Most common garter snakes have a pattern of yellow stripes on a brown or green background, and their average total length (including tail) is about 55 cm (22 in), with a maximum total length of about 137 cm (54 in). The average body mass is 150 g (5.3 oz).
Centigray is a radiation absorbed dose measurement unit. A centigray (cGy) is a derived metric (SI) measurement unit of absorbed radiation dose of ionizing radiation, e.g. X-rays. The SI prefix centi stands for one hunfredths.
Using a noise threshold of 20 HU and a dose threshold of 2.5 cGy, a range of imaging parameters was established for each circumference from which technique optimization curves were created to determine optimal mAs and kVp pairs.The mean measured dose was 2.435 Â± 0.019 cGy. The mean measured noise was 29.35 Â± 1.45 HU.BJECTIVE: The objective of our study was to determine the effect of mAs and kVp reduction on pediatric phantoms based on patient circumference to optimize dose reduction and maintain image quality for abdominal CT.