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Details of the four software programs used in this study.
| Software | Company | Processing system | Manufacturing Address | Background ROI definition |
|---|---|---|---|---|
| AN | Alfanuclear | Data and Image Processor IM512P, version 2.0 [31] | Argentina | Manually drawn background ROI |
| SM | Siemens | Syngo workstation [32] | Germany | Automatically selected background ROI. |
| GE-X | General Electric | Xeleris [33] | United States | Automatically selected background ROI. |
| M-TT | Mediso | Tera-Tomo, version 3.07 [34] | Hungary | Manually drawn ROIs |
