Some indication existed of a slight increase in risk after in utero exposure to x rays for all cancers (odds ratio 1.l4, 95% confidence interval 0.90 to 1.45) and leukaemia (1.36, 0.91 to 2.02), but this was not statistically significant.
Our study indicated a slight, non-statistically significant increase in risk after in utero exposure to x rays for all cancers (odds ratio 1.l4, 95% confidence interval 0.90 to 1.45) and leukaemia (1.36, 0.91 to 2.02), particularly acute myeloid leukaemia.
But public concerns about privacy and the potential health effects of repeated exposure to X-rays, for instance, have led many governments to tread carefully.
This method is most suitable for materials containing heavy metals, which are not transparent to X-rays, for example irradiated nuclear fuel and other nuclear materials.
High LET radiations, such as heavy ions or neutrons, have an increased biological effectiveness compared to X-rays for gene mutation, genomic instability and carcinogenesis.
The accelerator can be used in the electron beam mode, or as an X-ray source, or it can be run in a mixed mode where part of electron beam is directed at the object to be irradiated near the surface and the other part is converted to X-rays for deeper penetration.
In each case the evidence for change between samples that had been exposed to X-rays for tomography and their respective control is assessed.
All measurements were carried out in a helium atmosphere with a helium flow rate of 70 centiliters min-1, and the samples were exposed to X-rays for 30 s (instrument settings: main range: 5 s, 6.2 kV, 100 uA, filter blank (no physical filter in the primary beam); low range: 25 s, 6.2 kV, 100 uA, filter blank).
If confirmed, mutation carriers may wish to consider alternatives to X-ray for diagnostic purposes.
If confirmed, mutation carriers may wish to consider alternatives to X-ray for diagnostic purposes, such as magnetic resonance imaging (MRI).
The membranes were then immersed in CDP-Star solution (Roche) for 5 minutes, and placed inside saran wrap for exposure to X-ray film for 30 minutes.
