Correlation of contrast-enhanced power Doppler sonography and conventional angiography of abduction-induced hip ischemia in piglets

AJR. American Journal of Roentgenology
C E BarnewoltPatricia S Dunning

Abstract

The purpose of this study was to determine if enhanced power Doppler sonography can detect early ischemia of the capital femoral epiphysis induced by hip hyperabduction in piglets and to correlate these findings with angiography. Proximal femoral perfusion was evaluated in 18 studies of 10 piglet hips with unenhanced power Doppler sonography, enhanced power Doppler sonography with IV contrast agent, and digital angiography, in neutral position, hyperabduction, and after release to neutral position. Enhancement ratios between pixel intensities of power Doppler sonography and enhanced power Doppler images in each position were calculated. Angiograms were analyzed for differences in flow with changes in hip position. With the piglet in neutral position, power Doppler sonography revealed few vessels in the femoral head. Contrast administration resulted in a temporary marked increase in the visualization of vessels in the femoral head. Quantitative enhanced power Doppler sonography revealed a marked decrease in pixel intensity with abduction (p < 0.001) that was not apparent on unenhanced studies (p = 0.28). The enhancement ratio decreased from 0.45 (mean +/- SD, +/- 0.26) in neutral position to 0.10 (+/- 0.21) after abduction; it r...Continue Reading

References

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Citations

May 8, 2010·Pediatric Radiology·David K YousefzadehChristopher Sullivan
Nov 22, 2014·AJR. American Journal of Roentgenology·Vanessa Starr, Bo Yoon Ha
May 30, 2003·Radiology·Diego JaramilloFrederic Shapiro
May 13, 2009·Canadian Association of Radiologists Journal = Journal L'Association Canadienne Des Radiologistes·Clara L Ortiz-NeiraAndrea S Doria
Jul 25, 2019·Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine·Susan J BackWudbhav N Sankar

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