A dense reference to possible adverse effects of X-ray examinations; this is best suited for the use and attention of health professionals. Gofman and O'Connor have compiled sound, important information here on the risks of X-ray exposure: principally as a cause of cancer, but birth defects, heritable injuries, and premature aging also have been implicated. They present this all via extensive risk tables for numerable X-ray exams ranging from ankle films after injury to such diagnostic procedures as fluoroscopy, angiography, mammography, dental X-ray, and C.A. T. scans. This is well-organized and well-introduced; the authors take time to banish outright some common misconceptions about X-ray risk. Their conclusion is firm, that ""radiation can induce virtually every major kind of cancer."" Children especially are shown to be at very high risk for X-ray induced damage. This is complicated material, however well presented, and readers will find it rough going. But for those with a particular concern, and certainly for health professionals, it's a serious, well-founded and important alert.