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
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 3 156-165Subject Categories
Radiology, Nuclear Medicine and Medical Imaging
Computer Vision and Robotics (Autonomous Systems)
Medical Image Processing
DOI
10.1177/1742271X17709854