Utility of Apparent Diffusion Coefficients in the Evaluation of Solid Renal Tumors at 3T
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- SASAMORI Hiroto
- Department of Radiology, School of Medicine, Showa University
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- SAIKI Makoto
- Department of Radiology, School of Medicine, Showa University
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- SUYAMA Jumpei
- Department of Radiology, School of Medicine, Showa University
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- OHGIYA Yoshimitsu
- Department of Radiology, School of Medicine, Showa University
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- HIROSE Masanori
- Department of Radiology, School of Medicine, Showa University
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- GOKAN Takehiko
- Department of Radiology, School of Medicine, Showa University
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抄録
Purpose: We assessed the usefulness of apparent diffusion coefficients (ADCs) for solid renal tumor imaging using diffusion-weighted magnetic resonance imaging (DWI) at 3T.Methods: This retrospective study assessed ADCs of 31 patients with renal tumors that were imaged using preoperative DWI. DWI was performed with the b values of 50, 500, and 1000 s/mm2, using a 3T magnetic resonance imaging (MRI) system (MAGNETOM Trio, 3T, Siemens Healthcare, Erlangen, Germany). The ADC map was calculated using the b values of 50 and 1000 s/mm2. ADCs of the different tumors were compared according to the Tukey–Kramer test.Results: The tumors were diagnosed as clear cell renal cell carcinoma (RCC; n = 20), papillary RCC (n = 1), infiltrating urothelial carcinoma (UC) of the kidney (n = 4), cystic RCC (n = 1), poorly differentiated carcinoma (n = 1), and angiomyolipoma (AML; n = 4). The mean ADC of clear cell RCC was significantly higher than that of infiltrating UC of the kidney (1.423 vs. 0.931 × 10−3 mm2/s; P < 0.05), and the mean ADC of AML was significantly lower than that of clear cell RCC (0.674 vs. 1.423 × 10−3 mm2/s; P < 0.01).Conclusion: ADCs used in DWI at 3T may be useful for differentiation of different types of solid renal tumors.
収録刊行物
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- Magnetic Resonance in Medical Sciences
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Magnetic Resonance in Medical Sciences 13 (2), 89-95, 2014
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