Evaluation of Spectra A and B modes in diagnosis of suspicious bladder lesions.

Background White light imaging (WLI) cystoscopy, a "Gold standard" for diagnosis of non-muscle invasive bladder cancer (NMIBC), can miss about 25% of bladder cancers. Spectra A (SA) and Spectra B (SB) are virtual optical chromoendoscopy modes introduced by Storz.