![]() ![]() Please contact Hamilton Radiology on 07-839 4909 or 0800 HAMRAD (0800 426723) for an appointment. Please settle your account on the day of the examination ![]() The Radiologist will review the ultrasound images and provide a written report to your doctor. You will be asked not to talk when the transducer is on your neck, as talking will make the vessels move. The Sonographer may tap you on the side of your head gently during the exam this is to help identify different vessels. When the Sonographer performs this scan, they will be using colour and pulsed Doppler, which means you will see different colours on the TV monitor and hear different sounds. A small towel will be used to protect your clothes. Gel will be spread on your neck, which will allow us to obtain high quality images. You will be asked to lie on a bed and bare your neck. Who does the test?Ī Sonographer (Technologist trained specifically in ultrasound) will perform the examination. Please bring any relevant x-rays or scans. It is advisable to wear an open-neck shirt or top and not a high necked or collared top, to make it easier to access the vessels of the neck. The panel also considered various technical aspects of carotid US and methods for quality assessment, and identified several important unanswered questions meriting future research.Your doctor may ask you to have a carotid ultrasound for a number of reasons including prior to cardiac surgery, after unusual "turns" and after a suspected stroke. The conclusion should state an estimated degree of ICA stenosis as reflected in these categories. Infarctions related to internal carotid artery stenosis may be deep, subcortical, or cortical. Study limitations should be noted when they exist. Computed tomographic (CT) scanning and magnetic resonance imaging (MRI) are useful for evaluating the question of cerebral infarction which may result from carotid artery stenosis. Fifth, the final report should discuss velocity measurements and grayscale and color Doppler findings. Fourth, ICA should be diagnosed as normal when ICA PSV is less than 125 cm/second and no plaque or intimal thickening is visible, less than 50% stenosis when ICA PSV is less than 125 cm/second and plaque or intimal thickening is visible, 50 to 69% stenosis when ICA PSV is 125 to 230 cm/second and plaque is visible, > or =70% stenosis to near occlusion when ICA PSV is more than 230 cm/second and visible plaque and lumen narrowing are seen, near occlusion when there is a markedly narrowed lumen on color Doppler US, and total occlusion when there is no detectable patent lumen on grayscale US and no flow on spectral, power, and color Doppler US. Two additional parameters (the ICA-to-common carotid artery PSV ratio and ICA end diastolic velocity) may also be used when clinical or technical factors raise concern that ICA PSV may not be representative of the extent of disease. Third, ICA peak systolic velocity (PSV) and the presence of plaque on grayscale and/or color Doppler images are primarily used in the diagnosis and grading of ICA stenosis. Second, the degree of stenosis determined at grayscale and Doppler US should be stratified into the categories of normal (no stenosis), less than 50% stenosis, 50 to 69% stenosis, > or =70% stenosis to near occlusion, near occlusion, and total occlusion. Key elements of the statement include the following: First, all internal carotid artery (ICA) examinations should be performed with grayscale, color Doppler, and spectral Doppler US. Presence of neck bruit/pulsatile mass Preparation Patient in supine position with head extended and turned to the opposite side. The panel's consensus statement is believed to represent a reasonable position on the basis of analysis of available literature and panelists' experience. H/o atherosclerosis, cardiovascular, cerebrovascular, or peripheral vascular diseases 2. The Society of Radiologists in Ultrasound convened a multidisciplinary panel of experts in the field of vascular ultrasonography (US) to come to a consensus regarding Doppler US for assistance in the diagnosis of carotid artery stenosis. ![]()
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