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Table 3: Qualitative assessment of image quality, based on average ratings of 2 readers (N = 64 subjects)
MBIR ASiR Difference (MBIR-ASiR)
Mean (95% CI) Mean (95% CI) Mean (95% CI) P Value^{^a}
Nasopharynx 4.80 ± 0.26 (4.74–4.87) 4.16 ± 0.31 (4.08–4.23) 0.65 ± 0.30 (0.57–0.72) <.001
Oropharynx 3.74 ± 0.60 (3.59–3.89) 3.08 ± 0.64 (2.92–3.24) 0.66 ± 0.37 (0.56–0.75) <.001
Vocal cord 3.73 ± 0.53 (3.59–3.86) 4.02 ± 0.37 (3.92–4.11) −0.29 ± 0.53 (−0.42 to −0.16) <.001
SC junction 3.41 ± 0.48 (3.29–3.53) 3.75 ± 0.25 (3.69–3.82) −0.34 ± 0.52 (−0.47 to −0.21) <.001
Overall IQ 3.85 ± 0.32 (3.77–3.93) 3.69 ± 0.28 (3.62–3.76) 0.17 ± 0.31 (0.09–0.24) <.001
Note:—SC indicates sternoclavicular; IQ, image quality.
↵a Wilcoxon signed ranked test.

	MBIR		ASiR		Difference (MBIR-ASiR)
	Mean	(95% CI)	Mean	(95% CI)	Mean	(95% CI)	P Value^{^a}
Nasopharynx	4.80 ± 0.26	(4.74–4.87)	4.16 ± 0.31	(4.08–4.23)	0.65 ± 0.30	(0.57–0.72)	<.001
Oropharynx	3.74 ± 0.60	(3.59–3.89)	3.08 ± 0.64	(2.92–3.24)	0.66 ± 0.37	(0.56–0.75)	<.001
Vocal cord	3.73 ± 0.53	(3.59–3.86)	4.02 ± 0.37	(3.92–4.11)	−0.29 ± 0.53	(−0.42 to −0.16)	<.001
SC junction	3.41 ± 0.48	(3.29–3.53)	3.75 ± 0.25	(3.69–3.82)	−0.34 ± 0.52	(−0.47 to −0.21)	<.001
Overall IQ	3.85 ± 0.32	(3.77–3.93)	3.69 ± 0.28	(3.62–3.76)	0.17 ± 0.31	(0.09–0.24)	<.001