Dots per inch (DPI, or dpi) is a measure of spatial printing or video dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm). Monitors do not have dots, but do have pixels; the closely related concept for monitors and images is pixels per inch or PPI.
The iliac crest is the curved superior border of the ilium, the largest of the three bones that merge to form the os coxa, or hip bone. It is located on the superior and lateral edge of the ilium very close to the surface of the skin in the hip region. When a person places their hands on their hips, it is the skin above the iliac crest that they rest their hands on.
The bone graft can be harvested from the front (anterior iliac crest) or from the back (posterior iliac crest) of the pelvis. The ilium is also a source for harvesting bone marrow aspirate, which contains cells that serve to stimulate bone formation.he bone graft can be harvested from the front (anterior iliac crest) or from the back (posterior iliac crest) of the pelvis. The ilium is also a source for harvesting bone marrow aspirate, which contains cells that serve to stimulate bone formation.