Imaging appearances of complications of hepatic RF ablation related to electrode placement or thermal injury, as well as other complications and treatment failures, are discussed, with emphasis on strategies for their reduction or minimization.

Percutaneous cryoablation is an effective choice for minimally invasive nephron-sparing treatment of renal tumors, and knowledge of normal and abnormal postablation findings is essential for optimal follow-up imaging.

Historical and current management of penetrating injuries to the neck is reviewed, and the role of imaging in evaluation of penetrating neck injuries and their imaging appearances are presented, with a special focus on multidetector CT angiography.

The management of acute traumatic aortic injuries is reviewed, and normal and abnormal findings seen at follow-up CT after both endovascular repair and surgical repair are described.

The principles underlying dual-energy CT techniques and applications of dual-energy CT in the abdomen and pelvis are discussed.

The US, CT, and MR imaging features of intra- and extraperitoneal nonovarian cystic lesions are discussed, as well as normal female pelvic anatomy.