Coronal curvature measurement on AIS using ultrasonic imaging method

Speaker: Dr. Rui Zheng

Time and Date: 9:30- , Apr. 21, 2014

Place: Room 521, Physics Building, Handan Campus

Abstract

Scoliosis is a three-dimensional deformity of the spine. The Cobb angle is the gold standard to diagnose and monitor scoliosis and is measured on standing posteroanterior (PA) radiographs. The objective of this study is to validate the in-vivo measurements from the ultrasound on AIS patients is clinically comparable with radiograph measurements. A medical ultrasound system is used to scan patients who meet the inclusion criteria. The coronal, sagittal and transverse views were able to display. Comparison was made between the coronal curvature measured by each rater using the center of lamina (COL) method (ultrasound) and the Cobb angle method (radiography) on two separate occasions. The ICC(2,1) values of intra- and inter-rater reliability on the US method were greater than 0.80. The standard error of measurement (SEM) on both of the intra- and inter-rater US methods was less than 2.8°. The correlation coefficient (R) between the US and radiographic methods ranged between 0.78-0.84 among 3 raters. This pilot study demonstrates the coronal curvature measurement from ultrasound is 3.4o different from radiographs which was below the clinical accepted error (5°).