Video: MAs thiab kVp yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov siab dua kVp ua , qhov ntau 'kev nkag mus' yuav xrays. Thicker lub cev qhov yuav tsum tau siab dua kVp ua Txawm li cas los xij, siab dua kVp ua tsim ntau dua hluav taws xob mAs , los yog milliampere-thib ob, yog ib qho kev piav qhia ntawm ionizing hluav taws xob siv nyob rau hauv ib qho kev ntsuam xyuas tshwj xeeb.
Hauv qhov no, kVp thiab mAs hauv hluav taws xob yog dab tsi?
Kilovoltage ncov. Nrog rau mAs (tube tam sim no thiab lub sij hawm raug cov khoom) thiab pom, kVp ua (tube voltage) yog ib qho ntawm cov kev teeb tsa tseem ceeb uas tuaj yeem hloov kho rau x-ray tshuab los tswj cov duab zoo thiab cov neeg mob koob tshuaj.
Ib yam li ntawd, vim li cas kVp siab siv hauv CT? Tshwj xeeb tshaj yog nyob rau hauv lub cev loj, xws li cov neeg laus rog rog, qis zog photons yog absorbed kiag li tsis muaj kev pab rau cov duab tsim. Hauv cov xwm txheej zoo li no, mas kVp yog ua hauj lwm los txhim kho lub x-ray siv mus txog lub receptor, yog li ua kom lub teeb liab rau suab nrov piv ntawm cov dluab.
Xav txog qhov no, kVp thiab mAs cuam tshuam li cas rau cov duab zoo?
Thawj qhov kev sim qhia tau hais tias, thaum zaj duab xis ntom yog khaws cia tsis tu ncua, qhov siab dua kVp ua , qhov qis dua daws teeb meem thiab duab qhov sib piv feem pua; kuj, qhov siab dua mAs , qhov siab dua daws teeb meem thiab duab qhov sib piv feem pua.
kVp cuam tshuam qhov sib txawv 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.
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