A Multiple Image Subtraction Technique for Enhancing Low Contrast, Periodic Objects

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Abstract
A silicon target storage tube has been used in a new technique for enhancing time-dependent mass differences. The storage tube's unique ability far positive and negative video integrations is used. The method relies upon summing the differences of a series of consecutive positive and negative images taken in synchrony with the instants of maximum deviation of a time-dependent mass. Possible applications include the production of arterial maps by exploiting the small pulsatile distention of the pulmonary arteries or the motion of the vessels in the region of the aortic arch. The details of this technique and our preliminary results using phantems are discussed.

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