Table 2.

Mean values with standard deviation (SD) for image sharpness on EID, PCCT (QIR−) and PCCT (QIR+) images of enlarged lesions and the whole lung using a 5-point Likert scale as well as their associated p-values. Mean values are based on the rating on the Likert scale assessed by the readers (1—deficient, 2—sufficient, 3—satisfactory, 4—good, 5—very good). Statistical significance was assumed for p-values < 0.05.

	EID	PCCT (QIR−)	PCCT (QIR+)	Stat. Significance (p)
	Mean SD	Mean SD	Mean SD	EID vs. PCCT (QIR−)	EID vs. PCCT (QIR+)	PCCT (QIR−) vs. PCCT (QIR+)
Lesion	3.3 ± 1.1	3.6 ± 0.8	3.9 ± 0.8	0.001	<0.001	0.020
Whole Lung	3.9 ± 0.9	4.1 ± 0.7	4.2 ± 0.8	0.236	0.014	0.167