Diffusion tensor MRI of the kidney at 3.0 and 1.5 Tesla

Aki Kido, Masako Kataoka, Akira Yamamoto, Yuji Nakamoto, Shigeaki Umeoka, Takashi Koyama, Yoji Maetani, Hiroyuki Isoda, Ken Tamai, Nobuko Morisawa, Tsuneo Saga, Susumu Mori, Kaori Togashi

Research output: Contribution to journalArticlepeer-review


Background: Diffusion tensor imaging (DTI) at 3 T provides information on the microstructure and pathophysiology of tissues that is not available from conventional imaging with an advantage of high signal to noise ratio (SNR). Purpose: To evaluate the feasibility of DTI of the normal kidney at 3.0 T compared to results obtained at 1.5 T. Material and Methods: DTI of the normal kidney of 15 healthy volunteers obtained with 3.0 and 1.5 T scanners using respiration-triggered acquisition was examined. Fractional anisotropy (FA) and apparent diffusion coefficient (ADC) values of both the renal cortex and the medulla and SNRs were measured (b-values 0 and 400 s/mm2, diffusion direction of 6). The image quality of FA and ADC maps was also compared subjectively. Results: The FA values of the renal cortex were 0.15 ± 0.03 at 3.0 T and 0.14± 0.03 at 1.5 T on average. This difference was not significant. The FA values of the renal medulla were 0.49 ±0.04 at 3.0 T and 0.42 ± 0.05 at 1.5 T. ADC values of the renal cortex were 2.46 × 10-3± 0.09 mm2/s at 3.0 T and 2.20 ×10-3±0.11 mm2/s at 1.5 T. The ADC values of the renal medulla were 2.08 × 10-3 ± 0.08 mm 2/s at 3.0 T and 1.90 × 10-3± 0.11 mm 2/s at 1.5 T. These FA and ADC values were consistent with previous publications. The difference was significant for the FA value of the medulla (P < 0.01) and ADC values in both cortex and medulla (P < 0.01). The subjective image quality of the FA map with the 3.0 T scanner was significantly superior to that with the 1.5 T scanner (P < 0.01), but not significant for the ADC map (P 0.18). There was a significant difference in SNR between 3.0 T (48.8 ± 6.6) and 1.5 T images (32.8 ± 5.0). Conclusion: The feasibility of renal DTI with a 3.0 T magnet resulting in improved SNR was demonstrated.

Original languageEnglish (US)
Pages (from-to)1059-1063
Number of pages5
JournalActa Radiologica
Issue number9
StatePublished - Nov 2010


  • Apparent diffusion coefficient
  • Fractional anisotropy
  • High-field MRI

ASJC Scopus subject areas

  • Radiological and Ultrasound Technology
  • Radiology Nuclear Medicine and imaging


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