Potential indications for and the value of whole-body CT angiography in evaluating patients with blunt polytrauma are discussed, with emphasis on the use of a trauma scoring system, strategies to maximize diagnostic efficiency, and potential pitfalls.

The anatomy of the temporal bone is reviewed and imaging features of pathologic conditions of the temporal bone are presented, with a link to an online CT atlas of normal temporal bone anatomy.

The spectrum of hypervascular lesions in the cirrhotic liver, their MR imaging characteristics, and the difficulty in characterizing small lesions are discussed, with an emphasis on differentiating hepatocellular carcinoma from other hepatic nodules and conditions that mimic hepatic lesions.

The classification of a wide spectrum of unusual primary pelvic retroperitoneal masses seen in adult patients into five distinct subsets on the basis of their anatomic distribution and predominant or characteristic internal features is discussed.

MR imaging features of malignant and borderline tumors arising in ovarian and extraovarian endometriosis are described, and the use of subtraction and diffusion-weighted imaging techniques to differentiate these tumors from other cancers and benign lesions is discussed.

Optimal MR imaging techniques for diagnostic evaluation of the wrist are reviewed, and the advantages of 3 T for visualizing carpal structures are described and illustrated.