Dual energy CT scan (DECT scan)

What is a dual energy CT (DECT) scan?

DECT scan is a CT scanner that has two x-ray tubes capable of producing different energies (80 kV and 140 kV). Image reconstruction algorithms detect uric acid deposits based on their lower attenuation of x-rays than calcium (bone). By color coding the different attenuation values (uric acid versus calcium), the uric acid deposits can be demonstrated in addition to bone. Findings of urate by DECT has been adopted as a diagnostic criterion for the diagnosis of gout.

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