Applications of dual energy CT in clinical practice: A pictorial essay
| Autor: | Parang Sanghavi, Bhavin Jankharia |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
medicine.diagnostic_test
business.industry Attenuation R895-920 Digital Enhanced Cordless Telecommunications Clinical Practice Material Separation Uric acid crystals Medical physics. Medical radiology. Nuclear medicine uric acid material Angiography medicine Enhancing Lesion iodine map Radiology Nuclear Medicine and imaging Dual energy ct Recent Advances business metal artefact Biomedical engineering dual energy ct |
| Zdroj: | Indian Journal of Radiology and Imaging, Vol 29, Iss 03, Pp 289-298 (2019) The Indian Journal of Radiology & Imaging |
| ISSN: | 1998-3808 0971-3026 |
| DOI: | 10.4103/ijri.IJRI_241_19 |
| Popis: | In dual-energy CT (DECT), two different x-ray spectra are used to acquire two image datasets of the same region, to allow the analysis of energy-dependent changes in the attenuation of different materials. Each type of material demonstrates a relatively specific change in attenuation between images obtained with a high-energy spectrum and those obtained with a low-energy spectrum. Based on the relatively specific change in attenuation with two different energies, material composition information can be obtained to allow tissue characterization. The DECT ability of material differentiation allows bone removal in various CT angiography studies and bone marrow edema depiction, while with material optimization, metal artefacts can be significantly reduced to almost nil. DECT allows material separation to differentiate uric acid crystals from calcium to determine the composition of urinary calculi and to diagnose gout. Using the DECT ability of material decomposition, iodine maps can be generated, which are useful in the evaluation of any enhancing lesion in the body without the need to obtain a plain scan and allow perfusion maps to be created in cases of pulmonary thromboembolism. |
| Databáze: | OpenAIRE |
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