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. 2022 May 3;24:100459. doi: 10.1016/j.lanwpc.2022.100459

Table 2.

Carbon emissions for each imaging modality, kg CO2e/scan.

Attributional LCA per scan (mean)
 Consequential LCA per additional scan
Total CO2e/No. of tests ordered (i.e. average)
 Additional CO2e used for one more scan
MRI CT CXR US MRI CT CXR US
Average scan time 27 min 8 min 2 min 20 min 27 min 8 min 2 min 20 min
Consumables 1·0 1·1 0·74 0·07 0·8 1·02 0·58 0·084
Electricity 16·5 8·1 0·02 0·46 0·3 0·07 0·002 0·002
Total 17·5 9·2 0·76 0·53 1·1 1·09 0·58 0·09