Table 3.

Summary of tally regions, tissue contents within each tally region, and mean dose estimates measured

Tally region	Tissue(s) in tally region	Doses calculated
#1: 0.6 cc volume	Brain parenchyma	D brain,1
#2: central slab	Brain parenchyma, bone	D brain,2 , D bone,2 , D wt‐avg,2
#3: entire scan volume	Brain parenchyma, bone	D brain,3 , D bone,3 , D wt‐avg,3