Question

1 & 2. A is a device placed at x-ray port to absorb low-energy radiation that does not contribute to the diagnostic value of the image and a is a device placed between patient and image receptor to absorb secondary scatter radiation.. 3. Gamma rays have wavelengths that are shorter relative to ultraviolet (UV) rays and would therefore be expected to have Higher or Lower LET values per millimeter of tissue than UV radiation. times greater than 4. In general, CT radiation exposures to the patient are on the order of standard X-ray radiographic examinations of the same area. 5. Most vulnerable period for fetal risk from high level radiation exposure is between 10th day to the week after conception 6. The free radical generated during the radiolysis of cellular water that is generally thought to be the most significant with respect to radiobiological indirect effects is the radical.

Answer 1

1) and 2 filter is device placed at X ray port to absorb low energy radiation and grid is device placed between patient and image receptor to absorb secondary scatter radiation.

3) gamma rays have wavelength shorter than uv rays and therefore have. Higher LET values per millimeter of tissue than uv radiation.

4) CT radiation exposure to patient are on order of. 70 . times greater than standard X ray radiographic examination

) 5) most vulnerable period of fetal risk exposure is from 10 day to.23rd  Week after conception

6) free radical generated during radiolysis of cellular water is oxygen free radical.