x-ray projection
41frontal projection — a radiographic projection in which the central ray is perpendicular to the frontal plane; it may be either anteroposterior or posteroanterior …
42half-axial projection — a radiographic projection of the head with the central ray at an angle to the frontal and medial planes; it may be either anteroposterior or posteroanterior. Called also semiaxial p …
43Heinig projection — a radiographic projection for visualization of the sternum and sternoclavicular joint; the upper limb closer to the tube is abducted over the head and the central ray enters the body from an inferior lateral direction, angling toward the opposite …
44Hermodsson projection — a rare type of radiographic projection for evaluation of an unstable or repeatedly dislocating shoulder that may have a subtle condition such as the Hill Sachs lesion; the patient stands with the affected upper limb behind the back and the hand… …
45Hughston projection — a radiographic projection of the patellofemoral region, with the patient prone, lower limbs at 50 to 60 degrees of flexion, and the central ray at 45 degrees from vertical passing tangentially across the knee …
46inferosuperior projection — any radiographic projection in which the central ray enters the body or a body part from below …
47lateral projection — a radiographic projection in which the central ray enters the body or part from the side and is perpendicular to the medial or axial plane …
48oblique projection — a radiographic projection in which the central ray enters the body or part at an angle to the frontal and medial or axial planes …
49open-mouth projection — an anteroposterior projection of the cervical spine, particularly the axis and atlas, done through the open mouth with the patient supine and the central ray pointing vertically downward …
50pillar projection — a radiographic projection of the articular pillars of the cervical spine, usually with the patient supine and the central ray angled slightly toward the feet from a position above the face; for an unobstructed view, the head may be rotated so… …
