There was a significant (27%) patient radiation dose reduction for CT CAP in oncology patients by using a single-pass CT CAP protocol. The image quality of the single-pass protocol appears to be comparable to the conventional protocol. The single-pass protocol scans were also not more difficult to perform by radiographers than the conventional protocol scans. However, as stated below there were significant limitations encountered and more research in this area is required for validation of the results.

Limitations:

1. Although the radiologists were not informed what protocol each scan was when grading the imaging quality, there is admittedly a slight visual difference between two scans. This is because in the research protocol scan, the aorta and its branches are opacified with denser contrast media (arterial phase contrast from the second bolus of contrast media). Therefore complete blinding was not achievable.
2. As stated above complete diagnostic accuracy was not assessed in this study.
3. Assessment of image quality is subjective, as was demonstrated by low kappa values.