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Three-dimensional esophageal varix model quantification of variceal volume by high-resolution endoluminal US.

Abstract：

BACKGROUND:The purpose of this study was to evaluate the accuracy and reproducibility of three-dimensional volume measurements by high-resolution endoluminal ultrasound in an esophageal varix model. METHODS:An esophageal varix model was made by filling three esophageal dilatation catheters with various volumes of water. A 20 MHz ultrasonography transducer was then pulled along the length of the catheters at a constant rate (1.25 mm/sec) while videotaping the procedure. Cross-sectional surface area measurements of each catheter were taken every second and the cross-sectional surface area was multiplied by the length of each catheter, as determined by high-resolution endoluminal ultrasound, to determine the volume in each catheter. Interobserver variability was calculated, and three-dimensional reconstruction was performed. RESULTS:The measured volumes corresponded closely with the actual volumes with an error ranging from 0% to 15.4%. The correlation between actual and measured volumes was r = 0.988. The interobserver variability ranged from r = 0.951 to r = 0.994. Actual esophageal varices were then imaged in a similar fashion to determine the feasibility of this method in patients with esophageal varices. CONCLUSIONS:High-resolution endoluminal ultrasound is an accurate and reproducible method of measuring volumes in an esophageal varix model and can be used in a clinical setting to determine variceal volume. Volume studies are now underway in human subjects.

journal_name

Gastrointest Endosc

journal_title

Gastrointestinal endoscopy

authors

Chung CY,McCray WH,Dhaliwal S,Haywood T,Black M,Liu JB,Miller LS

doi

10.1067/mge.2000.105725

keywords:

subject

Has Abstract

pub_date

2000-07-01 00:00:00

pages

87-90

issue

1

eissn

0016-5107

issn

1097-6779

pii

S0016-5107(00)53172-1

journal_volume

52

pub_type

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