Video: Dab tsi yog sab lobe hauv ultrasound?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Sab lobes thiab grating lobes artifacts hauv ultrasound duab. Sab lobes thiab grating lobes yog ob qho tsis xav tau ntawm ultrasound nqaj tawm tawm ntawm lub axis uas tsim cov duab cuav vim yog qhov yuam kev hauv qhov tso rov qab ncha.
Ntxiv mus, dab tsi yog sab lobe artifact?
Sab lobe artifacts tshwm sim qhov twg paj lobes cuam tshuam lub suab los ntawm qhov muaj zog cuam tshuam uas nyob sab nraum ntawm lub hauv paus nqaj, thiab qhov twg cov ncha tau nthuav tawm zoo li yog lawv tuaj ntawm sab hauv nruab nrab nqaj. Cov kab radial no hu ua paj lob kab teeb.
Qhov thib ob, dab tsi ua rau sab lobes? Hauv engineering kav hlau txais xov, paj lobes los yog sidelobes yog cov lobes (maxima hauv zos) ntawm cov qauv hluav taws xob nyob deb ntawm tus kav hlau txais xov lossis lwm qhov chaw tawg, uas tsis yog lub ntsiab lub paj hlwb . Hauv kev xa cov kav hlau txais xov, ntau dhau paj lob hluav taws xob pov tseg lub zog thiab tej zaum ua cuam tshuam rau lwm yam khoom siv.
Xav txog qhov no, qib sab lobe yog dab tsi?
Dab tsi yog Sidelobe Qib (SLL) 1. Qhov sib piv, feem ntau hais tawm hauv decibels (dB), ntawm qhov dav ntawm qhov siab ntawm lub ntsiab lub paj hlwb mus rau qhov dav ntawm qhov siab ntawm a paj lob . Kawm paub ntau ntxiv hauv: Kev Ua Kom Zoo Tshaj ntawm Array Antenna thiab Microwave Filters Siv Qhov Sib Txawv Ntawm Cov Txheej Txheem Txheej Txheem.
Dab tsi yog daim iav duab hauv ultrasound?
Daim iav duab cov khoom qub Daim iav duab artefact yog ib qho ntawm txoj kab nqes khoom. Cov no tshwm sim thaum twg ultrasound nqaj tsis tau cuam tshuam ncaj qha rov qab mus rau tus hloov pauv tom qab tsoo lub ntsej muag cuam tshuam, tab sis yuav siv sijhawm rov qab los.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm txoj hauv kev sab hauv thiab sab hauv ntawm cov ntshav khov?
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Dab tsi yog txoj haujlwm ntawm sab laug sab laug sab laug?
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