Table 1.
Tissue type and mean ± standard deviation apparent diffusion coefficient (ADC) values by using different b value combinations before and after the gadolinium based contrast agent administration (G-CA).
| b Value Protocol | Tissue type | |||||||
|---|---|---|---|---|---|---|---|---|
| Lesion (N = 32) | Fibroglandular tissue (N = 32) | |||||||
| Pre-G-CA ADC (x 10−3 mm2/s) | Post-G-CA ADC (x 10−3 mm2/s) | Mean change (%) | r/P | Pre-G-CA ADC (x 10−3 mm2/s) | Post-G-CA ADC (x 10−3 mm2/s) | Mean change (%) | r/P | |
| ADC0,200,400,600,800 | 1.05 ± 0.35 | 1.03 ± 0.36 | −1.58 ± 4.55 | 0.984/0.042 | 1.49 ± 0.28 | 1.48 ± 0.28 | −0.42 ± 4.47 | 0.950/ns. |
| ADC400,600,800 | 0.87 ± 0.30 | 0.88 ± 0.36 | 0.87 ± 13.7 | 0.930/ns. | 1.25 ± 0.31 | 1.28 ± 0.30 | 2.22 ± 12.23 | 0.876/ns. |
| ADC0,200,400 | 1.25 ± 0.42 | 1.20 ± 0.35 | −2.15 ± 8.07 | 0.968/0.016 | 1.73 ± 0.26 | 1.70 ± 0.26 | −1.51 ± 4.81 | 0.956/ns. |
| ADC0,200,800 | 1.03 ± 0.35 | 1.02 ± 0.35 | −1.55 ± 4.86 | 0.980/ns. | 1.46 ± 0.28 | 1.46 ± 0.28 | −0.24 ± 4.53 | 0.956/ns. |
| ADC0,400,800 | 1.06 ± 0.35 | 1.04 ± 0.35 | −1.46 ± 4.91 | 0.979/ns. | 1.49 ± 0.28 | 1.48 ± 0.27 | −0.24 ± 4.43 | 0.958/ns. |
| ADC0,200 | 1.38 ± 0.45 | 1.35 ± 0.44 | −0.70 ± 8.93 | 0.951/ns. | 1.86 ± 0.26 | 1.86 ± 0.27 | −0.01 ± 7.08 | 0.910/ns. |
| ADC0,800 | 1.06 ± 0.35 | 1.04 ± 0.35 | −1.46 ± 4.90 | 0.979/ns. | 1.49 ± 0.28 | 1.48 ± 0.27 | −0.24 ± 4.43 | 0.955/ns. |
| ADC200,800 | 0.83 ± 0.28 | 0.80 ± 0.33 | −2.53 ± 23.1 | 0.902/ns. | 1.17 ± 0.30 | 1.20 ± 0.30 | 3.72 ± 9.84 | 0.895/0.05 |
ADC = Apparent Diffusion Coefficient; G-CA = gadolinium based intravenous contrast agent; Pre-G-CA = measurement before the intravenously administered contrast agent; Post-G-CA = measurement after the intravenously administered contrast agent.