Table 4:

BT site of involvement and temporal characteristics^a

Groups	Superior	Middle	Inferior	Temporal-Improvingb	Temporal-Transientc
FS		6	16	5	11
Brain		8	28	13	16

^aThe location of the black turbinates and the change in enhancement during multiple series are shown. Because a patient can demonstrate BT in >1 turbinate (ie, both the middle and inferior turbinates can show BT simultaneously), the total number of turbinates seen with BT is larger than the number of cases in each group.

^bBT persists across all sequences but improves gradually.

^cBT resolves on later sequences.