"Motion tracking type radiation irradiation technology"

Radiotherapy equipment shed with high precision proton beam chasing the movement of cancer of the organ was completed in Hokkaido University Hospital , the 17th , it has been published . By easier to perform radiation therapy to cancer, such as lung or liver which moves in accordance with the breathing , the use of proton beam that is easy to limit the scope to issue a radiation compared to X-ray , that can be effective in patients with childhood cancer it can be expected that treatment .
Radiation therapy is one of the cancer therapy , 's choice alongside surgery , chemotherapy , but has been limited to organs fixing of the affected head and neck , and prostate is likely to rely on the radiation is easily in the past.
Hitachi to apply a proton beam with a precision of the world 's first developed around the clay professor of Hokkaido University as " motion tracking type radiation technology" , high along the form tumors ( tumors) therapy device , " the spot scanning irradiation technology the combination of a " . The proton beam only when it is embedded marker of gold of about 2 mm up to ( mark ) in the vicinity of cancer , while specific shooting 30 frames per second the motion in the two cameras , the mark has come to the position that you planned to irradiation . We hope that they come to be adapted to many patients .


臓器のがんの動きを追いかけて陽子線を精度よく当てる放射線治療装置が北海道大病院に完成し、１７日、公開された。呼吸に合わせて動く肺や肝臓などのがんにも放射線治療を行いやすく、Ｘ線に比べて放射線を出す範囲を限定しやすい陽子線を使うことで、小児がんの患者にも効果的な治療が期待できるという。
　がん治療法の一つである放射線治療は、外科手術、化学療法と並ぶ選択肢だが、従来は頭や首、前立腺など患部の固定がしやすく放射線を当てやすい臓器に限られていた。
　治療装置は、北大の白土教授を中心に開発した世界初の「動体追跡型放射線照射技術」と、腫瘍（しゅよう）の形に沿って高い精度で陽子線をあてる日立製作所の「スポットスキャニング照射技術」を組み合わせたもの。がんの近くに最大２ミリほどの金のマーカー（目印）を埋め込み、２台のカメラでその動きを毎秒３０コマの撮影で特定しながら、計画した位置に目印が来たときだけ陽子線を照射する。多くの患者さんに適応されるようになるといいですね。