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Dual energy computed tomography: basic principles and applications
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Abstract
SUMMARY
Computed tomography is a modern medical imaging with rapid development and many technical advances. Dual energy CT (DECT) is adevelopment that offers great promise to increase the CT potential. Conventional CT utilizes a single X ray beam and contrast image is generated by the differences in photon attenuation of materials. In DECT, two energy levels are used to acquire images.The tube potentials are mostly set to 140 and 80 kVp to obtain the largest spectral difference. DECT
differsmaterial composition by different photon energy levels. DECT is widely indicated and some indications are routineclinical use. Clinical applications include, for example, the assessment of contrast enhancement in focal organ lesions, pulmonary perfusion, angiography with bone removal and display of plaque distribution, kidney stone differentiation, and detection of tophi... This article introduces some basic principles and clinical applications of DECT.
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Keywords
Dual energy CT, spectral, contrast image, attenuation, materials
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