Table 1.

Tumor volume comparison for retrospective patients who underwent radiosurgery for pituitary tumor.

	Multiple Regression Method					Modified Jentzen Method
Patient #	Initial thres.	Initial vol (cc)	Final thres.	Calc. vol (cc)	Volume diff. (cc)	Initial thres.	Initial vol (cc)	Final thres.	Calc. vol (cc)	Volume Diff. (cc)	Manual Delin. Vol (cc)
1	69	0.38	72	0.28	0.14	61	0.55	66	0.3	0.12	0.42
2	64	0.74	64	0.74	$-0.21$	57	0.86	60	0.8	$-0.27$	0.53
3	68	0.44	70	0.37	0.11	60	0.75	63	0.6	$-0.12$	0.48
4	73	0.49	75	0.43	$-0.16$	65	0.72	68	0.62	$-0.35$	0.27
5	75	0.28	81	0.22	0.12	66	0.42	72	0.32	0.02	0.34
6	66	1.68	64	0.77	$-0.28$	59	1.86	60	0.85	$-0.36$	0.49
7	56	1.02	56	0.32	0.02	50	1.46	52	1.3	$-0.96$	0.34
8	41	4.4	39	4.74	$-1.31$	37	5.12	38	5	$-1.57$	3.43
9	46	1.39	46	1.39	$-0.36$	42	2.02	43	1.95	$-0.92$	1.03
10	45	1.83	44	1.86	$-0.95$	41	1.9	42	1.88	$-0.97$	0.91

Volume difference = Manual delineated volume ‐ Calculated volume.