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1. www.webmd.com › dvt › doppler-ultrasoundColor Doppler Ultrasound: Purpose, Preparation, Procedure, ...

   www.webmd.com › dvt › doppler-ultrasound

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   2022年11月30日 · Instead, it turns sound waves into images. Your doctor can use it to check for issues with blood flow, such as clots in your veins or blockages in your arteries. It’s one of the main ways to ...

2. www.webmd.com › eyeThe Eyes (Human Anatomy): Diagram, Optic Nerve, Iris, ...

   www.webmd.com › eye

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   2022年5月10日 · Light projects through your pupil and lens to the back of the eye. The inside lining of the eye is covered by special light-sensing cells that are collectively called the retina. It converts light...