Yahoo Malaysia Web Search

Sign In

Search results

  1. radiopaedia.org › articles › aliasing-phenomenon-ultrasoundAliasing phenomenon (ultrasound) | Radiology Reference Article...

    8 Jun 2024 · Aliasing is a phenomenon inherent to Doppler modalities which utilize intermittent sampling in which an insufficient sampling rate results in an inability to record direction and velocity accurately.

    • Edit Article

      Did we fool you? Okay, so Rad-RADS 1.0 was just an April...

  2. www.ncbi.nlm.nih.gov › pmc › articlesBasics for performing a high-quality color Doppler sonography of...

    28 Jul 2021 · A brief analysis of the Doppler inherent artefacts (as random noise, blooming, aliasing, and motion artefacts) and the adjustment setting to minimize or eliminate the confounding artefacts are also considered. Doppler aliasing occurs when the pulse repetition frequency is set too low.

  3. Videos

    View all

  4. www.ncbi.nlm.nih.gov › books › NBK580539Sonography Doppler Flow Imaging Instrumentation - StatPearls -...

    1 Mei 2023 · High-velocity flow that causes aliasing on the highest PRF settings, and can be aligned with low Doppler angles, such as in cardiac imaging, can sometimes be better characterized using CW Doppler mode.

  5. www.youtube.com › watchUnderstanding Aliasing in Doppler - YouTube

    18 Ogo 2019 · Understanding Aliasing in Doppler. This is the second lecture from our Doppler Module pertaining to the Vascular Sonography vCourse (virtual course). Lectures are very didactic and will...

  6. Images

    • Basics of Doppler Ultrasound for the Nephrologist- Part 2 - Renal ...
    • Basics of Doppler Ultrasound for the Nephrologist- Part 2 - Renal ...
    • Obstetrics doppler ultrasound

    View all

  7. www.ajronline.org › doi › pdfplusIn Doppler sonography, what is aliasing, and how does it help ......

    invelocity produces higher Doppler frequency shifts than would occurinnormal-caliber vessels.Thesehigh-frequency shiftsmay alias,localizing thestenosis. Question JonathanM.Rubin University ofMichigan Hospital, AnnArbor,Ml What isthe role ofsonographic breast imaging fordetecting occultcancerinapatient withastrong family history ofbreast can-

  8. johnsonfrancis.org › professional › aliasingAliasing and Nyquist limit in Doppler echocardiography

    16 Mei 2012 · Aliasing is a phenomenon in pulsed Doppler echocardiography in which when the velocity is beyond a particular limit known as the Nyquist limit, the direction of flow is depicted as opposite to that of the actual one. Nyquist limit is half the pulse repetition frequency of the ultrasound signal emitted by the Doppler transducer.

  9. link.springer.com › chapter › 10Doppler Imaging: Basic Principles and Clinical Application

    9 Mac 2016 · An important limitation of pulsed Doppler is the incapability to correctly detect velocities higher than one-half PRF (Nyquist limit), resulting in a misinterpretation of the Doppler signal known as aliasing phenomenon. In fact, the time interval between sampling pulses must be sufficient for a pulse to make the return journey from the ...