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MDCT in the evaluation of skeletal trauma: principles, protocols, and clinical applications

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Abstract

Multidetector computed tomography (MDCT) scanners have made volume imaging possible and are used extensively to study polytrauma patients, especially in the evaluation of the spine and peripheral skeleton. An MDCT scanner coupled with a modern workstation has become an essential diagnostic tool for any emergency department. Familiarity with the basic physical principles of MDCT such as projection data, section collimation, and beam collimation is important to achieve high-quality imaging while keeping unnecessary radiation to a minimum. After a polytrauma MDCT examination, images can be reconstructed to obtain different slice thickness, slice interval, fields of view, or reconstruction kernels. No additional scanning is needed for imaging the thoracolumbar spine or bony pelvis. High-quality multiplanar reformation (MPR) and three-dimensional (3-D) images can be created at the workstation using the volumetric data. However, MDCT is a high-dose examination, and care should be taken to use as low a dose as possible. In the musculoskeletal system, MDCT has long been used for evaluation of spinal and pelvic trauma; however, the frequency of its use in extremity trauma has been low. In the extremities, radiography seems to underestimate the extent and severity of injury, especially in complex areas such as the shoulder, elbow, wrist, knee, and ankle. MDCT in the extremities is helpful in fracture detection, evaluation, characterization, and treatment planning. The MPR images give excellent structural detail, and the 3-D images help in understanding the spatial relations, which is important for fracture classification and for preoperative planning. MDCT is also helpful in the follow-up of postoperative results, even in the presence of hardware. Tendon injuries can also be evaluated with MDCT.

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Authors and Affiliations

  1. Department of Radiology, University of Iowa Hospitals & Clinics, 200 Hawkins Drive, Iowa City, IA, 52242, USA

    Mats Geijer & Georges Y. El-Khoury

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  1. Mats Geijer
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  2. Georges Y. El-Khoury
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Correspondence to Mats Geijer.

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Geijer, M., El-Khoury, G.Y. MDCT in the evaluation of skeletal trauma: principles, protocols, and clinical applications. Emerg Radiol 13, 7–18 (2006). https://doi.org/10.1007/s10140-006-0509-5

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