Table 2.
Four MR scanning parameters were used to visually compare the selected material's contrast between water. Among the parameters, a T1‐weighted and T2‐weighted sequences were scanned based off of the assumption that other MRgRT systems would have the capability to image basic T1‐weighted and T2‐weighted protocols. A TRUFI sequence was scanned to ensure that the materials could be visualized on ViewRay systems. Since FLAIR sequences are commonly used to enhanced lesions in the clinic, a FLAIR sequence was also used to compare the selected material's contrast
| Scanning sequence | T1‐weighted gradient | TRUFI | T2‐weighted gradient | FLAIR |
|---|---|---|---|---|
| FA | 25° | 70° | 120° | 120° |
| TR (ms) | 9.5 | 4 | 3200 | 5000 |
| TE (ms) | 4.68 | 2 | 245 | 336 |
| ETL | 1 | 1 | 109 | 109 |
| NEX | 1 | 1 | 2 | 2 |