Dab tsi yog qhov ua rau quantum mottle?
Dab tsi yog qhov ua rau quantum mottle?

Video: Dab tsi yog qhov ua rau quantum mottle?

Video: Dab tsi yog qhov ua rau quantum mottle?
Video: Ua Dab Tsi Txhaum Koj - David Yang (New Song 2021) 2024, Kaum ib hlis
Anonim

Quantum mottle yog hom hluav taws xob hluav taws xob ncaj qha ntsig txog tus naj npawb ntawm x-ray photons tawm ntawm tus neeg mob thiab tsim cov duab hluav taws xob. Tsawg dua photons ncav cuag cov duab receptor yuav ua rau ib qho kev hloov pauv tsis txaus ntseeg hauv cov duab ntom ntom, ua rau cov duab nrog lub ntsej muag, lossis zoo li sandlike.

Ib yam li ntawd, dab tsi ua rau quantum suab nrov?

QUANTUM NOISE . X-ray photons cuam tshuam rau ntawm qhov chaw, xws li cov duab receptor, nyob rau hauv tus qauv random. Nyob rau hauv tag nrho cov txheej txheem duab siv x-ray lossis gamma photons, feem ntau ntawm cov duab suab nrov yog tsim los ntawm random yam uas cov photons raug faib nyob rau hauv daim duab. Qhov no feem ntau raug xaiv quantum suab.

Tsis tas li ntawd, kVp cuam tshuam qhov sib txawv li cas? Radiation quality los yog kVp ua : nws muaj txiaj ntsig zoo rau kev kawm sib piv . Ib qho qis kVp ua yuav ua rau x-ray beam tsis nkag. Ib siab dua kVp ua yuav ua rau x-ray beam nkag tau ntau dua. Qhov no yuav ua rau qhov sib txawv ntawm qhov attenuation ntawm qhov sib txawv ntawm qhov kev kawm, ua rau qis dua sib piv.

Ib yam li ib tug yuav nug, dab tsi yog quantum mottle artifact?

Quantum mottle yog qhov kev hloov pauv ntawm cov lej ntawm photons absorbed los ntawm cov ntxaij vab tshaus intensifying los tsim cov duab teeb ntawm zaj duab xis. Quantum Mottle artifact yog thaum cov x-rays raug tsim tawm tab sis tsis tsim nyob rau hauv ib yam nkaus.

Yuav ua li cas thaum koj nce mas?

Ib nce nyob rau hauv tam sim no (mA) ua rau muaj ntau dua ntawm electrons uas nyob rau hauv lub x-ray raj uas yuav, yog li ntawd, nce qhov ntau ntawm hluav taws xob; Cov hluav taws xob ntau dua yuav ua rau ntau cov photons mus txog qhov ntsuas thiab yog li qhov pom tseeb ntawm qhov ntom ntom yuav txo qis, tab sis qhov teeb liab siv yuav nce.

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