LADP-2 Njira Yowunika ya Pulsed NMR
Pulsed Fourier amasintha mphamvu yamagetsi yamagetsi amagwiritsa ntchito pulsed RF field kuti ichitepo kanthu pa zida za nyukiliya kuti ziwone kuyankha kwa zida za nyukiliya, ndipo imagwiritsa ntchito ukadaulo wachangu wa Fourier transform (FFT) kuti isinthe chizindikiritso cha nthawi kukhala chizindikiritso cha frequency, chomwe chiri ofanana ndi ma frequency angapo osakanikirana amagetsi a nyukiliya omwe amakhala ndi maginito amakhala osangalala nthawi yomweyo, chifukwa chake chodabwitsa cha nyukiliya chitha kuwonedwa mosiyanasiyana, ndipo chizindikirocho ndi chokhazikika Pakadali pano, njira yogwiritsira ntchito imagwiritsidwa ntchito pamawonedwe ambiri a NMR, pomwe Njira yogwiritsira ntchito imagwiritsidwa ntchito mu MRI.
Zoyesera
1. Mvetsetsani malingaliro oyambira ndi kuyesa kwamachitidwe a PNMR. Phunzirani kufotokozera zochitika zokhudzana ndi PNMR pogwiritsa ntchito vekitala yoyeserera.
2. Phunzirani kugwiritsa ntchito zizindikilo za spin echo (SE) ndi kuwola kwaulere kwaulere (FID) kuyeza T2(nthawi yopuma yopuma). Fufuzani mphamvu ya maginito homogeneity pa chizindikiro cha NMR.
3. Phunzirani kuyeza T1 (nthawi yopuma yozungulira) pogwiritsa ntchito njira yobwezeretsanso.
4. Kumvetsetsa bwino magwiridwe antchito, onani momwe mphamvu ya ma paramagnetic imathandizira panthawi yopumula ya nyukiliya.
5. Muyeso T2zamkuwa sulphate yankho m'malo osiyanasiyana. Sankhani ubale wa T2 ndi kusintha kwa ndende.
6. Yesani kusunthika kwa mankhwalawa.
Zofunika
Kufotokozera | Zofunika |
Mphamvu yamagawo oyeserera | Kutalika kwaposachedwa kwa 0.5 A, kuwongolera kwamagetsi 0 - 6.00 V |
Mphamvu yamagawo amtundu umodzi | Kutalika kwaposachedwa kwa 0.5 A, kuwongolera kwamagetsi 0 - 6.00 V |
Mafupipafupi a Oscillator | 20 MHz |
Mphamvu yamaginito yamagetsi | 0,470 T |
Maginito pole awiri | 100 mamilimita |
Maginito pole mtunda | Mamilimita 20 |
Magnetic field homogeneity | 20 ppm (10 mm × 10 mm × 10 mm) |
Kutentha kolamulidwa | 36.500 ° C |
Magnetic field bata | Kutentha kwa maola 4 kuti kukhazikika, Ma frequency a Larmor amayenda osakwana 5 Hz pamphindi. |
Mndandanda Wazigawo
Kufotokozera | Zambiri | Zindikirani |
Zonse Kutentha Unit | 1 | kuphatikizapo maginito ndi chida chowongolera kutentha |
RF Yotumiza Unit | 1 | kuphatikizapo magetsi oyendetsera gawo |
Chizindikiro Cholandira | 1 | kuphatikizapo magetsi a munda wofanana komanso kuwonetsa kutentha |
Chingwe cha Mphamvu | 1 | |
Chingwe zingapo | 12 | |
Zitsanzo machubu | 10 | |
Buku Lophunzitsira | 1 |