Table II. Differential diagnoses by CT and MRI.
| Equal diagnoses |
Fewer (diagnoses) |
More (diagnoses) |
|||||
|---|---|---|---|---|---|---|---|
| Parameter | Number | (%) | Number | (%) | Number | (%) | Total |
| MRI 1 vs CT 1 | 5 | 12 | 12 | 29 | 24 | 59 | 41 |
| MRI 1 vs CT 2 | 13 | 32 | 9 | 22 | 19 | 46 | 41 |
| MRI 2 vs CT 1 | 14 | 34 | 20 | 49 | 7 | 17 | 41 |
| MRI 2 vs CT 2 | 19 | 46 | 11 | 27 | 11 | 27 | 41 |
| Average | 31 | 31.75 | 37.25 | ||||
For the 41 lesions not characterized by MRI, MRI narrowed the differential diagnosis relative to CT in 31.75% of the lesions, increased the differential diagnosis in 37.25%, and did not change the differential diagnosis in 31% of the lesions.