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.
These fractures are typically caused by vertically directed forces. Posterior iliac wing fractures that involve the weight bearing axis are unstable and may be extra-articular or involve the sacroiliac (SI) joint to some degree.hese fractures are typically caused by vertically directed forces. Posterior iliac wing fractures that involve the weight bearing axis are unstable and may be extra-articular or involve the sacroiliac (SI) joint to some degree.