{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T05:42:53Z","timestamp":1787031773737,"version":"build-2736575974"},"reference-count":17,"publisher":"Korean Continence Society","issue":"4","license":[{"start":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T00:00:00Z","timestamp":1767139200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["einj.org"],"crossmark-restriction":true},"short-container-title":["Int Neurourol J"],"published-print":{"date-parts":[[2025,12,31]]},"abstract":"Purpose: To compare the accuracy of portable ultrasound bladder scanner (PUBS) for measuring bladder volume (BV) using manual fanning scan (MFS) and traditional motorized scan (TMS) methods.Methods: Patients with lower urinary tract symptoms who underwent a urodynamic study at the urology outpatient clinic from October to December 2024 were prospectively enrolled. BV was measured using TMS-type (TMS-BV) and MFS-type (MFS-BV) PUBS prior to free uroflowmetry. True BV (T-BV) was defined as the sum of the voided volume and the postvoid residual volume drained through the urethral catheter after voiding. TMS-BV and MFS-BV were compared and analyzed against T-BV.Results: Data from 39 patients (30 males and 9 females; mean age, 65.3\u00b114.8 years) were analyzed. TMS-BV (230.9\u00b1157.9 mL) and MFS-BV (222.6\u00b1154.2 mL) did not differ significantly from T-BV (230.6\u00b1156.6 mL) (P>0.05). Comparison of the percentage of difference in volume between TMS-BV and MFS-BV across 100-mL BV ranges revealed no significant difference (P>0.05). The mean difference between TMS-BV and T-BV (0.2\u00b150.2) did not differ significantly from the mean difference between MFS-BV and T-BV (-8.0\u00b169.1) (P>0.05). The correlation between TMS-BV and T-BV (R<sup>2<\/sup>=0.90) was stronger than that between MFS-BV and T-BV (R<sup>2<\/sup>=0.81).Conclusions: The correlation between MFS-type PUBS and T-BV was lower than that between TMS-type PUBS and T-BV. 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