Much to the dismay of patients and physicians, cancer stem cells — tiny powerhouses that generate and maintain tumor growth in many types of cancers — are relatively resistant to the ionizing radiation often used as therapy ...

Medicine & Health - Cancer

Feb 04, 2009 5 / 5 (6) 2

At the radiation dose levels used in cardiac imaging exams, such as cardiac CT or nuclear medicine scans, the risk of potentially harmful effects from ionizing radiation are low. However, since the exact level of risk is ...

Medicine & Health - Other

Feb 02, 2009 4 / 5 (1) 0