NEMA MS 3:2008 (R2014)
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Determination of Image Uniformity in Diagnostic Magnetic Resonance Images
24-04-2023
31-03-2021
Preamble
Foreword
Rationale
Scope
Section 1 - DEFINITION
1.1 Measurement Region of Interest (MROI)
1.2 Measurement Subregion of Interest (SROI)
1.3 Image Non-uniformity
1.4 Normalized Absolute Average Deviation
1.5 Peak Deviation Non-uniformity
1.6 Gray-Scale Uniformity Map
1.7 Maximum Selectable Volume
1.8 Specification Volume
1.9 Specification Area
Section 2 - METHODS OF MEASUREMENT
2.1 Test Hardware
2.1.1 Size of the Signal Producing Volume
2.1.2 MR Characteristics of the Signal Producing Volume
2.2 Scan Conditions
2.3 Measurement Procedure
2.3.1 Pre-processing of the Image
2.3.2 Peak Deviation Non-uniformity
2.3.3 Gray-Scale Uniformity Map
2.3.4 ACR MR Accreditation Program (ACR-MRAP) Uniformity
2.3.5 Normalized Absolute Average Deviation Uniformity
Section 3 - SOURCES OF ERROR AND REPORTING OF RESULTS
3.1 Sources of Error
3.2 Reporting of Results
3.2.1 Scan Parameters
Annex A - CHANGES TO STANDARD
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