YY/T 0482-2022Magnetic resonance equipment for medical imaging—Determination of essential image quality parameters (English PDF)

National Standard of the People's Republic of China

Replacing

YY/T 0482-2010

Issued by: National Medical Products Administration of the People's Republic of China

Contents

• 1 Scope
• 2 Normative references
• 3 Terms, definitions, symbols and abbreviated terms
• 4 Procedures for the determination of the main image parameters
• 4.1 General requirements of the measuring procedure
• 4.2 Signal to noise ratio
• 4.3 Uniformity
• 4.4 Slice thickness of a two dimensional scan
• 4.5 Two dimensional geometric distortion
• 4.6 Spatial resolution
• 4.7 Ghosting
• 5 Stability test
• 5.1 Purpose and principle
• 5.2 Requirements for the test phantom
• 5.3 Scanning characteristics
• 5.4 Measuring procedure
• 5.5 Data analysis, reporting of the results and tolerances
• Annex A (normative) Alternative methods
• Annex B (informative) Basic principles
• Bibliography
• Figure 1 Signal intensity profile in the inclined plate method
• Figure 2 Correction of the rotation of the test phantom (the broken line shows the position of the opposite plate)
• Figure 3 Example of a test phantom for a spherical specified region volume (two of the lines pass through the centre)
• Figure 4 Example of a fiducial marker test phantom for a spherical specified region volume
• Figure 5 Measurement of the radius
• Figure 6 Periodic pattern
• Figure 7 Image of the periodic pattern and position of the ROI for a coronal scan
• Figure 8 Image of the periodic pattern and position of the ROI for transverse and sagittal scans
• Figure 9 Sample image of the test phantom and of the ROI for the measurement of signal, ghost and noise