Table 1 Comparison of signal intensities of different solution concentrations of gadolinium-based contrast agents with or without addition of synovial fluid and their reproducibility
Gd-BOPTA 0.5 mmol/l | Gd-BOPTA 0.67 mmol/l | Gd-BOPTA 1 mmol/l | Gd-BOPTA 2 mmol/l | Gd-BOPTA 4 mmol/l | Gd-DTPA 2 mmol/l | Saline | |||
|---|---|---|---|---|---|---|---|---|---|
0.5 ml of synovial fluid | Set #1 | Scan #1 | 1241 ± 19 | 1481 ± 50 | 1583 ± 34 | 1521 ± 29 | 1414 ± 34 | 1204 ± 59 | 403 ± 6 |
Scan #2 | 1247 ± 13 | 1464 ± 60 | 1577 ± 35 | 1514 ± 26 | 1416 ± 37 | 1234 ± 47 | 403 ± 6 | ||
Coefficient of repeatability | 97% | 90% | 95% | 95% | 94% | 89% | 96% | ||
Set #2 | Scan #1 | 1241 ± 8 | 1497 ± 49 | 1602 ± 52 | 1534 ± 39 | 1424 ± 37 | 1253 ± 50 | 391 ± 11 | |
Scan #2 | 1241 ± 7 | 1461 ± 62 | 1604 ± 34 | 1542 ± 32 | 1419 ± 36 | 1238 ± 61 | 398 ± 16 | ||
Coefficient of repeatability | 99% | 90% | 93% | 94% | 93% | 87% | 91% | ||
Set #3 | Scan #1 | 1249 ± 13 | 1474 ± 45 | 1608 ± 37 | 1536 ± 35 | 1410 ± 32 | 1253 ± 37 | 398 ± 9 | |
Scan #2 | 1244 ± 21 | 1442 ± 54 | 1596 ± 34 | 1527 ± 29 | 1415 ± 32 | 1234 ± 40 | 400 ± 7 | ||
Coefficient of repeatability | 99% | 90% | 93% | 94% | 93% | 87% | 91% | ||
Set #4 | Scan #1 | 1236 ± 8 | 1486 ± 61 | 1610 ± 44 | 1524 ± 32 | 1406 ± 38 | 1232 ± 46 | 409 ± 8 | |
Scan #2 | 1243 ± 17 | 1470 ± 46 | 1584 ± 37 | 1521 ± 32 | 1408 ± 28 | 1239 ± 53 | 409 ± 7 | ||
Coefficient of repeatability | 96% | 90% | 94% | 93% | 94% | 90% | 94% | ||
Set #5 | Scan #1 | 1246 ± 19 | 1496 ± 49 | 1601 ± 38 | 1540 ± 26 | 1411 ± 34 | 1266 ± 55 | 404 ± 6 | |
Scan #2 | 1240 ± 14 | 1484 ± 44 | 1601 ± 27 | 1545 ± 27 | 1405 ± 33 | 1246 ± 46 | 403 ± 10 | ||
Coefficient of repeatability | 96% | 91% | 95% | 95% | 93% | 91% | 95% | ||
Differences between sets | 0.714 | 0.285 | 0.213 | 0.013 | 0.411 | 0.165 | 0.000 | ||
No synovial fluid | Set #6 | Scan #1 | 1184 ± 29 | 1441 ± 49 | 1530 ± 38 | 1478 ± 39 | 1347 ± 39 | 1292 ± 45 | 401 ± 5 |
Scan #2 | 1191 ± 31 | 1383 ± 58 | 1520 ± 36 | 1454 ± 34 | 1358 ± 35 | 1257 ± 62 | 387 ± 10 | ||
Coefficient of repeatability | 94% | 86% | 93% | 93% | 94% | 89% | 92% | ||