The distribution of first authors, degrees, institutions, funding, and fields across time
| 1998 | 2003 | 2008 | 2013 | 2018 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Count | % | Count | % | Count | % | Count | % | Count | % | |
| Radiologist vs nonradiologist | ||||||||||
| Radiologists | 48 | 80.0% | 55 | 83.3% | 52 | 76.4% | 56 | 66.7% | 69 | 77.5% |
| Nonradiologists | 12 | 20.0% | 11 | 16.7% | 16 | 23.6% | 28 | 33.3% | 20 | 22.5% |
| Degree | ||||||||||
| Both MD and PhD | 1 | 1.7% | 4 | 6.2% | 5 | 8.6% | 9 | 11.3% | 16 | 18.0% |
| MD | 56 | 96.6% | 56 | 86.2% | 47 | 81.0% | 58 | 72.5% | 64 | 72.0% |
| PhD | 2 | 3.4% | 5 | 7.6% | 6 | 10.4% | 10 | 12.5% | 8 | 8.9% |
| Master of Science | 0 | 0.0% | 0 | 0.0% | 0 | 0.0% | 3 | 3.7% | 1 | 1.1% |
| Institution | ||||||||||
| Multiple institutions | 17 | 28.3% | 15 | 22.7% | 19 | 27.9% | 43 | 51.2% | 51 | 34.5% |
| Single institution | 43 | 71.7% | 51 | 77.3% | 49 | 72.1% | 41 | 48.8% | 38 | 65.5% |
| Funding | ||||||||||
| Funded | 12 | 20.0% | 14 | 21.2% | 17 | 25.0% | 39 | 46.4% | 33 | 37.1% |
| Unfunded | 48 | 80.0% | 52 | 78.8% | 51 | 75.0% | 45 | 53.6% | 56 | 62.9% |
| Field | ||||||||||
| Brain | 13 | 21.7% | 26 | 39.4% | 30 | 44.8% | 28 | 33.7% | 33 | 39.8% |
| Head and Neck | 24 | 40.0% | 7 | 10.7% | 9 | 13.4% | 14 | 16.9% | 13 | 15.7% |
| IR-Vascular | 16 | 26.7% | 14 | 21.2% | 19 | 28.4% | 25 | 30.1% | 22 | 26.5% |
| Peds | 6 | 10.0% | 13 | 19.7% | 2 | 3.0% | 10 | 12.0% | 5 | 6.0% |
| PNS-Spine | 1 | 1.6% | 6 | 9.0% | 7 | 10.4% | 6 | 7.3% | 10 | 12.0% |
Note:—IR indicates interventional radiology; PNS, peripheral nervous system.