Video: HVL suav li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txiav txim siab qhov attenuation coefficient ntawm cov khoom. Qhov no tuaj yeem pom hauv lub rooj ntawm attenuation coefficient lossis los ntawm cov chaw tsim khoom ntawm cov khoom. Faib 0.693 los ntawm attenuation coefficient los txiav txim qhov HVL . Cov txheej txheem ib nrab nqi yog HVL = = 0,693/Μ.
Tom qab ntawd, ib tus tuaj yeem nug, HVL suav nrog hauv hluav taws xob li cas?
HVL yog lub thickness ntawm cov khoom nkag los ntawm ib nrab ntawm cov hluav taws xob thiab qhia nyob rau hauv units ntawm qhov deb (mm los yog cm). HVL Luas = 0.693 X Average Range = 0.693/µ. Qhov no qhia tau hais tias lub HVL yog inversely proportional rau attenuation coefficient.
Qhov thib ob, vim li cas ib nrab nqi txheej tseem ceeb? Ib nrab nqi txheej . HVL yog ib tseem ceeb Kev tswj xyuas zoo raws li nws yog siv los ntsuas seb puas muaj kev pom txaus hauv lub x-ray beam kom tshem tawm cov hluav taws xob tsawg, uas tuaj yeem ua rau puas tsuaj. Nws tseem yuav pab txiav txim seb hom thiab thickness ntawm shielding xav tau nyob rau hauv qhov chaw.
Ib sab saum toj no, HVL yog dab tsi hauv hluav taws xob?
Ib nrab nqi txheej ( HVL ) yog qhov dav ntawm cov khoom yuav tsum tau txo cov cua kerma ntawm ib qho x-ray los yog gamma-ray mus rau ib nrab ntawm nws tus nqi qub. Qhov no siv rau nqaim beam geometry nkaus xwb raws li broad-beam geometry yuav muaj kev cuam tshuam loj heev, uas yuav ua rau qis qis qis ntawm qhov attenuation. HVL = 0.693 / Μ
Ib nrab nqi txheej txhais li cas?
Ib cov ntaub ntawv ib nrab - tus nqi txheej ( HVL ), los yog ib nrab - tus nqi tuab, yog cov thickness ntawm cov khoom uas qhov kev siv ntawm hluav taws xob nkag mus rau nws yog txo los ntawm ib tug ib nrab.
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