PET-CT has the great advantage of combining anatomical and functional imaging within a single study. The benefits within the context of modern radiation oncology practice include more accurate staging and more precise target definition. Furthermore, PET-CT assists in the evaluation of treatment response, the detection of early failures, and assessment of long-term prognosis. This comprehensive book explains in detail the opportunities that exist to exploit PET-CT in staging, radiation treatment planning, assessment of response, and surveillance. In addition to discussing the many potential benefits of PET-CT, pitfalls are carefully examined. The numerous high-quality images document not only the findings characteristic in diverse disease settings but also normal variants and physiological uptake for different disease sites and treatments. This book is expected to serve as the definitive text on the application of this exciting imaging modality within radiation oncology.