Changes

Reliability [[File:Image quality checking of measurements increases if indicators of pelvic alignment are taken into accountpediatric pelvis.jpg|thumb|250px|Image quality checking. Tönnis introduced a quotient of pelvic ]]*Pelvic rotation can be evaluated by dividing the horizontal diameter of the obturator foramen of the right side and that of the left. In neutral rotation the ratio is 1 but is considered to be acceptable when it is between 0.56 and 1.8. The symphysis os-ischium angle of Tönnis evaluates the pelvic position in the sagittal plane. Lines are *Pelvic volar/dorsal tilt can be evaluated by lines drawn from the highest point of the ischium to the most prominent point of the symphysis, joining at the inside of the pelvis. The range of normal values is from 90 to 135° and is related to the infant’s age.<ref name="Ruiz SantiagoSantiago Chinchilla2016"/>