Mats A Fagerquist1,2, Vivek Sethi3, Eli Skytteren1, Anders Oden4. 1. Department of Obstetrics and Gynecology, Innlandet Hospital Trust, Kongsvinger Hospital, Norway. 2. Department of Obstetrics and Gynecology, North Elfsborg County Hospital, Trollhattan, Sweden. 3. Department of Obstetrics and Gynecology, Akershus University Hospital, Lorenskog, Norway. 4. Chalmers University of Technology, Gothenburg, Sweden.
Abstract
INTRODUCTION: The aim of this study was to compare the intra-observer repeatability when using two different methods for estimating the volume of foetal urinary bladders. METHOD: The urinary bladders of 20 foetuses were documented by three-dimensional ultrasound. Standard deviation was compared when the volumes of identical bladder images were repeatedly estimated using the Virtual Organ Computer-aided AnaLysis and the experimental SUM-OF-CYLINDERS methods. RESULTS: No systematic deviation was found between the estimated volumes when using these two methods. Standard deviation was smaller for the SUM-OF-CYLINDERS compared to the Virtual Organ Computer-aided AnaLysis method (p < 0.0001). In relation to bladder volumes of 5-25 ml, standard deviation was 11-14% for the Virtual Organ Computer-aided AnaLysis and 4-5% for the SUM-OF-CYLINDERS method. CONCLUSIONS: Using three-dimensional ultrasound images adapted for the Virtual Organ Computer-aided AnaLysis method, foetal urinary bladder volumes can also be estimated using the SUM-OF-CYLINDERS method. The SUM-OF-CYLINDERS method employs technical advances which may result in a lower standard deviation and therefore higher intra-observer repeatability.
INTRODUCTION: The aim of this study was to compare the intra-observer repeatability when using two different methods for estimating the volume of foetal urinary bladders. METHOD: The urinary bladders of 20 foetuses were documented by three-dimensional ultrasound. Standard deviation was compared when the volumes of identical bladder images were repeatedly estimated using the Virtual Organ Computer-aided AnaLysis and the experimental SUM-OF-CYLINDERS methods. RESULTS: No systematic deviation was found between the estimated volumes when using these two methods. Standard deviation was smaller for the SUM-OF-CYLINDERS compared to the Virtual Organ Computer-aided AnaLysis method (p < 0.0001). In relation to bladder volumes of 5-25 ml, standard deviation was 11-14% for the Virtual Organ Computer-aided AnaLysis and 4-5% for the SUM-OF-CYLINDERS method. CONCLUSIONS: Using three-dimensional ultrasound images adapted for the Virtual Organ Computer-aided AnaLysis method, foetal urinary bladder volumes can also be estimated using the SUM-OF-CYLINDERS method. The SUM-OF-CYLINDERS method employs technical advances which may result in a lower standard deviation and therefore higher intra-observer repeatability.
Entities:
Keywords:
Foetus; diagnostic technique and procedure; reliability; ultrasonography; urinary bladder
Authors: C Touboul; O Picone; J M Levaillant; C Boithias; R Frydman; M Boulvain; M V Senat Journal: Ultrasound Obstet Gynecol Date: 2009-11 Impact factor: 7.299
Authors: Seung Mi Lee; Jong Kwan Jun; Su Ah Kim; Eun Ja Lee; Byoung Jae Kim; Chan-Wook Park; Joong Shin Park Journal: J Ultrasound Med Date: 2014-12 Impact factor: 2.153