Support apparatus, system, and method for positioning a patient

A support apparatus configured to support a patient's anatomy, the support apparatus comprising:

• at least one support configured to support a patient's anatomy, the at least one support comprising at least one base portion removably attached to at least one top portion;
• at least one locator configured to removably locate the support apparatus to a patient table of a target modality;
• at least one directional guide having a set distance of travel;
• at least one shuttle coupled to the at least one support, configured to slidably adjust the support along the at least one directional guide;
• at least one releasable lock configured to restrict movement of the at least one shuttle along the at least one directional guide in a first engaged configuration, and enable movement of the at least one shuttle along the at least one directional guide in a second disengaged configuration;
• wherein a gross position of the support apparatus is selected by locating the at least one locator to a corresponding structure on the patient table of the target modality and wherein a position of the support apparatus may be finely adjusted in discrete increments along the set distance of travel of the at least one directional guide;
• and
• wherein the at least one base portion is additionally directly or indirectly coupled to the at least one directional guide, the at least one locator, the at least one shuttle, and the at least one releasable lock, wherein the at least one base portion has irregular geometry, such that the at least one base portion is configured to be oriented in at least a first orientation and a second orientation, and wherein the irregular geometry of the at least one base portion permits the at least one base portion to be positioned at a first height in the first orientation and at a second height in the second orientation.