Video: Dab tsi ua rau radiographic ceev?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum lub sijhawm mA lossis lub sijhawm raug nce , tus naj npawb x-ray photons tsim los ntawm anode nce linearly tsis muaj nce beam zog. Qhov no yuav ua rau ntau dua ntawm photons mus txog qhov receptor thiab qhov no ua rau tag nrho nce hauv ceev ntawm hluav taws xob duab (Daim duab 2).
Yog li ntawd, dab tsi cuam tshuam rau radiographic ceev?
Ob peb yam muaj cuam tshuam diagnostic peev xwm ntawm cov hluav taws xob duab xws li kVp, lub sij hawm raug, mA, pom, collimation, daim phiaj, thiab hom ntawm txoj hauj lwm qhia ntaus ntawv.
Ib yam li ntawd, radiographic ceev yog dab tsi? Radiographic ceev (AKA optical, duab, lossis zaj duab xis ceev ) yog ib qho kev ntsuas ntawm qhov degree ntawm zaj duab xis darkening. Los ntawm lub rooj no, nws pom tau tias a ceev kev nyeem ntawv ntawm 2.0 yog qhov tshwm sim ntawm tsuas yog ib feem pua ntawm qhov teeb meem teeb pom kev los ntawm zaj duab xis.
Tsis tas li ntawd, dab tsi tswj radiographic ceev?
Txawm hais tias cov khoom ntawm lub raj tam sim no thiab lub sij hawm raug, ntsuas hauv milliampere-seconds (mA·s), yog qhov tseem ceeb ntawm kev tswj hwm ntawm radiographic ceev , kVp kuj cuam tshuam rau radiographic ceev tsis ncaj.
Dab tsi yog 5 radiographic densities?
Cov tsib yooj yim radiographic ceev : huab cua, rog, dej (cov ntaub so ntswg mos), pob txha, thiab hlau. Huab cua yog cov xov tooj cua tshaj plaws (blackest) thiab hlau yog feem ntau radiopaque (dawb tshaj).
Pom zoo:
Yuav ua li cas tshwm sim thaum physiological ceev yog siab tshaj arithmetic ceev?
Lub physiological ceev los yog tiag tiag pejxeem yog tus naj npawb ntawm cov neeg nyob rau hauv ib cheeb tsam ntawm arableland. Lub cev muaj zog ntau dua qhia tau hais tias cov av ua liaj ua teb muaj ntau dua thiab tuaj yeem ncav cuag nws cov khoom tso tawm sai dua li lub teb chaws uas muaj qhov ntom ntom ntawm lub cev
Dab tsi yog qhov ceev txiav txim rau koj cov qauv dej?
Qhov loj thiab qhov loj ntawm cov molecules nyob rau hauv cov kua thiab ze npaum li cas lawv tau ntim ua ke txiav txim siab qhov ntom ntawm cov kua. Ib yam li cov khoom, qhov ntom ntawm cov kua sib npaug ntawm cov kua faib los ntawm nws qhov ntim; D = m/v. Qhov ceev ntawm cov dej yog 1 gram ib cubic centimeter
Qhov ceev ntawm mercury 13.6 g cm3 nyob rau hauv units ntawm kg m3 yog dab tsi?
Teb yog: qhov ceev ntawm mercury yog 13600kg / m³. 1 g/cm³ yuav muab 1000kilogram/cubic meter
Dab tsi yog qhov txawv ntawm instantaneous thiab nruab nrab ceev dab tsi yog qhov piv txwv loj tshaj ntawm kev ceev ceev?
Qhov nruab nrab ceev yog qhov ceev nruab nrab ntawm lub sijhawm. Instantaneous ceev yuav yog qhov ceev txhua qhov muab tam sim ntawd hauv lub sijhawm ntawd, ntsuas nrog lub ntsuas ntsuas lub sijhawm
Dab tsi yog cov yam ntxwv tswj hwm qhov sib txawv ntawm radiographic?
Nyob rau hauv cov pa radiography, qhov sib txawv nyob ntawm seb qhov loj ntawm cov nplej, lub sij hawm kev loj hlob, lub concentration thiab kub ntawm cov kev daws teeb meem, thiab tag nrho cov zaj duab xis ceev