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The procedure radiologists use to alter the amount of radiation exposure on a patient weighing on their clinical signs is called AEC. 

98 patients were scanned by the AEC procedure,taking into account the patient's age, weight and other medical signs at Massachusetts General Hospital in Boston, MA.

Outcomes reflected that contouring of chest CT Scans acted with AEC adapted to a patient’s age, weight, and clinical indication resulted in a 6 to 20 % reduction in radiation dose when compared to the previous weight-based AEC protocols and a 40 to 50 percent reduction when compared to fixed scans without AEC. 

“AEC helps in individualizing the scan protocols for every patient depending on patient size. Thus, every patient gets scanned at a radiation dose that is appropriate for them,” said Dr.Prakash, the lead author of the study.. 

This study was presented in ARRS 2010