Medical Imaging Physics - Radiology Practice Questions

Medical imaging physics is a branch of medical physics that focuses on the principles and techniques used in medical imaging, such as X-rays, CT scans, MRI, and ultrasound.

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The purpose of medical imaging is to visualize internal structures and functions of the human body for diagnostic and therapeutic purposes.

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Ionizing radiation has enough energy to remove tightly bound electrons from atoms, while non-ionizing radiation does not have enough energy to do so.

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X-ray imaging works by passing X-rays through the body, which are then absorbed or scattered by different tissues. The remaining X-rays are detected and converted into an image.

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CT imaging uses X-rays and a rotating gantry to acquire multiple cross-sectional images of the body. These images are then reconstructed into a 3D image using computer algorithms.

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The main advantage of MRI is its ability to provide detailed images of soft tissues, such as the brain, muscles, and organs, without using ionizing radiation.

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Ultrasound imaging works by emitting high-frequency sound waves into the body and detecting the echoes produced by different tissues. These echoes are then used to create an image.

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Contrast agents are substances that are used to enhance the visibility of certain structures or functions in medical imaging. They can be administered orally, intravenously, or through other routes.

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