Foreshortening is the result of overangulation of the x-ray beam. Thaum foreshortening tshwm sim thaum siv cov txheej txheem paralleling, lub angulation ntawm lub x-ray beam yog ntau tshaj qhov ntev axis dav hlau ntawm cov hniav. … Qhov kev ua yuam kev no kuj tuaj yeem tshwm sim yog tias tus receptor tsis muab tso rau tib lub sijhawm mus rau qhov ntev ntawm cov hniav.
Qhov txawv ntawm foreshortening thiab elongation yog dab tsi?
Qhov txawv ntawm elongation thiab foreshortening yog dab tsi? ELongation project the object long than it really is, hos foreshortening projects the object to shorter than it really is.
Dab tsi yog qhov ua rau muaj kev cuam tshuam ntau dhau?
Yog vim li cas vim li cas koj cov duab hluav taws xob yuav raug tshaj tawm
Ib qho yuam kev hauv cov txheej txheem (kVp lossis mAs nqis). A tshuab lossis khoom yuam kev. Siv cov txheej txheem kab sib chaws tsis muaj kab sib chaws. Variations nyob rau hauv cov ntxaij vab tshaus.
Dab tsi yog elongation radiography?
1. kev ua lossis txheej txheem nce ntxiv. 2. radiographic distortion nyob rau hauv uas daim duab ntev tshaj li qhov uas yog x-rayed.
Cov hniav dab tsi ua Bitewings qhia?
Bitewing X-rays qhia cov ntsiab lus ntawm cov hniav sab sauv thiab qishauv ib cheeb tsam ntawm lub qhov ncauj. Txhua qhov bitewing qhia ib tus hniav los ntawm nws cov yas (qhov chaw nthuav tawm) mus rau theem ntawm cov pob txha txhawb nqa. Bitewing X-rays pom kev lwj ntawm cov hniav thiab kev hloov ntawm cov pob txha tuab los ntawm cov pos hniav.
