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A cohort of 204 patients were randomly divided into 2 groups. Patients in group A (n = 102) underwent 80-kVp CTA with 30 mL of contrast agent, while patients in group B (n = 102) underwent conventional CTA (120 kVp, 60 mL of contrast agent). With DSA as a reference standard, diagnostic accuracy on a per-aneurysm basis was 89.9% for group A and 93.9% for group B. The authors conclude that in detecting intracranial aneurysms, 80-kVp/30-mL contrast CTA provides the same diagnostic accuracy as conventional CTA with substantial radiation dose and contrast agent reduction.

Sixty patients with idiopathic normal pressure hydrocephalus underwent presurgical brain MR imaging and clinical evaluation before and 1 year after shunt surgery. The authors assessed the MR imaging features including Evans index, high-convexity tightness, Sylvian fissure dilation, callosal angle, focal enlargement of the cortical sulci, bumps in the lateral ventricular roof, and deep white matter and periventricular hyperintensities. Multiple linear regression analyses demonstrated that presurgical high-convexity tightness alone predicted the improvement of the clinical symptoms 1 year after surgery.