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Example of superior detector angulation. Superior (further cranial) angulation of the detector, without lateral angulation, yields an equivalent steep RAO cranial appearance of the left coronary, in essence an “inverse spider.” Ao, aorta; LAD, left anterior descending artery; LCx, left circumflex artery; LMCA, left main coronary artery; RAO, right anterior oblique. [Color figure can be viewed at wileyonlinelibrary.com]
