| Japanese |
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| Title | 腎の深さ算出のための新しい回帰式の提案 - とくにカメラ法による99mTc-MAG3腎動態シンチグラフィ定量測定の精度向上に向けて - |
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| Subtitle | 《原著》 |
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| Authors | 内山勝弘*, 國安芳夫*, 新尾泰男*, 長谷部伸*, 山田盛久*, 篠原広行*, 松岡伸*, 島英樹*, 大渕真男*, 滝沢謙治*, 本田実*, 川辺竜司*, 桑山潤*, 岩崎滋樹**, 出浦照國** |
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| Authors(kana) | |
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| Organization | *昭和大学藤が丘病院放射線科, **昭和大学藤が丘病院腎臓内科 |
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| Journal | 核医学 |
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| Volume | 34 |
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| Number | 3 |
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| Page | 159-166 |
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| Year/Month | 1997/3 |
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| Article | 原著 |
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| Publisher | 日本核医学会 |
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| Abstract | 「要旨」腎疾患の合併のない成人1,170例に対するX線CTでの腎の深さ計測値をもとに, 腎の深さ算出のための新しい回帰式の作成を試みた. X線CTにて計測された右腎の深さ(Dr)は7.33±1.27cm, 左腎の深さ(Dl)は7.07±1.27cmで, 従来のTφnnesen法, 三重大の伊藤法, 北大の伊藤法およびTaylor法での算出値と比べ25〜10%の隔たりがみられた. X線CTで計測された腎の深さ値と最もよい相関関係を示した因子である腹厚(Ta)による腎の深さの算出式はDr=0.32×Ta+0.87, Dl=0.36×Ta-0.08であった. この回帰式での腎の深さ算出値は, X線CTでの計測値と差が少なく, カメラ法での99mTc-MAG3シンチグラフィ腎機能定量法の精度の向上を目指す腎の深さ補正に広く応用されるものである. |
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| Practice | 臨床医学：一般 |
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| Keywords | 99mTc-MAG3 renal scintigraphy, 99mTc-MAG3 clearance, Camera-based clearance, Renal depth correction. |
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| English |
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| Title | Proposal on New Formulas for Renal Depth in the Technetium-99m-Mercaptoacetyltriglycine (MAG3) Scintigraphy |
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| Subtitle | - Original Articles - |
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| Authors | Katsuhiro UCHIYAMA*, Yoshio KUNIYASU*, Yasuo NIIO*, Shin HASEBE*, Morihisa YAMADA*, Hiroyuki SHINOHARA*, Shin MATSUOKA*, Hideki SHIMA*, Masao OBUCHI*, Kenji TAKIZAWA*, Minoru HONDA*, Ryuji KAWABE*, Jun KUWAYAMA*, Shigeki IWASAKI**, Terukuni IDEURA** |
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| Authors(kana) | |
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| Organization | *Department of Radiology, **Department of Internal Medicine, Fujigaoka Hospital of Showa University |
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| Journal | The Japanese Journal of nuclear medicine |
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| Volume | 34 |
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| Number | 3 |
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| Page | 159-166 |
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| Year/Month | 1997/3 |
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| Article | Original article |
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| Publisher | THE JAPANESE SOCIETY OF NUCLEAR MEDICINE |
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| Abstract | Recently, camera-based techniques to measure effective renal plasma flow (ERPF) have become more popular than single plasma sample techniques because camera-based measurements avoid the necessity of delayed plasma samples and in vitro techniques. The measurements of ERPF are used to estimate the clearance of technetium-99m-mercaptoacetyltriglycine (MAG3). However, camera-based techniques are dependent on an accurate estimate of renal depth to correct for soft-tissue attenuation. Then, new formulas for renal depth correction of technetium-99m-MAG3 clearance in place of Tφnnesen's, M.Ito's, K.Itoh's, and Taylor's methods were tried to establish in this paper. Patients and methods: Eleven hundred and seventy patients without any renal disease were objected. The data from measurement of renal depth using X-ray CT in supine position were analyzed statistically. Results: The depths of right kidney (Dr) and left kidney (Dl) were 7.33+-1.27 and 7.07+-1.27 cm. The correlation coefficients between Dr and height (H), body weight (W), body surface area (BSA: W0.425×H0.725×0.007184 m2), age, and abdominal thickness (Ta) were 0.275, 0.709, 0.615, 0.087, and 0.743. The correlation coefficients between Dl and H, W, BSA, age, and Ta were 0.269, 0.732, 0.629, 0.029, and 0.812. Ta had best correlation with both Dr and Dl. The calculation formulas for Dr and Dl using Ta were as follows; Dr=0.32×Ta+0.87 cm, and Dl=0.36×Ta-0.08 cm. On the other hand, the multiplex calculation formulas of Dr or Dl with H, W, and Ta were as follows; Dr=0.18Ta+8.54×(W/H)+0.75 (r=0.768), and Dl=0.26Ta+5.90×(W/H)-0.16 (r=0.823). Conclusion: The new regression equations provide superior estimates of renal depth compared to conventional equations. Application of these new formulas into camera-based protocols to determine renal clearances may lead to more accurate measurements of ERPF using technetium-99m-MAG3 scintigraphy. |
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| Practice | Clinical medicine |
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| Keywords | 99mTc-MAG3 renal scintigraphy, 99mTc-MAG3 clearance, Camera-based clearance, Renal depth correction. |
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