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A 41-year-old female asked:

How accurate is a ct scan?

2 doctor answers2 doctors weighed in
Dr. Peter Nefcy
Radiology 40 years experience
Difficult to say: A CT scan is a mathematical model of the inside of whatever body part is being scanned, based on the measurement of attenuation of the x-ray beam from multiple points on the outside. The accuracy is determined by whether a specific size abnormality can be seen, which varies with different diseases. A CT abnormality seen is accurate, but the disease causing this may not be easily determined.
Dr. Michael Gabor
Diagnostic Radiology 34 years experience
It depends on: the potential abnormality being assessed, assuming an appropriate and technically adequate CT scan was performed.

Similar questions

A 31-year-old member asked:

Can a CT scan without contrast be accurate?

2 doctor answers4 doctors weighed in
Dr. Steven Chmielewski
Diagnostic Radiology 31 years experience
Depends.: For kidney stones we use no contrast, but we don't get as good a look at the solid organs. Contrast is usually helpful, but not always necessary.

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Last updated Jan 5, 2020
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