In this method, the SIJ is divided, as in SPARCC, into 4 quadrants in the semicoronal plane. BME are scored for the whole series of slices covering the cartilaginous joint compartment in each quadrant ranging between 0 and 3 according to the extent of BME. The following BME scores are used: 0 for absence, 1 if involvement of < 33% of the quadrant area, 2 if between >33% and <66% of the quadrant area is involved and 3 when involving > 66% of the quadrant area, giving a maximal BME score of 12 for each joint and 24 per individual, doi: 10.1136/ard.2010.147033.
Recently the Berlin method has been modified to include additional quantification of structural changes dividing the joints into anterior, middle and posterior portions thereby generating 24 regions per individual, doi:10.1136/annrheumdis2016210640 and doi:10.1136/rmdopen2021001656.
