Semiautomatic Segmentation of Ventilated Airspaces in Healthy and Asthmatic Subjects Using Hyperpolarized ³He MRI

Table 1

Subject demographics and spirometry measurements.

Subject	Sex,; M/F	Age,; yr	Height,; cm	Weight,; kg	BMI	FEV1,; L	FEV; %Pred	FVC,; L	FEV1/FVC	FEV1/FVC; %Pred	PC20
Healthy
H1	F	23	153	44	18.8	2.98	100	3.41	87.4	101	>25
H2	F	22	175	68	22.2	3.67	109	3.88	94.6	108	>25
H3	M	23	180	82	25.2	4.18	88	4.35	96.1	115	>25
H4	M	21	189	73	20.4	4.02	79	4.11	97.8	116	>25
Asthmatic
A1	F	19	155	54	22.3	2.81	87	3.36	83.6	93	0.12
A2	F	23	157	61	24.7	2.81	91	3.21	87.5	101	0.17
A3	F	21	163	73	27.5	3.35	102	3.73	89.8	104	1.11
A4	M	23	188	93	26.4	4.43	86	5.63	78.7	94	0.17
A5	F	22	172	80	26.9	3.45	94	4.32	79.9	92	3.31
A6	F	22	157	55	22.1	2.51	80	3.34	75.1	87	0.12