Download Dual Energy CT in Oncology by Carlo N. De Cecco, Andrea Laghi, U. Joseph Schoepf, Felix G. PDF

By Carlo N. De Cecco, Andrea Laghi, U. Joseph Schoepf, Felix G. Meinel

The objective of this ebook is fourfold: to explain the elemental ideas of twin power CT (DECT) imaging, to give an explanation for how post-processing is applied, to significantly appraise the strengths and weaknesses of the approach in oncologic imaging, and exceptionally, to illustrate the contribution of DECT within the administration of oncologic sufferers. details is equipped at the perform and interpretation of DECT and its effect on medical choice making in quite a few oncological settings, together with tumors of the top and neck, lung, liver, pancreas, gastrointestinal process, kidney, and musculoskeletal system.

DECT is an cutting edge imaging strategy during which the appliance of 2 particular power settings presents a transition from density-based snapshot to spectral imaging.

As designated during this ebook, DECT acquisition permits the simultaneous iteration of a number of datasets which allow the radiologist to deal with diversified diagnostic difficulties in oncologic imaging utilizing a multiparametric procedure, having transparent merits in tumor detection, lesion characterization and overview of remedy response.

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Initial experience on the use of iodine content and iodine overlay measurements in the head and neck region demonstrated feasibility and simplicity of this method. 3 Dual Energy CT in Head and Neck Tumors 39 Preliminary results reported a promising role of DE, especially iodine content quantification method, in characterization of cervical lymphadenopathy [21]. 7 Dual Energy CT in Brain Tumors Studies investigating the use of DECT in imaging of primary or metastatic brain tumors are limited because MRI, rather than CT, is usually the modality of choice for brain imaging.

Animal studies [25] have concluded that the use of DECT iodine distribution maps may improve the sensitivity of CTPA, in particular for peripheral subsegmental emboli, but this has not been conclusively demonstrated in clinical studies. If DE-CTPA is routinely performed in patients with suspected pulmonary embolism, it is not uncommon to see one or more small peripheral perfusion defects with a pattern suggestive of embolic disease in patients in whom no intravascular filing defects are visualized on the morphological CT reconstructions (Fig.

In this setting, CT can demonstrate ventilation/perfusion mismatch (Fig. 7) [39, 40]. 5 Optimization of Image Properties Using Dual Energy–based Postprocessing Acquiring data with two different spectra offers additional possibilities for postprocessing (Fig. 8). Based on the image characteristics with the two different spectra, virtual monoenergetic images can be generated, which simulate acquisition at specific photon energies. Extrapolation to high photon energies can reduce beamhardening artifacts from metallic implants [41].

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