Figure 1.

Early versus late uptake. Twenty‐five aneurysms were imaged to compare early (24 hours) vs late (72 hours) or no uptake. Seven of the 25 aneurysms demonstrated early uptake. Of these 7 aneurysms, 4 were clipped and 3 were observed. All 3 observed aneurysms progressed to rupture, including a <7‐mm aneurysm. On the other hand, 18 of the 25 aneurysms did not show early uptake. Of these, 9 were clipped and 9 were observed. None of the observed progressed to rupture, including a giant aneurysm (The authors elected not to treat the aneurysm due to the patient's age and morbidity).