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Table 2 Number of CT scanners in Gunma prefecture and data collection.

From: Radiation Exposure from CT Examinations in Japan

  Number of CT scanners Estimated annual number of patients
  Total Data obtained (%)    
   Complete data Scanning protocol & Number of patients * Mean Range Estimated total number
Hospitals 132 63 61 2,571 36 - 23,616 339,393
Clinics 94 ** 6 0 1,406 288 - 2,664 132,164
Total 226 69 61    471,557
  1. * No individual patients' data were provided.
  2. ** Data requests sent to 14 randomly-selected clinics.