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View Full Version : Re: Marker shape in spiral CT-Scan ...



Bob Woolery, Dc
12-17-1998, 06:34 PM
Part of the problem is likely to be spot size in the X-ray tube. The
steady 36 KW could be anaged for with a 1.0 mm focal spot. with 1mm
markers, the penumbra due to finite spot size could account for a
boundary at 2.5 or 3 mm.
Lead shot would be an alternative to iron markers, but should be
painted or plated to avoid skin absorbtion. Iron shouldn't have special
artifacts on CT; only on MRI. Bob

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