Department of Radiological Technology, Radiological Diagnosis, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo, 104-0045, Japan.
Division of Diagnostic Radiology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi, Sunto, Shizuoka, 411-8777, Japan.
Radiol Phys Technol. 2023 Sep;16(3):355-365. doi: 10.1007/s12194-023-00725-2. Epub 2023 May 18.
This study aimed to discover the associations between the number of computed tomography (CT) scanners and the population, as well as number of medical resources to identify regional disparities in Japan. The number of CT scanners was tabulated for each detector row of CT scanners for hospitals and clinics in each prefecture. The number of CT scanners, patients, medical doctors, radiological technologists, facilities, and beds per 100,000 population was compared. Additionally, the number of hospitals with ≥ 200 beds and multidetector-row CT scanners with ≥ 64 rows were tabulated, and their ratios were calculated. Medical institutions in Japan have installed 14,595 scanners. CT scanners per 100,000 population were the highest in Kochi Prefecture, although the number of CT scanners in hospitals was the highest in Tokyo Prefecture. Multivariate analysis revealed the number of radiological technologists (β coefficient: 0.49; P = 0.03), facilities (β coefficient: 0.12; P < 0.01) and beds (β coefficient: 0.46; P < 0.01) as independent factors for the number of CT scanners. Prefectures with a high proportion of hospitals with ≥ 200 beds also had a relatively high proportion of CT scanners with ≥ 64 rows (P < 0.01). Our survey revealed an association between regional disparities in the number of CT scanners in Japan, the population, and number of medical resources. A positive correlation was found between hospital size and number of CT scanners with ≥ 64 rows.
本研究旨在探索日本各地区 CT 扫描仪数量与人口以及医疗资源数量之间的关系，以发现地域差异。我们对每个县的医院和诊所的每排 CT 扫描仪的 CT 扫描仪数量进行了列表统计。我们比较了每 10 万人拥有的 CT 扫描仪、患者、医生、放射技师、设施和床位数量。此外，我们还对拥有≥200 张床位的医院和拥有≥64 排探测器的多排 CT 扫描仪的数量进行了列表统计，并计算了它们的比例。日本的医疗机构共安装了 14595 台 CT 扫描仪。尽管东京都的医院 CT 扫描仪数量最高，但每 10 万人口的 CT 扫描仪数量最高的是高知县。多变量分析显示，放射技师数量（β系数：0.49；P=0.03）、设施数量（β系数：0.12；P<0.01）和床位数量（β系数：0.46；P<0.01）是 CT 扫描仪数量的独立影响因素。拥有大量≥200 张床位的医院的县，其≥64 排 CT 扫描仪的比例也相对较高（P<0.01）。我们的调查显示，日本 CT 扫描仪数量的地域差异与人口和医疗资源数量之间存在关联。医院规模与拥有≥64 排探测器的 CT 扫描仪数量之间存在正相关关系。
