3.0 Tesla 乳腺MRIにおける拡散強調画像のb値によるコントラストおよびADCへの影響 Influence of b Value on the Measurement of Contrast and Apparent Diffusion Coefficient in 3.0 Tesla Breast Magnetic Resonance Imaging

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著者

    • 林 則夫 HAYASHI Norio
    • 金沢大学附属病院放射線部 Department of Radiological Technology, Kanazawa University Hospital
    • 宮地 利明 [他] MIYATI Tosiaki
    • 金沢大学医薬保健学域保健学類 School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University
    • 川島 博子 KAWASHIMA Hiroko
    • 金沢大学医薬保健学域保健学類 School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University
    • 大野 直樹 OHNO Naoki
    • 金沢大学附属病院放射線部 Department of Radiological Technology, Kanazawa University Hospital
    • 真田 茂 SANADA Shigeru
    • 金沢大学医薬保健学域保健学類 School of Health Sciences, College of Medical, Pharmaceutical and Health Sciences, Kanazawa University
    • 松井 修 MATSUI Osamu
    • 金沢大学大学院医学系研究科経血管学診療学 Department of Radiology, Kanazawa University Graduate School of Medical Science

抄録

Diffusion-weighted imaging (DWI) has been used to characterize not only the brain, but also the breast by implementation of faster imaging techniques and higher magnetic field strengths. However, the optimum <i>b</i> value, which is an important scan parameter for DW images contrast on 3 T breast magnetic resonance imaging (MRI) has not been established. The purpose of this study was to investigate the influence of different <i>b</i> value combinations on the image contrast and apparent diffusion coefficient (ADC) in patients with known invasive carcinoma, ductal carcinoma in situ (DCIS), and normal mammary gland in breast DWI. The analysis procedure consisted of the following methods: 1) T<sub>2</sub> correction of DW images with echo-planar imaging (EPI) T<sub>2</sub>-weighted images; 2) contrast measurement between normal mammary gland and tumor tissues; 3) ADC measurement of normal mammary gland and tumor tissues. In many cases, the highest contrast between normal mammary gland and tumor tissues was obtained using a <i>b</i> value of 1500 s/mm<sup>2</sup>. Our results indicated that when only one <i>b</i> value is used, the <i>b</i> value in which signal intensities of normal mammary gland decreases down to noise level, and the contrast between normal mammary gland and tumor tissues is recommended. ADC value decreased with increasing <i>b</i> value. Therefore, when determining the ADC threshold level, it is important to perform the evaluation using ADC values calculated from DW images with the same <i>b</i> value in clinical studies.

収録刊行物

  • 日本放射線技術學會雜誌

    日本放射線技術學會雜誌 68(3), 201-208, 2012-03-20

    公益社団法人 日本放射線技術学会

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各種コード

  • NII論文ID(NAID)
    10030139193
  • NII書誌ID(NCID)
    AN00197784
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03694305
  • NDL 記事登録ID
    023639939
  • NDL 請求記号
    Z19-205
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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