In the SIO projection, the central ray is directed in which direction?

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Multiple Choice

In the SIO projection, the central ray is directed in which direction?

In a superoinferior oblique (SIO) projection, the central ray is directed toward the midline of the chest. This medial angulation helps project the medial and central portions of the breast into the same imaging plane and reduces overlap with other tissue, making lesions in the inner breast more conspicuous. Directing the beam laterally, anteriorly, or posteriorly would shift the area of interest out of the intended plane or fail to better visualize the medial tissue, compromising the view.

In a superoinferior oblique (SIO) projection, the central ray is directed toward the midline of the chest. This medial angulation helps project the medial and central portions of the breast into the same imaging plane and reduces overlap with other tissue, making lesions in the inner breast more conspicuous. Directing the beam laterally, anteriorly, or posteriorly would shift the area of interest out of the intended plane or fail to better visualize the medial tissue, compromising the view.

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