Time-dependent Diffusion in Brain Abscesses Investigated with Oscillating-gradient Spin-echo

Tomoko Maekawa; Masaaki Hori; Katsutoshi Murata; Thorsten Feiweier; Kouhei Kamiya; Christina Andica; Akifumi Hagiwara; Shohei Fujita; Koji Kamagata; Akihiko Wada; Osamu Abe; Shigeki Aoki

doi:10.2463/mrms.ici.2021-0083

INNOVATIVE CLINICAL IMAGE

Time-dependent Diffusion in Brain Abscesses Investigated with Oscillating-gradient Spin-echo

Tomoko Maekawa, Masaaki Hori, Katsutoshi Murata, Thorsten Feiweier, Kouhei Kamiya, Christina Andica, Akifumi Hagiwara, Shohei Fujita, Koji Kamagata, Akihiko Wada, Osamu Abe, Shigeki Aoki

Author information

Tomoko Maekawa
Department of Radiology, Juntendo University School of Medicine
Masaaki Hori
Department of Radiology, Juntendo University School of Medicine
Department of Diagnostic Radiology Toho University Omori Medical Center
Katsutoshi Murata
Siemens Healthcare Japan KK
Thorsten Feiweier
Siemens Healthcare GmbH
Kouhei Kamiya
Department of Radiology, Juntendo University School of Medicine
Department of Diagnostic Radiology Toho University Omori Medical Center
Christina Andica
Department of Radiology, Juntendo University School of Medicine
Akifumi Hagiwara
Department of Radiology, Juntendo University School of Medicine
Shohei Fujita
Department of Radiology, Juntendo University School of Medicine
Department of Radiology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo
Koji Kamagata
Department of Radiology, Juntendo University School of Medicine
Akihiko Wada
Department of Radiology, Juntendo University School of Medicine
Osamu Abe
Department of Radiology, Graduate School of Medicine and Faculty of Medicine, The University of Tokyo
Shigeki Aoki
Department of Radiology, Juntendo University School of Medicine

Keywords: brain abscess, diffusion-weighted imaging, diffusion time, microstructure, oscillating-gradient spin-echo

JOURNAL OPEN ACCESS

2022 Volume 21 Issue 4 Pages 525-530

DOI https://doi.org/10.2463/mrms.ici.2021-0083

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Abstract

Oscillating-gradient spin-echo sequences enable the measurement of diffusion weighting with a short diffusion time and can provide indications of internal structures. We report two cases of brain abscess in which the apparent diffusion coefficient (ADC) values appear higher at short diffusion times in comparison with those at long diffusion times. Diffusion time dependence of the ADC in brain abscesses suggests not only substrate viscosity but also restricted diffusion due to the structure within the lesions.

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