Sistema de ejercicios aeróbicos de bajo impacto para mejorar la depresión genérica del adulto mayor entre 70 y 85 años de edad.

Abstract

The first edition of this book was published in 1984. Until the fourth edition, published in 2010, I was its sole author. As I planned for the fifth edition, I felt the need to add a co-author who would have the right qualifications, experience, and interest to collaborate with me in bringing this book to the current state of the art. I am delighted to have Dr. John Gibbons on board. John and I have made chapter-by-chapter revisions of the fourth edition in light of new developments in the field. These revisions included additions and subtractions wherever nec -essary, to make the text more precise and the topics more relevant to the needs of both the student and the practitioner. New sections and/or discussions were added to cover subjects that have received the most attention in the past few years, for example, Image-Guided Radiation Therapy (IGRT), Volumetric-Modulated Arc Therapy (VMAT), Stereotactic Body Radiotherapy (SBRT), and Failure Mode Event Analysis (FMEA) approach to quality assurance. A new chapter has been added to cover SBRT in greater detail. New color illustrations have also been added throughout to update the book’s usefulness. A website with full text and an image bank accom -pany the book for greater convenience in studying and teaching. The first edition was inspired by my desire to write a book for the radiotherapy team: radiation oncologists, medical physicists, dosimetrists, and therapists. The audience for the fifth edition remains the same. I believe the reason this book has succeeded with this mixed audience is the clinical relevancy of the material, which forms a common interest for all these profes -sionals. It is a reference book for the practitioners, a textbook for the students, and a constant companion for those preparing for their board examinations. I acknowledge Jonathan Pine, the Senior Executive Editor; Emilie Moyer, the Senior Product Manager; and other editorial staff of Lippincott Williams & Wilkins for their valuable contribu -tions in making this publication possible. Finally, I greatly appreciate my wife, who is truly the love of my life.