MP63-04 DEVELOPING A FREE THREE-DIMENSIONAL TOOL FOR KIDNEY STONES’ SURGICAL PLANNING : CALCULATOR

Abstract

You have accessJournal of UrologyStone Disease: Surgical Therapy VI (MP63)1 Apr 2020MP63-04 DEVELOPING A FREE THREE-DIMENSIONAL TOOL FOR KIDNEY STONES’ SURGICAL PLANNING : CALCULATOR Frederic Panthier*, Steeve Doizi, Laurent Berthe, and Olivier Traxer Frederic Panthier*Frederic Panthier* More articles by this author , Steeve DoiziSteeve Doizi More articles by this author , Laurent BertheLaurent Berthe More articles by this author , and Olivier TraxerOlivier Traxer More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000000938.04AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Flexible ureteroscopy has gained in popularity for kidney stone treatment. However, operative time may be variable according to the stone burden. We aimed to develop a three-dimensional (3D) tool for kidney stones’ surgical planning. METHODS: 3DSlicer is a free open-source software platform for medical image computing (DICOM) and 3D visualization. Both MATLAB and Python scripting are available to develop new modules, using the “Extension Developing tool”. Major developing criteria were: suitable for CT-scan DICOM series, definition of a region of interest (ROI), stone single- or multiple-detection based on Hounsfield Units, 3D visualization. Minor criteria were expected duration of lithotripsy based on laser source (Holmium:YAG or Superpulse Thulium Laser Fiber), core-diameter laser fibers and laser settings. RESULTS: CALCULator is a Python scripted module, available in 3DSlicer. Before using it, definition of a ROI is required with “Crop Volume” module. ROI is adjustable upon axial, sagittal and coronal views of a non-enhanced CT-scan DICOM series. From ROIs, CALCULator defines an adjustable segmentation based on thresholds to detect stones. « Split islands into segments » option is useful in case of multiple stones, but requires a minimal size criteria (voxel). 3D view is optional in order to maximize computing time. Final view contains axial, sagittal and coronal views, with segment’s volume and lithotripsy duration among chosen laser settings. Figure 1 shows a clinical example of a single kidney stone measurement and expected lithotripsy duration among chosen laser settings. CONCLUSIONS: CALCULator is a free 3DSlicer module that provides stones volumes and expected lithotripsy duration among laser settings, based on segmentation principle with CT-scan DICOM series. Surgical planification should be useful in kidney stone procedures. Source of Funding: French Association of Urology research grant © 2020 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 203Issue Supplement 4April 2020Page: e955-e955 Advertisement Copyright & Permissions© 2020 by American Urological Association Education and Research, Inc.MetricsAuthor Information Frederic Panthier* More articles by this author Steeve Doizi More articles by this author Laurent Berthe More articles by this author Olivier Traxer More articles by this author Expand All Advertisement PDF downloadLoading ...