Table 2 Image quality evaluation of APTw images
Image scores | Scale of marks | Reader 1 | Reader 2 | Reader 3 |
|---|---|---|---|---|
5 | Good image quality with tumor detectable and lesion contour clearly delineated on APTw images | n = 6 | n = 5 | n = 6 |
4 | Tumor lesion could be recognized on APTw images, but contour was not so well delineated, reference information on conventional MR images needed for region of interest (ROI) analysis | n = 17 | n = 20 | n = 18 |
3 | Tumor undetectable without reference to conventional MR images | n = 12 | n = 10 | n = 11 |
2 | Poor APTw image quality with obvious artifacts, although the tumor lesion was revealed on conventional MR images | n = 12 | n = 11 | n = 10 |
1 | No lesions were identified on APTw or any conventional MR images | n = 2 | n = 3 | n = 4 |