Objective: to explore the use of voice mapping for assessing changes in phonatory function following injection laryngoplasty in patients with unilateral vocal fold paralysis (UVFP). Materials and methods: Two patient cohorts were analyzed. Cohort 1 (N=8) received in-office injections of hyaluronic acid or calcium hydroxylapatite, with voice recordings acquired before and immediately after treatment. Cohort 2 (N=4) underwent autologous fat injection under general anesthesia, with follow-ups at 1 and 3 months. All patients completed standard speech tasks with simultaneous acquisition of acoustic and electroglottographic (EGG) signals. Voice maps were computed using the FonaDyn system. Perceptual GRBAS ratings were provided by three blinded expert raters. Results: Voice mapping was feasible in all patients and revealed consistent treatment effects. Across both cohorts, the cycle-rate sample entropy (CSE) decreased, while the normalized peak dEGG (Q(Delta)) and the Index of Contacting (I-c) both increased, indicating improved phonatory stability and vocal fold contact. Perceptual ratings showed corresponding reductions in breathiness and overall dysphonia. Conclusions: The voice map representation clearly visualized and quantified phonatory changes post-treatment for UVFP, with potential applications in clinical monitoring and outcome evaluation.