Table 3:

Confidence rating of 5 neuroradiologists in the discrimination between tumor and pseudotumor in 28 test-cases, before and after having available spectroscopic information

Step 1: Evaluation with MR Imaging Alone	Step 2: Evaluation with MR Imaging and MR Spectroscopy
Step 1: Evaluation with MR Imaging Alone	0^*	1^*	2^*	3^*	4^*	TOTAL
0^*	3	2	3	1	0	9
1^*	4	4	4	13	0	25
2^*	0	2	0	10	1	13
3^*	0	1	8	11	27	47
4^*	0	0	0	1	45	46
TOTAL	7	9	15	36	73	140

Note:—The numbers in the table represent the number of times that each combination of scores was given by participating neuroradiologists.
* Modified scores: 0, quite certainly the wrong diagnosis; 1, probably the wrong diagnosis; 2, equivocal; 3, probably the right diagnosis; and 4, quite certainly the right diagnosis.