Superimposition of vessels and foreshortening of the proximal left anterior descending coronary artery can be diminished by 1) a single plane ciné technique with the patient elevated, 2) a lateral ciné technique with an angled beam, 3) a cut film technique with a horizontal beam which reveals any layering effect of contrast material, and 4) by angling a U-arm or the patient into position.
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Eldh et al. (1974) studied this question.
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