Table 2.
Fréchet Inception Distance between different sets of images.
| CycleGAN Dataset | View | Real BI-RADS D (lower bound) | Synthetic BI-RADS D (input BI-RADS A from OPTIMAM Hologic) | Synthetic BI-RADS D (input BI-RADS A from INbreast) | Real BI-RADS A (upper bound) | |
|---|---|---|---|---|---|---|
| Real BI-RADS D | BCDR | CC + MLO | 66.16 | 149.10 (BC-All) | 103.98 (BC-All) | 142.61 |
| CSAW | CC | 42.57 | 99.95 (CS-CC) | 124.84 (CS-CC) | 142.34 | |
| MLO | 73.54 | 165.48 (CS-MLO) | 183.89 (CS-MLO) | 206.04 | ||
| OPTIMAM Hologic |
CC | 34.17 | 73.16 (OP-CC) | 132.04 (OP-CC) | 107.99 | |
| MLO | 57.24 | 109.68 (OP-MLO) | 175.63 (OP-MLO) | 140.93 |
The lower bound was defined as the FID between two different splits of real BI-RADS D mammograms from the same CycleGAN dataset. Similarly, the upper bound was given by the FID between real BI-RADS A and BI-RADS D mammograms. The synthetic BI-RADS D images were generated from real BI-RADS A mammograms from OPTIMAM Hologic and INbreast datasets. The different CycleGAN models (BC-All, CS-CC, CS-MLO, OP-CC and OP-MLO) were used to generate the synthetic images. Bold values indicates the FID values from the synthetic images.