東日本大震災の被災地宮城県におけるMR装置被害の実態調査報告

摘要

A questionnaire comprising 14 items, inquiring about the state of damage, whether safety could be ensured, and progress of repair and restoration was distributed to 984 facilities in seven prefectures on the Pacific coast as part of a fact-finding survey of damage caused to magnetic resonance (MR) devices by the Great East Japan Earthquake. In all, 458 responses (46.6%) were collected. In Miyagi Prefecture alone, 65 responses from 105 questionnaires were collected (response rate: 61.9%). The overall incidence of damage was 19.2%, with 57 facilities (12.4%) reporting that displacement of the magnets was the most common problem. The damage event rate in Miyagi Prefecture was 51.3%, with displacement of the magnet being highest at 17 cases (26.2%). There was a high rate of 13 cases (26.5%) of chiller and air conditioning failures and a rapid loss of He in ten MR scanners (20.4%). Notably, 87.8% of facilities in Miyagi Prefecture (24.5% of the total) were affected by earthquakes exceeding 6 on the Japanese Seismic Intensity Scale. Flood damage caused by the tsunami was also seen along the Sanriku coast to Sendai City (six MR scanners, 50% of the total), and was typical of the damage seen in Miyagi Prefecture.%2011年3月11日に発生した東日本大震災は，広域で激しい揺れと津波被害が特徴とされ未曽有の大災害となった．医療施設への被害も甚大で，多くの医療機器に被害が及んだ．放射線機器装置の被害状況については，宮城県放射線技師会が放射線機器装置販売・サービス会社を対象に宮城県内の被害アンケート調査を実施し，各社が実施した点検修理（全損壊含む）は約2,700件，被害総額は概算37億円強に及んだことが判明た．