Eizo FLEXSCAN MX190 User Manual download pdf (Page 86)

RadiCS

Chapter 10 Information

English

Grayscale Check

ACR includes an equality sign but RadiCS doesn’t because the target error rate is < 10% of GSDF.

This is a judgment condition for DICOM Part 14 GSDF. The number of grayscale measuring points

is ﬁxed at 18 and is unchangeable. The measurement result is 17 points because it is expressed as

(JNDn + 1 – JNDn) / 2.

Uniformity Check

ACR includes only a notation about chromaticity uniformity of

(u’, v’). However, since it is

considered necessary to check luminance uniformity as well, RadiCS adds judgment conditions for

luminance uniformity. These are identical to AAPM in content. See the AAPM item for details of the

correlation with RadiCS.

Sensors

ACR contains nothing in particular about sensors or measuring devices. Since this standard was

compiled using AAPM as a reference, sensors are handled in the same manner as AAPM. See the

AAPM item for details of the correlation with RadiCS.

Multiple Monitors

ACR includes a determination for multiple monitors (note: chromaticity determination only, none

for luminance), but by default RadiCS is set not to make such a determination. If necessary, make

settings as indicated in the table above. ACR includes an equality sign but RadiCS does not.

Cautions

ACR is an educational tool to supply physicians, technicians, and physicists with extensive

knowledge related to digital mammography image quality. It is not an implementation standard, a list

of essential requirements, or a quality control standard. For this reason it does not cover the concepts

of acceptance tests or constancy tests. Nevertheless, as a supporter of the ACR guidelines, we offer

a more practical approach, supplementing the deﬁciencies related to quality control by referring to

AAPM, which is frequently mentioned in ACR.

IEC, JIS

RadiCS Setup

Constancy Test

Primary

Pattern Check Black

Test Pattern 1

Test Pattern 2

Test Pattern 3

Test Pattern 4

Luminance Check

L’max < 20% baseline value xxx cd/m

L’max < 25% baseline value xxx cd/m

Lamb < 25% baseline value xxx cd/m

Grayscale Check

Uniformity Check

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