TABLE 9.

Results of image quality assessment using American College of Radiology (ACR) testing recommendations

	T1‐weighted	T2‐weighted	Tolerance
Geometric accuracy	<1 mm	<1 mm	<±2 mm
Slice position accuracy	1.8 mm	1.9 mm	−5 mm < x < 5 mm
Slice thickness	4.8 mm	4.7 mm	5 ± 0.7 mm
PIU	91.4%	91.8%	>87.5%
PSG	0.0012	0.0014	≤0.025
HCSR	0.9	0.9	≤1
LCD	28	22	>9

Abbreviations: HCSR, high‐contrast spatial resolution; LCD, low‐contrast detectability; PIU, percent integral uniformity; PSG, percent signal ghosting.