is still sufficient to reconstruct cta like images. Low MonoE images need less iodine con- centration to visualize vessel anatomy. Due to the MagicGlassTool, the image can be shown in up to four different display forms simultaneously, each of which emphasizes specific Spectral characteristics such asVNC and Effective Atomic Number. The radiologist receives all information at a glance without having to open additional windows or programs. RADBOOK 2016 25 COMPUTED TOMOGRAPHY  ◼ RADBOOK 201625

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