TABLE 1:

Demographic, clinical, treatment, and imaging data

Pt/Age, y/Sex	IV tPA	Initial NIHSS score	Time to First MR Study, h:min	Initial DWI Volume, cm3	Enhancement Pattern	Contrast Agent Dose†	Follow-Up Studies*	Hemorrhage
1/57/F	Yes	14	5:00	44.73	Vascular	1×	MR3, CT	AH
2/71/M	Yes	12	4:00	62.73	Parenchymal and vascular	1×	CT	SH
3/66/M	Yes	19	3:30	117.58	Vascular	1×	MR3, CT	None
4/72/F	Yes	16	4:00	17.65	Vascular	1×	MR3	None
5/56/M	Yes	10	3:00	18.59	Parenchymal and vascular	1×	MR3, CT	AH
6/68/M	Yes	15	5:30	28.09	Parenchymal and vascular	1×	MR3, CT	SH
7/63/F	No	14	6:00	33.66	Vascular	2×	MR3, MR7	AH
8/70/M	No	16	6:30	58.07	Vascular	2×	MR3, MR7	None
9/67/F	No	7	5:00	16.59	Vascular	2×	MR3, MR7	None
10/67/F	No	5	6:00	34.6	Vascular	2×	MR3, MR7	None
11/84/F	No	13	5:00	8.47	Vascular	2×	MR3, MR7	None
12/75/M	No	5	6:30	10.79	Vascular	2×	MR3, MR7	None
13/74/F	No	15	3:30	13.88	Vascular	2×	MR3, MR7, CT	None
14/52/M	No	10	5:00	35.6	Vascular	2×	MR3	None
15/77/M	No	16	2:00	12.92	Vascular	2×	MR3, MR7, CT	None
16/81/F	No	17	3:00	84.81	Vascular	1×	MR3, MR7	None
17/78/F	No	5	5:00	16.52	Vascular	2×	MR3, MR7	None
18/55/M	No	21	6:00	65.07	Vascular	2×	MR3, MR7	AH
19/77/M	No	7	6:30	2.3	Vascular	2×	MR3, MR7	AH
20/46/F	No	14	6:30	12.41	Vascular	2×	MR3, MR7	None
21/57/M	No	16	7:00	72.65	Vascular	2×	MR3, MR7	AH
22/78/M	No	20	3:30	90.43	Vascular	2×	MR3, MR7	AH

^*MR3 indicates MR imaging at day 3; MR7, MR imaging at day 7.

^†Gadopentetate dimeglumine dose, 0.1 mmol/kg (= 1×) or 0.2 mmol/kg (= 2×).