## 3 Results
### TA of SR
Based on the rotated component matrix, the contrast (0.933), softness (0.936), and skewness (\(-0.926\)) indices were determined as suitable indices to evaluate the SR. Their suitability is demonstrated via the graphs in Figure 6. As a result, the mean values of contrast, softness, and skewness  
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**MF** & **Model** & **CC** & **Brightness 1** & **Contrast 1** & **Softness 1** & **Skewness 1** & **Uniformity 1** & **Randomness 1** \\ \hline \multirow{4}{*}{Siemens} & AS & 0.02 & 127.65 \(\pm\) 2.02 & 30.56 \(\pm\) 1.60 & 0.0146 \(\pm\) 0.0016 & 0.0024 \(\pm\) 0.0125 & 0.0533 \(\pm\) 0.0018 & 4.4426 \(\pm\) 0.0453 \\  & AS+ & 0.02 & 125.26 \(\pm\) 4.65 & 30.53 \(\pm\) 1.40 & 0.0141 \(\pm\) 0.0013 & 0.0014 \(\pm\) 0.0153 & 0.0568 \(\pm\) 0.0022 & 4.3486 \(\pm\) 0.0588 \\  & EDGE & 0.02 & 125.06 \(\pm\) 5.16 & 30.58 \(\pm\) 1.54 & 0.0142 \(\pm\) 0.0014 & 0.0022 \(\pm\) 0.0076 & 0.0573 \(\pm\) 0.0011 & 4.3382 \(\pm\) 0.0249 \\  & \(p\)-value * & 0.047 & 0.996 & 0.760 & 0.887 & 0.001 & - & -0.001 \\  & CT750 HD & 0.015 & 159.79 \(\pm\) 3.52 & 28.94 \(\pm\) 1.11 & 0.0127 \(\pm\) 0.0010 & \(-\)0.2475 \(\pm\) 0.0344 & 0.0367 \(\pm\) 0.0004 & 5.0496 \(\pm\) 0.0111 \\ GE & VCT4C & 0.015 & 135.61 \(\pm\) 2.79 & 29.91 \(\pm\) 1.01 & 0.0136 \(\pm\) 0.0009 & \(-\)0.0621 \(\pm\) 0.0050 & 0.0419 \(\pm\) 0.0077 & 4.8016 \(\pm\) 0.0215 \\  & \(p\)-value * & 0.001 & 0.084 & 0.084 & 0.001 & \(<\)0.001 & \(<\)0.001 \\  & IQQm & 0.015 & 125.04 \(\pm\) 3.01 & 28.73 \(\pm\) 1.58 & 0.0122 \(\pm\) 0.0013 & \(-\)0.0363 \(\pm\) 0.0180 & 0.0362 \(\pm\) 0.0004 & 5.0213 \(\pm\) 0.0190 \\ \multirow{4}{*}{Philips} & Brillinger & 0.02 & 115.10 \(\pm\) 5.44 & 30.04 \(\pm\) 1.28 & 0.0145 \(\pm\) 0.0164 & 0.2210 \(\pm\) 0.0634 & 0.0388 \(\pm\) 0.0012 & 4.9402 \(\pm\) 0.0534 \\  & \(p\)-value * & 0.001 & 0.061 & 0.055 & 0.001 & \(<\)0.001 & \(<\)0.001 \\  & GENESIS & 0.02 & 123.95 \(\pm\) 2.69 & 28.83 \(\pm\) 1.05 & 0.0126 \(\pm\) 0.0009 & 0.0170 \(\pm\) 0.0043 & 0.0425 \(\pm\) 0.0002 & 4.7843 \(\pm\) 0.0051 \\ Canon & Aquillon CX & 0.015 & 122.20 \(\pm\) 2.98 & 28.99 \(\pm\) 1.16 & 0.0130 \(index were 29.09 \(\pm\) 0.28, 0.0128 \(\pm\) 0.0002, and \(-\)1.6832 \(\pm\) 0.0477, respectively. Here, the skewness index close to 0 represents an image with a symmetrical image. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**MF** & **Brightness** & **Contrast** & **Softness** & **Skewness** & **Uniformity** & **Randomness** \\ \hline Siemens * & 235.24 \(\pm\) 1.00 & 29.45 \(\pm\) 0.43 & 0.0132 \(\pm\) 0.0004 & \(-\)1.6360 \(\pm\) 0.0705 & 0.1127 \(\pm\) 0.0052 & 4.2739 \(\pm\) 0.0540 \\ GE * & 241.08 \(\pm\) 0.36 & 28.76 \(\pm\) 0.45 & 0.0126 \(\pm\) 0.0004 & \(-\)1.6606 \(\pm\) 0.0765 & 0.1368 \(\pm\) 0.0067 & 3.8993 \(\pm\) 0.0441 \\ Philips * & 238.79 \(\pm\) 0.84 & 29.08 \(\pm\) 0.54 & 0.0128 \(\pm\) 0.0005 & \(-\)1.6903 \(\pm\) 0.0885 & 0.1046 \(\pm\) 0.0038 & 4.2339 \(\pm\) 0.0644 \\ Canon * & 238.80 \(\pm\) 0.86 & 29.06 \(\pm\) 0.47 & 0.0128 \(\pm\) 0.0004 & \(-\)1.7464 \(\pm\) 0.0826 & 0.0926 \(\pm\) 0.0035 & 4.3578 \(\pm\) 0.0447 \\ Distorted data * & 235.26 \(\pm\) 2.09 & 31.72 \(\pm\) 1.36 & 0.0153 \(\pm\) 0.0013 & \(-\)1.8544 \(\pm\) 0.1293 & 0.0882 \(\pm\) 0.0107 & 4.5971 \(\pm\) 0.1361 \\ _p_-value * & \(<\)0.001 & \(<\)0.001 & \(<\)0.001 & \(<\)0.001 & \(<\)0.001 & \(<\)0.001 \\ \hline \hline \end{tabular}  
* These are the mean values of appropriate images acquired with the different CT scanner models of the same manufacturer. + These are the mean values of distorted images acquired with the different CT scanner models of all manufacturers. + Two-tailed, independent two-sample \(t\)-test. All texture analysis (TA) values are provided as the mean \(\pm\) standard deviation. CT, computed tomography; MF, manufacturer.  
\end{table} 
Table 4: Texture analysis (TA) of appropriate and distorted spatial resolution (SR) images for computed tomography (CT) scanners by different manufacturers.