Table 1 Overview of the categories presented to the radiologists when tasked to assess the quality of the synthetic images.

From: Denoising diffusion probabilistic models for 3D medical image generation

 

Option A

Option B

Option C

Option D

Realistic image appearance

Overall not recognizable as CT/MRI

Overall unrealistic, but generally recognizable as CT/MRI

Overall realistic and only minor unrealistic areas

Can’t tell whether fake or not

Consistency between slices

No consistent slices

Only few (up to 3) slices are consistent

Majority of slices (> 10) are consistent

All slices are consistent

Anatomic correctness

Anatomic region not recognizable

Anatomic region recognizable, but major parts of the images exhibit anatomic incorrectness

Only minor anatomic incorrectness

Anatomic features are correct

  1. The radiologists were asked to select one of four options for each category.