Table 1

The Preoperative and Postoperative Foraminal Heights on Axial CT Scans (mm)

	Proximal Recess				Lateral Foramen

	SurgiFile		Standard		SurgiFile		Standard

	Preop	Postop	Preop	Postop	Preop	Postop	Preop	Postop
Cadaver 1 L2—3	81	119	75	110	82	132	95	105
Cadaver 1 L3—4	60	132	60	100	75	130	75	100
Cadaver 1 L4—5	93	166	98	130	97	160	107	130
Cadaver 1 L5—S1	95	140	95	124	96	162	100	120
Cadaver 2 L2—3	62	95	70	75	75	100	80	85
Cadaver 2 L3—4	70	105	65	85	70	100	70	80
Cadaver 2 L4—5	50	100	70	95	70	110	75	106
Cadaver 2 L5—S1	80	105	80	100	100	120	100	100
Average	73.875	120.25	76.625	102.38	83.125	126.75	87.75	103.25