Table 2: Response to Radiotherapy.

Method of Measurement

Median % (Range) Decrease

Partial Response

"Normalized Partial Response"*

Linear

23% (-11-60)

3/21

6/21

Area

50% (-34-83)

11/21

11/21

Volume Ellipse

65% (-61-90)

14/21

12/21

Volume Segmented

59% (-11-91)

14/21

8/21

* See Text

Low Grade Glioma: A Measuring Radiographic Response to Radiotherapy