| take a series of x-rays | 0.53 |
| use small amounts of ra… | 0.37 |
| look at anatomical stru… | 0.25 |
| use computer | 0.25 |
| use ionizing radiation | 0.21 |
| increase cancer risk | 0.16 |
| x-ray procedures | 0.30 |
| test | 0.25 |
| performed | 0.72 |
| performed on abdomen | 0.35 |
| performed in 2007 | 0.34 |
| done at same time | 0.33 |
| performed in the united… | 0.30 |
| ordered | 0.30 |
| completed | 0.29 |
| used to measure the tum… | 0.25 |
| estimated to produce no… | 0.25 |