拡散強調画像における測定対象周囲の環境変化がみかけの拡散係数に与える影響

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タイトル別名
  • The Effect of the Surroundings to the Apparent Diffusion Coefficient on Diffusion Weighted Imaging
  • カクサン キョウチョウ ガゾウ ニ オケル ソクテイ タイショウ シュウイ ノ カンキョウ ヘンカ ガ ミカケ ノ カクサン ケイスウ ニ アタエル エイキョウ

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抄録

Diffusion weighted imaging (DWI) is now widely used in magnetic resonance (MR) imaging of the head and body. Moreover, the Apparent diffusion coefficient (ADC) value is often used for the differential diagnosis of the tumor. However, the effect of the surroundings on the ADC value has not been reported. In this study, we used the phantom completely sealed up to measure the change in the ADC value depending on the surroundings material. The results showed that the ADC value decreased according to the density of superparamagnetic iron oxide (SPIO) in the surroundings. Clinically, hemorrhage or iron deposit around the tumor may affect the ADC value of the tumor and result in under-estimation.

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