Koj puas nkag siab cov duab tawm los ntawm xoo hluav taws xob tshuab?

Nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev txhim kho kev kho mob technology, qhov yuav muaj cov neeg muaj qhov xoo hluav taws xob thaum lawv mus tom tsev kho mob tseem muaj ntau ntxiv. Txhua tus paub tias lub hauv siab xoo hluav taws xob, CT, xim ultrasound thiab xoo hluav taws xob tshuab tuaj yeem tso cov neeg mob nkag mus rau tus kabmob. Lawv kuj paub tias x-rays emit radiation, tab sis muaj pes tsawg tus neeg nkag siab X-ray machine. Yuav ua li cas hais txog emitted rays?
Ua ntej, yuav ua li cas yog x-rays hauv ibXoo hluav taws xob tshuabtsim tawm? Cov xwm txheej xav tau rau kev tsim cov x-rays siv nyob rau hauv cov tshuaj muaj raws li nram no: Lub tshuab nqus tsev iav: Lub tshuab nqus tsev iav: lub tshuab nqus tsev iav: Lub tshuab nqus tsev iav, catrode thiab anode; 2 3. Cov hluav taws xob txav ntawm qhov kev kub ceev: Thov cov khoom siv siab ntau ntawm ob qho kawg ntawm X-Pob Hluav Taws Xob kom ua rau cov tshuab hluav taws xob txav ntawm kev kub ceev. Cov kev hloov tshwj xeeb tshwj xeeb ntawm cov neeg muaj txoj sia nyob rau cov hluav taws xob uas yuav tsum tau. Tom qab lub tungsten phaj yog ntaus los ntawm cov tshuab hluav taws xob txav ntawm kev kub ceev, cov atoms ntawm tungsten tuaj yeem tsim kho kom x-rays.
Thib ob, yog dab tsi ntawm cov duab hluav taws xob no, thiab vim li cas nws tuaj yeem siv los soj ntsuam tus mob tom qab nkag mus rau tib neeg lub cev? Qhov no yog txhua yam vim tias cov khoom ntawm x-rays, uas muaj peb qhov khoom loj:
1. Kev Nkag mus: Kev nkag siab yog hais txog qhov muaj peev xwm ntawm X-Rays los dhau los ntawm cov tshuaj uas tsis tau nqus. X-Rays tuaj yeem nkag cov ntaub ntawv rau cov khoom siv uas pom tau pom tsis tau. Pom lub teeb muaj nthwv dej ntev ntev, thiab photons muaj lub zog me me. Thaum nws tsoo ib qho khoom, ib feem ntawm nws tau xav txog, feem ntau ntawm nws yog nqus los ntawm teeb meem, thiab tsis tuaj yeem hla ntawm cov khoom; Thaum X-Rays tsis yog, vim hais tias ntawm lawv cov nthwv dej luv, lub zog thaum nws ci rau ntawm cov khoom siv atomic, qhia qhov muaj zog nkag mus. Muaj peev xwm ntawm X-Rays rau cov teeb meem nkag mus rau lub zog ntawm xoo hluav taws xob photons. Tus luv luv lub nthwv dej ntawm cov duab xoo hluav taws xob, qhov ntau dua lub zog ntawm lub photons thiab cov muaj zog dua cov zog. Qhov kev nkag siab lub zog ntawm x-rays kuj muaj feem xyuam rau qhov ntom ntawm cov khoom. Cov khoom siv denser nqus tau ntau dua x-rays thiab transmits tsawg dua; Cov khoom siv denser nqus tsawg dua thiab xa cov khoom dua. Siv cov cuab yeej no ntawm kev nqus cov nqaij cuam sib txawv, cov nqaij mos xws li cov pob txha, cov leeg nqaij, thiab cov rog uas muaj ntau yam sib txawv tuaj yeem txawv. Nov yog lub hauv paus ntawm lub cev ntawm X-Tshav Fluoroscopy thiab kev yees duab.
2. Ionization: Thaum ib qho khoom siv los ntawm cov duab xoo hluav taws xob los ntawm cov duab xoo hluav taws xob, cov tshuaj eleveclear yog muab tshem tawm los ntawm atomic orbit. Cov nyhuv no hu ua ionization. Nyob rau hauv cov txheej txheem ntawm cov nyhuv photielectric thiab tawg, cov txheej txheem nyob rau hauv uas cov kws yees duab sib cais los ntawm lawv cov atoms yog hu ua Koomoog Koom Haum Koom Haum. Cov yees duab no los yog Recoil Electrons collide nrog lwm cov atoms thaum taug kev, kom cov electrons los ntawm ntaus atoms yog hu ua theem nrab ionization. hauv cov khib nyiab thiab kua. Lub ionized zoo thiab tsis zoo ions yuav decombine sai thiab tsis yooj yim mus sau. Txawm li cas los xij, txoj kev them nqi ionized rau hauv cov roj yog ib qho yooj yim los sau, thiab tus nqi ntawm kev siv xoo hluav taws xob: x-ray kev ntsuas yog ua raws li lub ntsiab cai no. Vim ionization, gases tuaj yeem ua hluav taws xob; qee cov tshuaj yuav yauv ua cov tshuaj lom neeg; Ntau cov txiaj ntsig roj ntsha tuaj yeem tsim tawm hauv cov kab mob muaj sia. Ionization yog lub hauv paus ntawm xoo hluav taws xob puas tsuaj thiab kev kho mob.
3. Fluorescence: Vim tias lub suab luv luv ntawm cov xoo hluav taws xob, nws yog qhov tsis pom. Txawm li cas los xij, thaum nws yog irradiated rau qee qhov sib txuas lus xws li phosphorus, calmium cadfide, thiab lwm yam atoms lossis excitions, thiab lwm yam. Nws emits pom los yog ultraviolet lub teeb, uas yog fluorescence. Cov txiaj ntsig ntawm X-Rays ua cov tshuaj yeeb rau fluoresce yog hu ua fluorescence. Qhov siv zog ntawm fluorescence yog ib qho sib xws rau tus nqi ntawm x-rays. Cov nyhuv no yog lub hauv paus rau daim ntawv thov ntawm X-Rays rau Fluoroscopy. Hauv xoo hluav taws xob kuaj mob ua haujlwm, hom fluorescence no tuaj yeem siv los ua cov tshuaj fluorescent, vijtsam ntxiv rau hauv cov duab ua rau muaj kev sib zog thiab lwm yam. Screen Fluorescent yog siv los soj ntsuam cov duab ntawm X-Rays dhau los ntawm cov tshuaj fluoroscopy, thiab qhov ntsuas kom muaj zog los txhim kho cov yeeb yaj kiab thaum lub yees duab. Qhov saum toj no yog ib qho kev taw qhia dav dav rau cov xoo hluav taws xob.
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