Natural radioactivity (NR) is an ubiquitous phenomenon and exhibits large geographic variations. Recommended risk models for radiation-induced leukaemia prediction, which are issued from the Life Span Study (LSS) of Hiroshima and Nagasaki A-bomb survivors, suggest that NR could induce some leukaemia cases. This work estimates the percentage of childhood leukaemia that might be related to 3 sour...

PURPOSE To compare radiation doses and lifetime attributable risks (LARs) of radiation-induced cancer incidence and mortality from breast imaging studies involving the use of ionizing radiation. MATERIALS AND METHODS Recent literature on radiation doses from radiologic procedures and organ doses from nuclear medicine procedures, along with Biologic Effects of Ionizing Radiation (BEIR) VII age...

BACKGROUND The seventh Committee on "Biological Effects of Ionizing Radiation" (BEIR VII, 2006) underlines "the need of studies of infants who are exposed to diagnostic radiation because catheters have been placed in their hearts". OBJECTIVE To determine the lifetime attributable risk (LAR) of cancer associated with the estimated cumulative radiological dose in 59 children (42 male, age 2.8+/...

Background: This study aimed to estimate and compare the absorbed dose, lifetime cancer risk and mortalities due to cone-beam computed tomography (CBCT) and panoramic examinations on patients. Materials and Methods: The exposure factors were applied to 332 patients in two age groups (6-10, and ˃18-year-old). The dose-area product (DAP) values were measured for CBCT and panoramic radiographies. ...

CONTEXT Computed tomography coronary angiography (CTCA) has become a common diagnostic test, yet there are little data on its associated cancer risk. The recent Biological Effects of Ionizing Radiation (BEIR) VII Phase 2 report provides a framework for estimating lifetime attributable risk (LAR) of cancer incidence associated with radiation exposure from a CTCA study, using the most current dat...

background: factor vii concentrates are used in patients with congenital or acquired factor vii deficiency or treatment of hemophilia patients with inhibitors. in this research, immunoaffinity chromatography was used to purify factor vii from prothrombin complex (prothrombin-proconvertin-stuart factor-antihemophilic factor b or ppsb) which contains coagulation factors ii, vii, ix and x. the aim...

"When one admits that nothing is certain one must, I think, also admit that some things are much more nearly certain than others." Bertrand Russell (1872-1970) Computed tomography (CT) is one of the largest contributors to man-made radiation doses in medical populations. CT currently accounts for over 60 million examinations in the United States, and its use continues to grow rapidly. The princ...