Table 1.

Dosimetric comparison of IMRT and conventional (Std) spinal fields

Patient	%Vol. by 95% Dose		%Vol. > 110% Dose		Min (%) in Cord Band		Max (%) in Cord Band		Mean in Cord Band		Max in Patient Body (%)
	IMRT	Std	IMRT	Std	IMRT	Std	IMRT	Std	IMRT	Std	IMRT	Std
1	98.5	91	2.4	5.5	82.9	86.5	112	114	104	103	138.2	127.2
2	92.9	80.8	0	3.5	76	55.4	108.8	112.6	101.2	100.7	130.6	119.8
3	95.6	94	0	1.9	76.6	86.9	109.6	112.4	102	102.9	128.7	119.4
4	95	83.3	0	18.7	80.2	77.2	108.7	117.1	100.7	103	137.7	122.3
5	98.1	89.7	8.2	30.3	82.1	83	113.5	121.9	105.1	105.4	146.1	134.9
6	98	89.2	2.5	2.1	80.3	72.5	112.9	111.4	104.3	102.7	118.1	124.2
7	94.8	91.5	0	4.2	80.2	87.8	109.8	114.5	101.3	101.4	130.5	121.5
8	94	78.8	0.1	2.4	77.8	79.7	110.3	112.8	101.6	99.8	134.4	120.8
9	94.7	83.7	2.3	14.8	77.3	66.5	111.1	126.8	101.6	101.9	146.3	143.3
10	90.4	86.3	0	3.5	71.6	67	103	115.3	100	100.8	122.1	117.5
11	97.6	93.4	0	2.5	81.9	80.5	109.5	112.9	102.3	103.4	133.5	121.4