title: Krenning score
text: # Krenning score
  
  The Krenning score is used to grade the uptake intensity of neuroendocrine tumors on somatostatin receptor imaging such as octreotide scan. Typically, peptide receptor radionuclide therapy (PRRT) is considered when the Krenning score is greater than 2.
  
  ## Krenning Score
  
  Grade 1: uptake < normal liver
  
  Grade 2: uptake = normal liver
  
  Grade 3: uptake > normal liver
  
  Grade 4: uptake > spleen or kidneys
  
  