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Correlation of Contrast-Enhanced Power Doppler Sonography and Conventional Angiography of Abduction-Induced Hip Ischemia in Piglets

¹ Department of Radiology, Children's Hospital, 300 Longwood Ave., Boston, MA 02115.
² Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114.

View larger version (148K): [in a new window]   Fig. 1A. —Coronal power Doppler sonograms of same piglet hip. M = femoral metaphysis. Unenhanced power Doppler image obtained in neutral position shows little flow in cartilaginous femoral head (arrowheads).

View larger version (129K): [in a new window]   Fig. 1B. —Coronal power Doppler sonograms of same piglet hip. M = femoral metaphysis. Enhanced power Doppler image obtained in neutral position shows improved conspicuity of vessels in cartilaginous femoral head (arrowheads).

View larger version (141K): [in a new window]   Fig. 1C. —Coronal power Doppler sonograms of same piglet hip. M = femoral metaphysis. Unenhanced power Doppler image obtained during forced hyperabduction shows absent flow in femoral head (arrowheads).

View larger version (125K): [in a new window]   Fig. 1D. —Coronal power Doppler sonograms of same piglet hip. M = femoral metaphysis. Enhanced power Doppler image obtained during forced hyperabduction shows qualitative decrease in power Doppler signal in cartilaginous femoral head (arrowheads).

View larger version (15K): [in a new window]   Fig. 2A. —Bar graphs represent mean pixel intensity in neutral position, forced hyperabduction, and release back to neutral position. Graph shows that changes in mean pixel intensity on unenhanced power Doppler sonograms are not significantly different in three hip positions (p = 0.28).

View larger version (15K): [in a new window]   Fig. 2B. —Bar graphs represent mean pixel intensity in neutral position, forced hyperabduction, and release back to neutral position. Graph shows that mean pixel intensity on enhanced power Doppler sonograms is significantly lower during forced hyperabduction compared with neutral position (p < 0.001).

View larger version (212K): [in a new window]   Fig. 3A. —Digital angiographic images of piglet hip. Angiogram obtained in neutral position shows contrast opacification of left femoral artery (f), profunda femoris artery (p), and medial circumflex artery (arrow).

View larger version (208K): [in a new window]   Fig. 3B. —Digital angiographic images of piglet hip. Digital angiographic image of same piglet obtained with hips held in forced hyperabduction shows complete occlusion of left profunda femoris artery (arrow).

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