Completely updated to reflect revolutionary changes in technology and practice, the Fourth Edition of this best-selling reference features state-of-the-art coverage of multislice CT scanners and three-dimensional imaging, plus a new chapter on the acute abdomen and new material on CT and MR angiography, lung cancer screening, pulmonary embolism, coronary artery calcium screening, and interventional CT techniques including radiofrequency ablation and CT fluoroscopy. More than 5,000 illustrations mostly new 3D and multiplanar images complement the text. Each organ system chapter demonstrates imaging techniques, normal CT/MRI anatomy, and pathologic findings. The authors indicate where MRI complements or supplements CT or has supplanted CT as the primary imaging modality.