An MRI can provide more details than both an ultrasound and a CT scan, yet still lack the detail and accuracy of a PET/CT scan. An acronym for Magnetic Resonance Imaging, MRIs use magnetism and radio waves to build a picture of the inside of the body. They look at variations in density of tissues, exploring shapes and shadows. This leaves technologists to make a best guess as to which shapes are cancerous or not, which can lead to false negatives and delay treatment.
On the other hand, a PET/CT scan can show whether tissue is cancerous or not; so you can avoid false negatives, as well as continuing treatment unnecessarily.
If MRIs are less detailed than PET/CT scans, why are they still being used (usually after both an ultrasound and a CT scan have been conducted)?
A PET/CT scan remains your best option for diagnostic imaging: PET/CTs can identify exactly where the cancer is in your body, its level of aggression, and if your treatment is working optimally. Please read more about why PET/CT scans are so effective and how you can get one immediately.
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