European Association of RadiologyEuropean Congress of RadiologyEuropean Coordination Committee of the Radiological and Electromedical Industry

Within Consistent Presentation of Images (CPI) a number of transactions is specified that maintain the consistency of presentation for grayscale images and their presentation state information (including user annotations, shutters, flip/rotate, display area, and zoom). This profile also defines a standard contrast curve, the Greyscale Standard Display Function, against which different types of display and hardcopy output devices should be calibrated. It thus supports hardcopy, softcopy and mixed environments.

IHEIntegration ProfilesConsistent Presentation of Images

Reporting Radiologist Referring Physician orReviewing Radiologist

Presentation StatePresentation LUT

Grayscale Standard

Original Image

Window Level

Flip

Zoom

Area Of

Interest

Annotate

WithoutConsistent Presentation

AchievingConsistent Presentation

Area Of

Interest

.01

.1

1

10

100

1000

0 200 400 600 800 1000

Grayscale Standard Display Function

JND Index

Monitor’s Capability

Jmax == P-Value of 2n-1

Jmin == P-Value of 0

Minimum Luminance+ Ambient Light

Maximum Luminance+ Ambient Light

.01

.1

1

10

100

1000

0 200 400 600 800 1000

Grayscale Standard Display Function

JND Index

Same number of Just Noticeable Difference == Same perceived contrast

Despite different changein absolute luminance