EI – Exposure Index...펌

EI – Exposure Index
Exposure index (EI) is the measure of the amount of exposure received by the
image receptor (IR). It is dependent on mAs, total detector area irradiated, and
beam attenuation. The exposure index is indicative of the image quality. EI is
derived from the mean detector entrance exposure which is in turn derived from
the mean pixel value of the image. Although EI is always derived from the IR
exposure, equipment manufacturers calculate the numeric value differently,
resulting in different ranges and definitions.

 

1500 -1800이 적당... Kodak CR.  아마도 Fire CR도.

1900-2500  FIre CR 중앙담당자얘기.