Video: Dab tsi yog qhov txhais ntawm cov ntaub ntawv nyoos hauv CT?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov ntaub ntawv nyoos yog qhov tseem ceeb ntawm tag nrho cov ntsuas ntsuas ntsuas thaum lub sijhawm scan. Los ntawm cov no cov ntaub ntawv tus CT dluab yog reconstructed nrog rau kev siv cov txheej txheem lej xws li convolution filtering thiab back projection.
Tom qab ntawd, lub suab txhais li cas hauv CT?
Suab . (p) Cov suab (hauv xam tomography) yog qhov piv ntawm tus neeg mob lub rooj nce mus rau tag nrho nominal beam dav rau CT scan. Cov suab qhov xwm txheej hais txog qhov ntim ceev ceev mus rau cov ntu thinnest uas tuaj yeem tsim kho dua tshiab.
Ib yam li ntawd, Sinogram CT yog dab tsi? A sinogram yog ib txoj kev x-ray tshwj xeeb uas yog ua kom pom qhov txawv txav ntawm qhov qhib (sinus) hauv lub cev, tom qab txhaj tshuaj ntawm qhov sib piv media (x-ray dye) rau hauv qhov qhib. Tsis muaj kev txwv kev noj zaub mov ua ntej a sinogram.
Ntxiv mus, qhov txawv ntawm cov ntaub ntawv nyoos thiab cov ntaub ntawv duab yog dab tsi?
Cov duab nyoos - duab muaj tag nrho cov tsav tsheb cov ntaub ntawv - ib daim ntawv luam ntawm tus tsav qhov chaw khaws cia hauv ib qho lossis cov ntaub ntawv. Cov duab duab - duab uas tsuas yog siv cov pawg tsav. Cov duab duab muaj feem xyuam rau cov logical drives thiab partitions nkaus xwb.
Reconstruction hauv CT yog dab tsi?
Duab reconstruction nyob rau hauv CT yog cov txheej txheem lej uas tsim cov duab tomographic los ntawm X-ray projection cov ntaub ntawv tau txais ntawm ntau lub kaum ntse ntse nyob ib puag ncig tus neeg mob. Ob pawg loj ntawm kev tsim kho dua tshiab txoj kev muaj, analytical kev tsim kho dua tshiab thiab rov hais dua kev tsim kho dua tshiab (IR).
Pom zoo:
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