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Peroneal Tendon Subluxation and Dislocation: Detection on Volume-rendered Images—Initial Experience¹

¹ From the Department of Radiology, University of Iowa Roy J. and Lucille A. Carver College of Medicine, 200 Hawkins Dr, Iowa City, IA 52242. From the 2004 RSNA Annual Meeting. Received June 14, 2005; revision requested August 12; revision received October 26; accepted November 14; final version accepted March 20, 2006. Address correspondence to K.O. (e-mail: kenjirou-ohashi{at}uiowa.edu).

View larger version (90K): [in this window] [in a new window] [Download PPT slide]   Figure 1: Transverse MPR image obtained perpendicular to the long axis of the tibia demonstrates normal peroneal tendons (long arrow) that are located posterior to the posterolateral margin of the distal fibular cortex and medial to the superior retinaculum (short arrow).

View larger version (149K): [in this window] [in a new window] [Download PPT slide]   Figure 2: Three-dimesional volume-rendered image (viewed from lateral aspect) demonstrates normal peroneal tendons (long arrow) that are located posterior to the posterolateral margin of the distal fibular cortex (short arrow). This relationship was evaluated as the reader viewed the ankle from the lateral, posterolateral, and posterior aspects by rotating the 3D volume-rendered image.

View larger version (99K): [in this window] [in a new window] [Download PPT slide]   Figure 3a: (a) MPR image and (b–d) 3D volume-rendered images of an ankle and foot that have been immobilized in a cast. In a, an increase in attenuation is diffusely seen in the subcutaneous fat tissues around the peroneal tendons (long arrow), with the cast materials around the ankle. The cast materials seen in b have been removed by using a software function, and the image was rotated in c to view the ankle from the lateral aspect. In d, the window width and window level settings were adjusted to better visualize the peroneal tendons (arrow).

View larger version (137K): [in this window] [in a new window] [Download PPT slide]   Figure 3b: (a) MPR image and (b–d) 3D volume-rendered images of an ankle and foot that have been immobilized in a cast. In a, an increase in attenuation is diffusely seen in the subcutaneous fat tissues around the peroneal tendons (long arrow), with the cast materials around the ankle. The cast materials seen in b have been removed by using a software function, and the image was rotated in c to view the ankle from the lateral aspect. In d, the window width and window level settings were adjusted to better visualize the peroneal tendons (arrow).

View larger version (126K): [in this window] [in a new window] [Download PPT slide]   Figure 3c: (a) MPR image and (b–d) 3D volume-rendered images of an ankle and foot that have been immobilized in a cast. In a, an increase in attenuation is diffusely seen in the subcutaneous fat tissues around the peroneal tendons (long arrow), with the cast materials around the ankle. The cast materials seen in b have been removed by using a software function, and the image was rotated in c to view the ankle from the lateral aspect. In d, the window width and window level settings were adjusted to better visualize the peroneal tendons (arrow).

View larger version (110K): [in this window] [in a new window] [Download PPT slide]   Figure 3d: (a) MPR image and (b–d) 3D volume-rendered images of an ankle and foot that have been immobilized in a cast. In a, an increase in attenuation is diffusely seen in the subcutaneous fat tissues around the peroneal tendons (long arrow), with the cast materials around the ankle. The cast materials seen in b have been removed by using a software function, and the image was rotated in c to view the ankle from the lateral aspect. In d, the window width and window level settings were adjusted to better visualize the peroneal tendons (arrow).