What is the dose of ionizing radiation for a head CT, 120KV,190MA,10s?

Hello! I am from Shanghai Fudan University Hospital. Generally speaking, the effective radiation dose of head CT examination is about 2mSv. For the whole body effective dose, 2mSv is relatively low in ct examination. For the whole body effective dose, 2mSv is relatively low in ct examination, because the general: chest ct - 8mSv; abdomen ct - 10mSv; pelvis ct - 10mSv. For the advanced ct machines configured in recent years have automatic mAs settings and the amount of exposure according to the shape of the human body. So the effective dose due to each part can have a 20-30% or higher percentage reduction. In your case, the 2mSv caused by the head ct should speak lower. However, don't let this put you off (of course this statement should be addressed to hospital workers), note that 2mSv is the value converted to a whole-body dose, but cranial ct generally has a direct exposure to the crystalline lens of the eye, which has been reported in the literature to have a localized dose equivalent of 50mGy. This is the same as the absorbed dose threshold (500mGy) reported by the ICRP Recommendation to cause clouding of crystalline lens of the eye. Absorbed dose threshold (500mGy). Although the absorbed dose to the crystalline lens from a single head CT is only 1/10th of the dose, the dose is a cause for concern, considering that the patient may undergo multiple CT examinations of the same area. So the dose is of concern. For unnecessary CTs, repeat CTs should ask the hospital if they are really necessary. Remember, everyone has the right not to accept a doctor's recommendation. To do imaging, if possible, prioritize radiation free MRI. those who do need CT scan, that can't be helped, after all, the condition requires it. I hope my answer can clear your doubts.