Published online by Cambridge University Press: 23 December 2009
Introduction
Radiation therapy has played a significant role in the management of prostate cancer for over half a century. High-energy megavoltage linear accelerators developed in the 1950s provided deeper penetration of tumoricidal dose, superficial tissue sparing and hence lower morbidity profiles than earlier models. The introduction of the CT scanner and complex computer-based treatment planning software in the 1980s improved three-dimensional target localization and enhanced accuracy. Subsequently, intensity-modulated treatment planning capabilities enabled highly conformal dose escalation for improved outcomes without added toxicity. New image-guidance techniques have further refined treatment delivery by compensating for internal organ variability. Concurrent with vast improvements in external beam radiation therapy, modern brachytherapy methods, facilitated by dynamic imaging, have become sophisticated and popular techniques for primary as well as salvage therapies. In addition, refinement of prognostic factors, particularly prostate-specific antigen (PSA), and contemporary imaging for staging have substantially improved patient selection for individualized therapy.
Today, modern radiotherapeutic approaches rely on accurate staging, precise imaging, and prognostic prediction, as well as technical advances in dose delivery and normal tissue protection.
Imaging for patient selection and radiation treatment planning
An accurate staging assessment prior to definitive therapy is critical in order to maximize cure rates. Prognostic risk factors including American Joint Commission on Cancer (AJCC) stage, Gleason score and pre-treatment PSA assess the risk of disease beyond the prostate, predict the yield of diagnostic studies, and guide radiotherapeutic decision-making.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.