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  2. Carotid ultrasonography - Wikipedia

    en.wikipedia.org/wiki/Carotid_ultrasonography

    Carotid ultrasound is a low-cost, noninvasive, and accurate diagnostic imaging modality used to evaluate diseases of the carotid arteries. [2] It is most often used to diagnose carotid artery stenosis, a form of atherosclerosis , and has the capability to assess plaque morphology and characteristics. [ 1 ]

  3. Transcranial Doppler - Wikipedia

    en.wikipedia.org/wiki/Transcranial_Doppler

    The ultrasound probe emits a high-frequency sound wave (usually a multiple of 2 MHz) that bounces off various substances in the body. These echoes are detected by a sensor in the probe. In the case of blood in an artery , the echoes have different frequencies depending on the direction and speed of the blood because of the Doppler effect . [ 2 ]

  4. Medical ultrasound - Wikipedia

    en.wikipedia.org/wiki/Medical_ultrasound

    The machine used is called an ultrasound machine, a sonograph or an echograph. The visual image formed using this technique is called an ultrasonogram, a sonogram or an echogram. Ultrasound of carotid artery. Ultrasound is composed of sound waves with frequencies greater than 20,000 Hz, which is the approximate upper threshold of human hearing. [1]

  5. Intravascular ultrasound - Wikipedia

    en.wikipedia.org/wiki/Intravascular_ultrasound

    The ultrasound catheter tip is slid in over the guidewire and positioned, using angiography techniques so that the tip is at the farthest away position to be imaged. The sound waves are emitted from the catheter tip, are usually in the 20-40 MHz range, and the catheter also receives and conducts the return echo information out to the external ...

  6. Intima–media thickness - Wikipedia

    en.wikipedia.org/wiki/Intima–media_thickness

    Ultrasound measurements of carotid IMT were first proposed and validated in vitro by Paolo Pignoli in 1984 [2] and further details were subsequently published in a highly cited article. [3] The use of IMT as a non-invasive tool to track changes in arterial walls has increased substantially since the mid-1990s. [ 1 ]

  7. Portable ultrasound - Wikipedia

    en.wikipedia.org/wiki/Portable_ultrasound

    Portable ultrasound is a modality of medical ultrasonography that utilizes small and light devices, compared to the console-style ultrasound machines that preceded them. In most cases these mobile ultrasound systems could be carried by hand and in some cases even operated for a time on battery power alone.

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