Oncology Publications
Title
3D Thoracoscopic Ultrasound Volume Measurement Validation in an Ex Vivo and In Vivo Porcine Model of Lung Tumours
Document Type
Article
Publication Date
1-7-2007
Journal
Physics in Medicine and Biology
Volume
52
Issue
1
First Page
91
Last Page
106
Abstract
The purpose of this study was to validate the accuracy and reliability of volume measurements obtained using three-dimensional (3D) thoracoscopic ultrasound (US) imaging. Artificial "tumours" were created by injecting a liquid agar mixture into spherical moulds of known volume. Once solidified, the "tumours" were implanted into the lung tissue in both a porcine lung sample ex vivo and a surgical porcine model in vivo. 3D US images were created by mechanically rotating the thoracoscopic ultrasound probe about its long axis while the transducer was maintained in close contact with the tissue. Volume measurements were made by one observer using the ultrasound images and a manual-radial segmentation technique and these were compared with the known volumes of the agar. In vitro measurements had average accuracy and precision of 4.76% and 1.77%, respectively; in vivo measurements had average accuracy and precision of 8.18% and 1.75%, respectively. The 3D thoracoscopic ultrasound can be used to accurately and reproducibly measure "tumour" volumes both in vivo and ex vivo.
Notes
Published in: Phys. Med. Biol., 52, 91-106. doi: 10.1088/0031-9155/52/1/007