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Table 1 Four categories for qualitative image quality assessment. (A) overall diagnostic image quality (range 0–3), (B) sequence-related artifact (7 criteria range 0–3, maximum total score 21), (C) patient related artifact (2 criteria with range 0–3, total maximum score 6) and (D) perceived signal-to-noise ratio (SNR) (range 0–3). (B) Score for sequence related artifact relates to total number of slices acquired (artifact present in 1, 2 or 3 slices would score 1, 2 and 3 respectively for 3 slice balanced steady state free precession (bSSFP); artifact present in 1–2, 3–4 or 5–6 slices would score 1, 2 and 3 respectively for 6-slice SMS)

From: Simultaneous multi slice (SMS) balanced steady state free precession first-pass myocardial perfusion cardiovascular magnetic resonance with iterative reconstruction at 1.5 T

Qualitative Criteria for perfusion Imaging
  0 1 2 3 maximum score
A. Overall Diagnostic Image Quality
  poor image quality and non-diagnostic major artifact present but not limiting diagnosis minor artifact present but not limiting diagnosis excellent 3
      3
B. Sequence related artifact
Wrap around none 1 slice 2 slices 3 slices 3
Respiratory ghosting none 1 slice 2 slices 3 slices 3
Cardiac ghosting none 1 slice 2 slices 3 slices 3
Image blurring none 1 slice 2 slices 3 slices 3
Metallic artifact none 1 slice 2 slices 3 slices 3
Banding artifact none 1 slice 2 slices 3 slices 3
Cardiac Motion none 1 slice 2 slices 3 slices 3
      21
C. Patient / equipment related artifact
Breathing motion none minor artifact present but not limiting diagnosis major artifact present but not limiting diagnosis non-diagnostic 3
ECG mistriggers none 1 mistriggers 2 mistriggers >  2 mistriggers 3
      6
D. Perceived Signal-to-Noise Ratio (SNR)
  very poor SNR non-diagnostic image quality minor noise present but not limiting diagnosis major noise present but not limiting diagnosis high SNR with excellent image quality 3
      3