5 Year Impact Factor & Ranking

8.0 6.0 4.0 2.0 6.724 2017 2018 2019 2020 2021 6.724 2017 2018 2019 2020 2021
  • 1 212
    #45
  • 1 126
    #14
  • 1 216
    #47
  • 1 125
    #15
  • 1 222
    #56
  • 1 126
    #18
  • 1 236
    #69
  • 1 133
    #17
  • 1 240
    #62
  • 1 133
    #18

About 5 Year Impact Factor & Ranking

Impact Factor based on 5 years of history. Copyright Clarivate Analytics.

Metrics

Year I.F. Oncology Radiology, nuclear medicine & medical imaging
2021 6.724 62/240 18/133
2020 5.881 69/236 17/133
2019 4.853 56/222 18/126
2018 5.119 47/216 15/125
2017 4.987 45/212 14/126

Definition

Impact Factor

A base of five years may be more appropriate for journals in certain fields because the body of citations may not be large enough to make reasonable comparisons, or it may take longer than two years to publish and distribute leading to a longer period before others cite the work.

Actual value is intentionally only displayed for the most recent year. Earlier values are available in the Journal Citation Reports from Clarivate Analytics.

ISI ranking

Journals are often ranked by Impact Factor in an appropriate Clarivate Analytics subject category. As there are now two Impact Factors published – two-year and five-year Impact Factors – this rank may differ, so care is needed when assessing these ranked lists to understand which of the two metrics is being used. In addition, journals can be categorized in multiple subject categories, giving them different ranks for each subject. Consequently, a rank should always be in context to the subject category.