Video: Qhov twg yog qhov kev teeb tsa pob txha pob txha?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Saib pob txha , cov qhov rais qib yog teeb ntawm txog 250 HU nrog qhov dav qhov rais dav (1000 HU). Rau cov txheej txheem ntawm cov nqaij mos, qib ntawm 50 HU thiab qhov dav ntawm 250 HU raug xaiv. Rau cov qauv ua kom muaj huab cua (piv txwv li lub ntsws) qib −600 HU thiab dav 1000 HU tau siv.
Raws li qhov tseeb, uas yog lub qhov rooj mos qhov muag raug?
(a) Txheem qhov rai teeb rau cov ntaub so ntswg lossis lub hlwb kwv yees li 60-80HU dav thiab 40HU qib (daim ntawv nyuaj nyuaj). (b, c) Kev siv cov khoom tsis zoo, hloov pauv muag muag copy, nqaim qhov rai thiab qib chaw pom ntau pom pom tseeb ntawm kev hloov pauv ntawm ishcaemic thaum ntxov (cov xub).
Ib tug kuj yuav nug, qhov qhov rais dav thiab qhov rais theem hauv CT yog dab tsi? CT IMAGE DISPLAY • Qhov ntau ntawm CT cov lej saum toj thiab hauv qab cov qhov rais theem hu npe qhov rais dav , uas txiav txim siab qhov sib txawv • Ib qho nqaim qhov rais dav muab qhov sib txawv siab dua qhov dav qhov rais dav • Qhov rai theem & qhov dav dav tuaj yeem teem rau txhua qhov xav tau ntawm CT tus lej.
Qhov thib ob, lub pob qhov rooj yog dab tsi?
' Pob txha qhov rais 'tau siv los hais txog qhov nqaim ntawm qhov ntom ntom ze rau qhov ntom ntom ntawm pob txha . Thaum saib CT scan ntawm lub hlwb, ob lub hlwb qhov rais cov duab thiab pob qhov rooj cov duab yuav tsum tau saib niaj hnub.
Qhov rai theem hauv hluav taws xob yog dab tsi?
Windowing, tseem hu ua grey- qib daim ntawv qhia, sib piv stretching, hloov histogram los yog qhov sib txawv li qub yog cov txheej txheem uas CT duab greyscale tivthaiv ntawm ib daim duab yog manipulated ntawm CT tooj; ua qhov no yuav hloov qhov tsos ntawm daim duab kom pom cov qauv tshwj xeeb.
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