From Dr. Bicuspid:
…reported overwhelming evidence that CBCT is a preferred method for detecting vertical root fractures, compared with radiography.
Sensitivity of CBCT vs. radiography for teeth cracks CBCT Radiography Graduate student 77.27% 22.73% Endodontist 81.81% 8.19% Radiologist 88.64% 11.36%
The linked study compared users, grad students vs. radiologists vs. endodontists as well as devices PA vs CBCT. The evidence is clear that CBCT finds more fractures sooner than conventional 2 dimensional PAs.
However the study did not look at non radiographic techniques like The Canary or transillumination.