Intra-observer repeatability when assessing the foetal urinary bladder volume by the Virtual Organ Computer-aided AnaLysis and SUM-OF-CYLINDERS methods: A pilot study
Journal article, 2017

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.

ultrasonography

diagnostic technique and procedure

Foetus

urinary bladder

reliability

Author

M. Fagerquist

NU Hospital Group

Innlandet Hospital Trust

Vivek Sethi

Akershus University Hospital

E. Skytteren

Innlandet Hospital Trust

Anders Odén

Chalmers, Mathematical Sciences, Applied Mathematics and Statistics

Ultrasound

1742-271X (ISSN) 17431344 (eISSN)

Vol. 25 3 156-165

Subject Categories

Radiology, Nuclear Medicine and Medical Imaging

Computer Vision and Robotics (Autonomous Systems)

Medical Image Processing

DOI

10.1177/1742271X17709854

More information

Latest update

1/12/2021