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Q: What are radiopaque materials used for?

A: Radiopaque materials are used within medical catheters so that the device can be easily seen on X-ray film and under fluoroscopy in a radiology lab in order to provide medical practitioners with the ability to precisely position the device inside the body. The type and amount of radiopaque filler compounded with the thermoplastic material of the catheter, determines how they appear on screen. The filler affects the degree of contrast and the sharpness of the image because it influences the attenuation of X-rays passing through the body and the device.

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