Table 1.
Diagnostic Accuracy of Radiologists Following MRI Alone and MRS + MRS, and Spectroscopist Interpretation of MRS Alone and MRS + Differentials
| Number of Patients | Correct MRI Alone | Correct MRI + MRS | Correct MRS Alone | Correct MRS + Differentials | |
|---|---|---|---|---|---|
| Radiologists | Spectroscopist | ||||
| By Location (All Tumors) | |||||
| PF/BS | 29 | 80% | 88% | 78% | 78% |
| ST | 22 (18 analyzablea) | 62% | 68% | 59% (72% analyzablea) | 68% (83% analyzablea) |
| By Radiologist (All Tumors) | |||||
| Rad 1 | 51 | 73% | 78% | – | – |
| Rad 2 | 51 | 65% | 71% | – | – |
| Rad 3 | 51 | 71% | 83% | – | – |
| All Tumours | 51 (47 analyzable a) | 69% | 77% | 69% (75% analyzable a) | 75% (81% analyzable a) |
| Histopathology Only | |||||
| Tumours with Histopathological Diagnosis Only | 38 | 74% | 81% | 68% (72% analyzable a) | 73% (78% analyzable a) |
Abbreviations: MRS, 1H-magnetic resonance spectroscopy; PF, posterior fossa; ST, supratentorial; BS, brainstem.
aAnalyzable MRS: passed or borderline QC, or interpretable despite failing QC (n = 47).