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This prospective study compared bladder volume accuracy measured by a manual fanning scan (MFS) approach versus a traditional motorized scan (TMS) approach. Patients undergoing urodynamic testing in late 2024 had true bladder volume defined by voided plus postvoid residual volumes. Results from 39 participants showed similar measurement accuracy across both methods, with stronger correlation for TMS.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":35,"@type":76,"position":81},"https://docshare.wps.com/document/healthcare/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/accuracy-of-portable-ultrasound-measurement-of-the-bladder-volume-using-the-manual-fanning-scan-and-traditional-motorized-scan-methods/459911/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/accuracy-of-portable-ultrasound-measurement-of-the-bladder-volume-using-the-manual-fanning-scan-and-traditional-motorized-scan-methods/459911.png","ImageObject",300,407,{"name":92,"@type":93},"McQueen","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-09-30",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What was the purpose of comparing MFS and TMS in this study?","Question",{"text":112,"@type":113},"To compare the accuracy of a portable ultrasound bladder scanner for measuring bladder volume using manual fanning scan (MFS) versus traditional motorized scan (TMS) methods.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How was true bladder volume (T-BV) defined?",{"text":117,"@type":113},"T-BV was defined as the sum of the voided volume and the postvoid residual volume drained through the urethral catheter after voiding.",{"name":119,"@type":110,"acceptedAnswer":120},"Did the two scanning methods differ in bladder volume accuracy?",{"text":121,"@type":113},"No. Bladder volume measurements and differences versus T-BV showed no significant difference between TMS and MFS, although correlation with T-BV was stronger for TMS.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},459911,1792180148,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":34,"category_name":35,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":29,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144,"preview_page_count":4},5909890329169,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","Original Article  \nInt Neurourol J 2025;29(4):296-301  \n[https://doi.org/10.5213/inj.2550190.095](https://doi.org/10.5213/inj.2550190.095)[ ](https://doi.org/10.5213/inj.2550190.095)pISSN 2093-4777 · eISSN 2093-6931  \nAccuracy of Portable Ultrasound Measurement of the Bladder Volume Using the Manual Fanning Scan and Traditional Motorized Scan Methods  \nHyun Ju Jeong1, Seung-June Oh1,2  \n1Department of Medical Device Development, Seoul National University College of Medicine, Seoul, Korea  \n2Department of Urology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Korea  \nPurpose: 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.  \nMethods: 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.  \nResults: Data from 39 patients (30 males and 9 females; mean age, 65.3 ± 14.8 years) were analyzed. TMS-BV (230.9 ± 157.9 mL) and MFS-BV (222.6 ± 154.2 mL) did not differ significantly from T-BV (230.6 ± 156.6 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 ± 50.2) did not differ significantly from the mean difference between MFS-BV and T-BV (-8.0 ± 69.1) (P > 0.05). The correlation between TMS-BV and T-BV (R2 = 0.90) was stronger than that between MFS-BV and T-BV (R2 = 0.81).  \nConclusions: The correlation between MFS-type PUBS and T-BV was lower than that between TMS-type PUBS and T-BV. However, the measurement accuracy of BV was similar using both methods.  \nKeywords: Lower urinary tract symptoms; Ultrasonography; Urinary bladder  \n• Grant/Fund Support: This research was supported by the Mcube Technology Co., Ltd. (Project No. 0620244480).  \n• Research Ethics: This study was approved by the Institutional Review Board (IRB) of Seoul National University Hospital (IRB approval No. 2408-155-1566) and was conducted in compliance with the Declaration of Helsinki and the ethical standards of the IRB. Written informed consent was obtained from all the participants.  \n• Conflict of Interest: No potential conflict of interest relevant to this article was reported.  \nINTRODUCTION  \nPortable ultrasound bladder scanner (PUBS) is widely used to measure postvoid residual volume (PVR) in patients with lower  \nurinary tract dysfunction (LUTD) [1-3]. In PUBS using the traditional motorized scan (TMS) method, bladder volume (BV) is calculated by reconstructing bladder images obtained using a mechanical sector probe in 3 dimensions—a widely adopted  \nCorresponding author: Seung-June Oh  [https://orcid.org/0000-0002-0322-3539](https://orcid.org/0000-0002-0322-3539)[ ](https://orcid.org/0000-0002-0322-3539)Department of Urology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 03080, Korea  \n[Email: sjo@snu.ac.kr](Email: sjo@snu.ac.kr)  \nSubmitted: July 18, 2025 / Accepted after revision: September 2, 2025  \nThis is an Open Access article distributed under the terms of the Cre  \native Commons Attribution Non-Commercial License ([https://creative](https://creative)[commons.org/licenses/by-nc/4.0/](commons.org/licenses/by-nc/4.0/)) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.  \nCopyright © 2025 Korean Continence Society [www.einj.org](www.einj.org)  \nJeong and Oh • Bladder Volume Accuracy by Manual Fanning Sca","cbCaihNidGlHkP3o","https://ap.wps.com/l/cbCaihNidGlHkP3o","pdf",313848,"English","# Introduction\n# Materials and Methods\n## Patients\n## Study Design\n# Results\n# Conclusions","[{\"question\":\"What was the purpose of comparing MFS and TMS in this study?\",\"answer\":\"To compare the accuracy of a portable ultrasound bladder scanner for measuring bladder volume using manual fanning scan (MFS) versus traditional motorized scan (TMS) methods.\"},{\"question\":\"How was true bladder volume (T-BV) defined?\",\"answer\":\"T-BV was defined as the sum of the voided volume and the postvoid residual volume drained through the urethral catheter after voiding.\"},{\"question\":\"Did the two scanning methods differ in bladder volume accuracy?\",\"answer\":\"No. Bladder volume measurements and differences versus T-BV showed no significant difference between TMS and MFS, although correlation with T-BV was stronger for TMS.\"}]","Accuracy of Portable Ultrasound Measurement of the Bladder Volume Using the Manual Fanning Scan and Traditional Motorized Scan Methods | PDF",1790757250,15]