Fig. 14From: Post-treatment MRI aspects of photodynamic therapy for prostate cancerAsymmetry/symmetry. Axial T2-weighted MR images from before treatment (a) and 6 months after treatment (b) in a 65-year-old patient with left unilateral photodynamic therapy illustrate post-treatment asymmetric prostate due to unilateral scar tissue. However, pre-treatment (c) and 6-month post-treatment (d) MRIs in a case of bilateral treatment (71-year-old patient) illustrate a symmetrical aspect. Note the disappearance of the peripheral zone of the treated lobes on the 6-month MRIsBack to article page