Evaluation of a new acrylic-lead shielding device for peripheral dose reduction during cone-beam computed tomography.

Jia et al measured the peripheral dose from an MV-CBCT system and concluded that the peripheral dose due to MV-CBCT imaging might be significant during the daily application of the MV-CBCT procedure. 15 Perks et al found doses of >1 cGy per scan outside the CBCT imaged volume. 16 Apart from the IGRT dose, some studies reported that low radiation dose was associated with the onset of cataracts, thyroid diseases, azoospermia, loss of ovarian function, and oocyte death. 17–22 Su et al indicated that the population exposed to low-dose-rate environmental radiation throughout their lives were highly at risk of cortical and posterior subcapsular lens opacification.

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