<sup>99m</sup>Tc-ECD非侵襲的脳血流定量法(Brain Uptake Ratio)における入力関数の最適ROI設定位置の決定

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タイトル別名
  • Determination of the Optimal ROI Setting Position of the Input Function for the <sup>99m</sup>Tc-ethyl Cysteinate Dimmer Brain Uptake Ratio Method
  • 臨床技術 99mTc-ECD非侵襲的脳血流定量法(Brain Uptake Ratio)における入力関数の最適ROI設定位置の決定
  • リンショウ ギジュツ 99mTc-ECD ヒシンシュウテキ ノウ ケツリュウ テイリョウホウ(Brain Uptake Ratio)ニ オケル ニュウリョク カンスウ ノ サイテキ ROI セッテイ イチ ノ ケッテイ
  • Determination of the Optimal ROI Setting Position of the Input Function for the 99mTc-ethyl Cysteinate Dimmer Brain Uptake Ratio Method

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Determination of the input function for the 99mTc-ethyl cysteinate dimmer brain uptake ratio (99mTc-ECD BUR) method as a non-invasive quantitative measurement of cerebral blood flow measurement is of critical importance in order to improve the accuracy of this method. The input functions were experimentally obtained by setting the regions of interest (ROIs) in the ascending aorta, aortic arch, and descending aorta on the 49 chest RI-angio images. rCBFs by the BUR method with 3 input functions of the 6 cases were compared with those by the 123I-iodoamphetamine (IMP) continuous arterial blood sampling method in order to determine the best location for the ROI of the input function. The input function of the ascending aorta was higher than those of the aortic arch and the descending aorta. The input functions of the aortic arch and the descending aorta decreased due to the origin of the three branches of the right brachiocephalic artery, left subclavian artery, and left common carotid artery. A good correlation was found in the regional cerebral blood flow (rCBF) values between the 123I-IMP continuous arterial blood sampling method and the 99mTc-ECD BUR method with the input function of the ascending aorta. Therefore, the ascending aorta is the best location for the ROI of the input function for the 99mTc-ECD BUR method.

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