Table 3 Objective image quality.

From: Quantitative and qualitative image quality assessment in shoulder examinations with a first-generation photon-counting detector CT

 

UHR-PCD-CT

Non-UHR-PCD-CT

EID-CT

Full-dose

Low-dose

Full-dose

Low-dose

Full-dose

Low-dose

Image noise [HU]

48.9 ± 7.5

58.6 ± 7.4

40.3 ± 7.2

48.4 ± 7.7

78.2 ± 16.4

97.7 ± 8.0

Signal-to-noise ratio

3.5 ± 1.2

2.9 ± 1.0

4.2 ± 1.5

3.5 ± 1.3

2.2 ± 0.9

1.8 ± 0.7

  1. Signal-to-noise ratios were calculated based on Hounsfield unit measurements in consistent locations within the cancellous bone of the shoulder and adjacent subcutaneous fat. Results are displayed as mean values ± standard deviations.
  2. EID-CT energy-integrating CT, PCD-CT photon-counting CT, UHR ultra-high resolution.
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