Go for X-ray first, avoid CT scans in mild Covid cases, says AIIMS director Dr Randeep Guleria Go for X-ray first, avoid CT scans in mild Covid cases, says AIIMS director Dr Randeep Guleria All India Institute of Medical Sciences (AIIMS) Director Dr Randeep Guleria on Monday said that unnecessary CT scans should be avoided in all mild Covid-19 cases. advertisement UPDATED: May 3, 2021 21:06 IST AIIMS Director Dr. Randeep Guleria also said that CT scan is equivalent to 300-400 chest X-rays which increases the risk of having cancer in later life, especially in youth, as one is exposed to harmful radiation. (Photo: Getty Images)