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Purpose: To evaluate the vascular stenosis and collateral circulation in moyamoya disease using 4D CTA.Methods: Two neuroradiologists evaluated 4D CTA and DSA for 101 moyamoya patients. The performance of 4D CTA relative to DSA was determined using consistency checks (kappa values, 95% CI) and correlation analysis.Results: The kappa values were 0.714 (modified Suzuki score), 0.846 (Houkin score),...
To compare the utility of tumor size and CT perfusion parameters for differentiation of low- and high-grade clear cell renal cell carcinoma (RCC).Tumor size, Equivalent blood volume (Equiv BV), permeability surface-area product (PS), blood flow (BF), and Fuhrman pathological grading of clear cell RCC were retrospectively analyzed.High-grade clear cell RCC had significantly higher tumor size and lower...
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