- Inlet View of the Pelvis: (cauded projection) 
- caudad projection, also called inlet view, best demonstrates
ring configuration of pelvis, & narrowing or widening
of diameter of ring is immediately apparent.
- evaluates for
posterior displacement of pelvic ring or
opening of pubic symphysis;
-
technique:
- x-ray beam is parallel to plane of sacrum, & sacrum is seen on
end w/ vertebral body anteriorly & sacral lamina posteriorly;
- pt is positioned as in
AP view of pelvis w/ beam tilted
25 degree caudally;
- or taken by directing X-ray beam 60 deg from head to mid pelvis,
is best radiographic view to demonstrate posterior displacement;
- Outlet View: (cephalad projection)
- cephalad projection, also called the outlet or tangential view,
shows the anterior ring superimposed on the posterior ring.
- evaluates for
vertical shift of pelvis (migration of hemipelvis);
- proximal or distal displacements of anterior or posterior
portion of ring are best appreciated on this view;
- sacrum appears in its longest dimension, w/ neural foramina evident.
-
technique:
- x-ray beam is perpendicular to plane of sacrum.
- pt is positioned as in
AP view of pelvis w/ beam tilted
35 deg cephalad;
