3-dimensional reconstruction volume (3DV): a novel method for volume measurement in kidney cancer Journal Article

Authors: Durso, T.; Carnell, J.; Turk, T; Gupta, G. N.
Article Title: 3-dimensional reconstruction volume (3DV): a novel method for volume measurement in kidney cancer
Abstract: Introduction: The role of volumetric estimation is becoming increasingly important in the staging, treatment and prognostication of benign and cancerous conditions of the kidney. We evaluated the use of 3-dimensional reconstruction volume (3DV) in determining renal parenchymal volumes (RPV) and renal tumor volumes (RTV). We compared 3DV to the currently available methods of volume assessment and determined its inter-user reliability. Materials and Methods: RPV and RTV were assessed in 28 patients who underwent robotic assisted laparoscopic partial nephrectomy for kidney cancer. Patients with preoperative creatinine of less than 1.2 mg/dl with available scans were selected. RPV and RTV were then assessed using 3DV, as well as cylindrical approximation for RPV and spherical approximation for RTV as previously described in the literature. Measures of the same quantity from each method were then compared. In addition, inter-user reliability was determined for 3DV. Results: Calculated volumes differed widely in comparison to 3DV. For example, cylindrical volumes for the contralateral kidney pre- and post-surgery overestimated 3D reconstruction volumes by 15-102% and 12-101%, respectively. In addition, volumes obtained from 3DV displayed high inter-user reliability regardless of experience. Conclusions: 3DV provides a highly reliable way of assessing kidney volumes. Given that 3DV takes into account visible anatomy, the differences observed using previously published methods can be attributed to the failure of geometry to accurately approximate kidney or tumor shape. 3DV provides a more accurate, reproducible and clinically useful tool for urologists looking to improve patient care using analysis related to volume.
Journal Title: Journal of endourology / Endourological Society
Volume: 28
Issue: 6
ISSN: 1557-900X; 0892-7790
Publisher: Unknown  
Date Published: 2014
Start Page: 745
End Page: 750
Language: ENG
Notes: JID: 8807503; aheadofprint