Current radiologist workload and the shortages in Japan: how many full-time radiologists are required?

Akihiro Nishie, Daisuke Kakihara, Takeshi Nojo, Katsumasa Nakamura, Sachio Kuribayashi, Masumi Kadoya, Kuni Ohtomo, Kazuro Sugimura, Hiroshi Honda

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Purpose: To clarify the workload of certified radiologists and to estimate the current manpower shortages in Japan. Methods: We conducted a questionnaire survey for accredited training institutions. The contents included the radiologist employment pattern (full vs. part time), the number of computed tomography (CT) and magnetic resonance imaging (MRI) examinations and their radiology reports, the number of radiation therapy planning sessions, and the time per week spent for each work activity. We also used the hospital survey reports of Japan’s Ministry of Health, Labor, and Welfare in our analyses. Results: The estimated numbers of CT and MRI interpretation reports and radiation treatment plans that one full-time radiologist could complete within 1 hospital day (8 h) were 19.9 and 1.22, respectively. To complete all CT and MRI reports, at least 2.09 times more full-time diagnostic radiologists are needed in Japan. For radiation therapy, at least 1.23 times more full-time radiation oncologists are necessary at large- and medium-scale hospitals, although the number of radiation oncologists needed in Japan is balanced to the current number. Conclusion: The number of full-time certified diagnostic radiologists for CT and MRI interpretation in Japan is insufficient. Centralized radiation therapy facilities may be more efficient for meeting the increasing demand.

Original languageEnglish
Pages (from-to)266-272
Number of pages7
JournalJapanese Journal of Radiology
Issue number5
Publication statusPublished - May 18 2015

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging


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