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Ankle and Foot 47 - Department of Radiology - University of ...

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2300 VII Imaging <strong>of</strong> the Musculoskeletal System<br />

A<br />

B<br />

C<br />

D<br />

Figure <strong>47</strong>-104. Calcaneal stress fracture in a 62-year-old. A, Lateral radiograph shows a sclerotic b<strong>and</strong> (black arrowheads) in the characteristic<br />

position <strong>of</strong> a calcaneal stress fracture, perpendicular to the trabeculae (white arrowheads). Incidentally seen is an os peroneum (arrow), a<br />

common normal variant. B, Midsagittal T1-weighted image shows the characteristic well-defined black line (arrowheads) <strong>of</strong> a calcaneal stress<br />

fracture. C, The corresponding midsagittal T2-weighted fat-suppressed (T2FS) image also shows the dark fracture line (arrowheads) as well as<br />

surrounding bone marrow edema. D, Sagittal inversion recovery (IR) image shown for comparison with the T2FS image (C). On the IR image, the<br />

normal fatty bone marrow is very dark, making the bone marrow edema more conspicuous. Arrowheads show the calcaneal stress fracture.<br />

Ch0<strong>47</strong>-A05375.indd 2300<br />

9/9/2008 5:36:00 PM

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