Ntibisanzwe Isi Igiciro Cyibiciro (250318)

Isoko ryibibanza byubushinwa - Ntibisanzwe Ibikoresho bya Magneti Yisi Yamagambo Yumunsi, Kubisobanura gusa!

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Pr-Nd Alloy

• Urwego rugezweho: 543.000 - 547.000
• Ibiciro: Ihamye hamwe nihindagurika rito

Dy-Fe Alloy

• Urwego rugezweho: 1.630.000 - 1.650.000
• Ibiciro: Ibisabwa bikomeye bishyigikira umuvuduko wo hejuru

Gukoresha Magnets muri MRI: Precision & Udushya (598 chars)
Scaneri ya kijyambere ya MRI yishingikiriza kuri niobium-titanium (NbTi) ingirabuzimafatizo zikonjesha zikonjeshwa na helium y'amazi kugirango zitange imirima 1.5-7T. Iterambere rikomeye:

• Umwanya umwe: Shimming igaragara neza ikosora ≤0.5ppm gutandukana ukoresheje igihe nyacyo B₀ ikarita (TR = 2ms)
• Gucunga: Ibyiciro byinshi byo kugabanya umuvuduko ukwirakwiza ingufu za 15MJ muri 0.3s mugihe cyo kunanirwa kwa coil
• Cryogenics: Gufunga-cycle cryocoolers ikomeza 4.2K hamwe na <10⁻⁶ W / ㎡ kumeneka yumuriro

Ibipimo ngenderwaho:

• Nb₃Sn: Kugera kuri 21T @ 15K (Laboratwari ya Brookhaven 2024), ituma ultra-high-field MRI
• Sisitemu Zeru: Bika helium 1500L mumyaka 10+ ukoresheje firigo ya magnetiki (tekinoroji ikomoka kuri NASA)
• Ishusho ya AI: Kwiga byimbitse byubaka 0.5mm 切片图像 kuva kuri 50% amakuru yibanze (缩短扫描时间 42%)

Uruganda: Sisitemu ya 7T Terra ya Siemens igabanya urusaku rwa acoustic kugeza kuri 85dB (umurongo wa 110dB 常规 MRI) binyuze mu guhagarika ibikorwa byinyeganyeza, byongera ihumure ry’abarwayi.