Computed tomography diagnostic quality

Are all CT scans the same quality?
Fundamentally, image quality in CT, as in all medical imaging, depends on 4 basic factors: image contrast, spatial resolution, image noise, and artifacts.
Depending on the diagnostic task, these factors interact to determine sensitivity (the ability to perceive low-contrast structures) and the visibility of details..
How accurate are CT scan diagnosis?
A cancer diagnosis based on CT scan has the potential to be completely wrong – up to 30% of the time That means that 30% of the time people will either be told they don't have cancer when they do or people will be told they do have cancer when they don't, based on CT scans alone..
What are the factors of CT image quality?
The image quality is mainly determined by 3 factors: Resolution.
Noise.
Contrast..
What is the diagnostic accuracy of a CT scan?
By per patient analysis, the sensitivities, specificities, and diagnostic accuracies of CT and USG were 100%, 90%, 97% and 100%, 80%, 95%, respectively..

Are all CT scans the same quality?