I have chosen this number of cases because you need to cover breadth for FRCR 2B! There is a fine line between information overload and sufficient cases!
Cases 1-10
Foundation nuclear medicine cases covering bone scans and basic thyroid studies.
Cases 11-20
Intermediate cases covering more complex thyroid and renal studies.
Cases 21-30
Advanced cases consolidating your technique across the full range of nuclear medicine presentations.