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Material Separation Using Dual-Energy CT: Current and Emerging Applications
Radiographics, 2016-07, Vol.36 (4), p.1087
Patino, Manuel
Prochowski, Andrea
Agrawal, Mukta D
Simeone, Frank J
Gupta, Rajiv
Hahn, Peter F
Sahani, Dushyant V
2016
Details
Autor(en) / Beteiligte
Patino, Manuel
Prochowski, Andrea
Agrawal, Mukta D
Simeone, Frank J
Gupta, Rajiv
Hahn, Peter F
Sahani, Dushyant V
Titel
Material Separation Using Dual-Energy CT: Current and Emerging Applications
Ist Teil von
Radiographics, 2016-07, Vol.36 (4), p.1087
Ort / Verlag
United States
Erscheinungsjahr
2016
Link zum Volltext
Quelle
MEDLINE
Beschreibungen/Notizen
Dual-energy (DE) computed tomography (CT) offers the opportunity to generate material-specific images on the basis of the atomic number Z and the unique mass attenuation coefficient of a particular material at different x-ray energies. Material-specific images provide qualitative and quantitative information about tissue composition and contrast media distribution. The most significant contribution of DE CT-based material characterization comes from the capability to assess iodine distribution through the creation of an image that exclusively shows iodine. These iodine-specific images increase tissue contrast and amplify subtle differences in attenuation between normal and abnormal tissues, improving lesion detection and characterization in the abdomen. In addition, DE CT enables computational removal of iodine influence from a CT image, generating virtual noncontrast images. Several additional materials, including calcium, fat, and uric acid, can be separated, permitting imaging assessment of metabolic imbalances, elemental deficiencies, and abnormal deposition of materials within tissues. The ability to obtain material-specific images from a single, contrast-enhanced CT acquisition can complement the anatomic knowledge with functional information, and may be used to reduce the radiation dose by decreasing the number of phases in a multiphasic CT examination. DE CT also enables generation of energy-specific and virtual monochromatic images. Clinical applications of DE CT leverage both material-specific images and virtual monochromatic images to expand the current role of CT and overcome several limitations of single-energy CT. (©)RSNA, 2016.
Sprache
Englisch
Identifikatoren
eISSN: 1527-1323
DOI: 10.1148/rg.2016150220
Titel-ID: cdi_pubmed_primary_27399237
Format
–
Schlagworte
Algorithms
,
Contrast Media
,
Humans
,
Radiation Dosage
,
Radiographic Image Interpretation, Computer-Assisted - methods
,
Radiography, Dual-Energy Scanned Projection - methods
,
Sensitivity and Specificity
,
Subtraction Technique
,
Tomography, X-Ray Computed - methods
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