<prompt> Insal-Salvati index is used for ?OlecranonPatellaTalusScaphoid  <response>: Ans. is b i.e., Patella Two radiological indices are commonly used for determining the position of patella - Insall-Salvati index It is the ratio of patellar tendon length to patella length. Normally it is 1-0. An index of 1.2 or more is seen in patella alta high riding patella. An index of 0.8 or less is seen in patella baja low lying patella. Blackbume-Peel lindex It is the ratio of i the distance of tibial plateau to inferior aicular surface of patella numerator, to ii length of aicular surface of patella denominator. Normally it is 0.8. An index of 1 or more is seen in patella alta. 