دورية أكاديمية
Restricted diffusion characteristics in oscillating gradient spin echo with mesoscopic phantom
| العنوان: | Restricted diffusion characteristics in oscillating gradient spin echo with mesoscopic phantom |
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| المؤلفون: | Hinako Oshiro, Junichi Hata, Daisuke Nakashima, Rintaro Oshiro, Naoya Hayashi, Yawara Haga, Kei Hagiya, Daisuke Yoshimaru, Hideyuki Okano |
| المصدر: | Heliyon, Vol 10, Iss 4, Pp e26391- (2024) |
| بيانات النشر: | Elsevier, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Science (General) LCC:Social sciences (General) |
| مصطلحات موضوعية: | Diffusion spectrum, Mesoscopic phantom, B-value dependence, Oscillating gradient spin echo, Restricted diffusion, Diffusion MRI, Science (General), Q1-390, Social sciences (General), H1-99 |
| الوصف: | In diffusion magnetic resonance imaging, oscillating gradient spin echo (OGSE) has an extremely short diffusion time if motion probing gradient (MPG) is applied to the waveform. Further, it can detect microstructural specificity. OGSE changes sensitivity to spin displacement velocity based on the MPG phase. The current study aimed to investigate the restricted diffusion characteristics of each OGSE waveform using the capillary phantom with various b-values, frequencies, and MPG phases. We performed OGSE (b-value = 300, 500, 800, 1200, 1600, and 2000 s/mm2) for the sine and cosine waveforms using the capillary phantom (6, 12, 25, 50, and 100 μm and free water) with a 9.4-T experimental magnetic resonance imaging system and a solenoid coil. We evaluated the axial and radial diffusivity (AD, RD) of each structure size. The output current of the MPG was assessed with an oscilloscope and analyzed with the gradient modulation power spectra by fast Fourier transform.In sine, the sidelobe spectrum was enhanced with increasing frequency, and the central spectrum slightly increased. The difference in RD was detected at 6 and 12 μm; however, it did not depend on the structure scale at 50 or 100 μm and free water. In cosine, the diffusion spectrum was enhanced, whereas the central spectrum decreased with increasing frequency. Both AD and RD in cosine had a frequency dependence, and AD and RD increased with a higher frequency regardless of structure size. AD and RD in either sine or cosine had no evident b-value dependence. We evaluated the OGSE-restricted diffusion characteristics. The measurements obtained diffusion information similar to the pulsed gradient spin echo. Hence, the cosine measurements indicated that a higher frequency could capture faster diffusion within the diffusion phenomena. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2405-8440 |
| العلاقة: | http://www.sciencedirect.com/science/article/pii/S2405844024024228Test; https://doaj.org/toc/2405-8440Test |
| DOI: | 10.1016/j.heliyon.2024.e26391 |
| الوصول الحر: | https://doaj.org/article/2e149e7a5b1a4996bffc0792172303dcTest |
| رقم الانضمام: | edsdoj.2e149e7a5b1a4996bffc0792172303dc |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 24058440 |
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| DOI: | 10.1016/j.heliyon.2024.e26391 |