Video: Yuav ua li cas yog tias koj nce kVp?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ib nce hauv kVp ua txuas ntxiv thiab ua kom lub zog x-ray emission spectrum, xws li qhov siab tshaj plaws thiab qhov nruab nrab / muaj txiaj ntsig zoo siab dua thiab cov photon naj npawb / siv ntau dua.
Ib yam li ntawd, koj tuaj yeem nug, qhov nce kVp cuam tshuam li cas?
Radiation quality los yog kVp ua : nws muaj qhov zoo nyhuv ntawm qhov 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 sab saum toj no, kVp cuam tshuam li cas rau cov duab zoo? nyhuv ntawm mAs thiab kVp ua ntawm daws teeb meem thiab ntawm duab sib piv. Tus thawj xyaum ua tej yam pom tias, thaum cov zaj duab xis ceev cia tsis tu ncua, ntau dua qhov lub kVp ua , qhov qis dua daws teeb meem thiab duab qhov sib piv feem pua; kuj, qhov siab dua qhov mAs, qhov siab dua daws teeb meem thiab duab qhov sib piv feem pua.
Ib sab ntawm no, puas nce kVp nce tawg?
kVp ua tswj cov cuab yeej hu ua "radiographic contrast" ntawm cov duab x-ray (qhov sib piv ntawm cov hluav taws xob xa hluav taws xob los ntawm cov cheeb tsam ntawm qhov sib txawv thickness los yog ntom). Txawm li cas los xij, tawg tawg x-rays kuj pab tau nce zaj duab xis ntom: qhov siab dua kVp ua ntawm beam, ntau tawg tawg yuav raug tsim tawm.
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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