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	What's the smallest thing you can detect in the body with an MRI or a CT scan? Is it 10 millimetres or smaller? What's the smallest tumour you can pick up? Maggie in St. Andrews
	The resolution of MR is in millimetres. Obviously if you wanted to go further with CT, you could, but it would require a greater radiation dose.
	February 2007

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Listen to this as part of the show: 11th Feb 2007 - Nuclear Power
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