The original question was for help with the "Y" view of the scapular. I use the standing Napoleon position with a 15 degree caudal angle through the head of the humerus to show the space over the top of the humeral head. It is imperative that the body of the scapular is clear of the rib cage and projected in profile (ie perfectly lateral). You will have trouble with excessively muscular men, those with excessively rotund abdomens or ladies with very large breasts, and kyphitic people. Make what ever postural adjustments are neccessary with the aid of sponge blocks to get the scapular vertical and perpendicular to the vertical bucky. As for the lateral scapular view, I do mine AP with the forearm lying on top of the head along the sagital plane, patient rotated to the point where thr scapular is clear of the rib cage and using central beam perpendicular to the cassette.

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