Deep learning-based fully automated Z-axis coverage range definition from scout scans to eliminate overscanning in chest CT imaging

Salimi, Yazdan; Shiri, Isaac; Akhavanallaf, Azadeh; Mansouri, Zahra; Saberi Manesh, Abdollah; Sanaat, Amirhossein; Pakbin, Masoumeh; Askari, Dariush; Sandoughdaran, Saleh; Sharifipour, Ehsan; Arabi, Hossein; Zaidi, Habib

doi:10.1186/s13244-021-01105-3

Insights into Imaging

Table 3 The error and difference between the lung segment and the scan range selected by the technologist (Human) and DL network

From: Deep learning-based fully automated Z-axis coverage range definition from scout scans to eliminate overscanning in chest CT imaging

Center	Superior error (mm)				Inferior error (mm)
Center	Human	Deep AP	Deep Lateral	Deep Both	Human	Deep AP	Deep Lateral	Beep Both
C1	16.9 ± 7.9	− 0.3 ± 1.7	0.7 ± 2.2	− 0.1 ± 1.0	41.7 ± 35.5	2.3 ± 9.5	− 2.46 ± 9.9	− 1.5 ± 5.5
C2	6.3 ± 2.2	− 0.1 ± 0.5	− 0.1 ± 0.6	− 0.1 ± 0.3	5.3 ± 4.5	0.4 ± 1.6	− 0.54 ± 0.8	− 0.1 ± 0.6
C3	33.3 ± 19.7	− 0.3 ± 3.4	− 0.6 ± 3.8	0.1 ± 1.9	55.2 ± 32.7	0.0 ± 10.7	− 7.36 ± 10.2	− 2.4 ± 6.8
C4	29.2 ± 11.6	0.0 ± 2.2	− 0.2 ± 2.6	− 0.1 ± 1.5	34.2 ± 22.3	1.0 ± 8.5	− 3.06 ± 6.8	− 1.5 ± 4.8
C5	26.2 ± 12.6	0.4 ± 2.2	1.0 ± 3.0	0.3 ± 1.8	43.7 ± 22.6	3.8 ± 9.3	− 1.96 ± 7.0	− 0.2 ± 4.3
C6	33.1 ± 12.9	− 0.3 ± 2.6	− 0.8 ± 2.9	− 0.5 ± 1.7	41.3 ± 21.1	2.3 ± 10.7	− 3.06 ± 5.5	− 1.3 ± 3.9
C7	29.6 ± 10.3	− 0.1 ± 2.7	0.4 ± 2.9	0.1 ± 1.9	34.8 ± 23.6	0.3 ± 7.5	− 2.66 ± 5.4	− 1.8 ± 4.1
C8	21.7 ± 10.2	0.1 ± 2.5	0.5 ± 2.8	0.1 ± 1.7	22.1 ± 16.0	0.9 ± 5.7	− 3.76 ± 7.1	− 1.3 ± 3.0
C9	26.0 ± 9.2	− 0.4 ± 3.1	− 0.7 ± 3.7	− 0.3 ± 2.2	38.1 ± 21.0	3.8 ± 11.1	− 3.36 ± 6.9	− 0.9 ± 4.1
C10	23.7 ± 12.3	− 0.2 ± 1.7	− 0.3 ± 1.6	− 0.1 ± 0.9	39.7 ± 28.0	0.9 ± 7.4	− 2.06 ± 5.9	− 1.4 ± 2.9
D1	29.7 ± 13.4	0.3 ± 1.8	0.5 ± 2.1	0.2 ± 1.3	26.0 ± 19.8	0.3 ± 7.1	− 3.36 ± 5.9	− 1.1 ± 3.9
D2	36.1 ± 12.8	− 0.3 ± 2.5	0.2 ± 3.9	− 0.2 ± 1.5	40.8 ± 24.8	0.3 ± 7.4	− 3.26 ± 6.1	− 1.3 ± 3.8
D3	21.9 ± 10.4	− 0.2 ± 1.6	0.7 ± 2.5	0.0 ± 1.0	39.3 ± 38.2	− 1.2 ± 08	− 2.96 ± 11.3	− 2.0 ± 4.4
C9-Scout view	26.0 ± 9.2	− 0.7 ± 4.08			38.1 ± 21.0	0.01 ± 14.97
C8-Scout view	21.7 ± 10.2	− 1.0 ± 3.20			38.1 ± 21.0	0.0 ± 9.40
C4-Scout view	29.2 ± 11.6	0.3 ± 5.80			34.2 ± 22.3	0.1 ± 10.60

The bolded cells reflect the results of delimitation by means of AP projections for the same centers where AP scout-views
The negative values indicate missing the lung, whereas the positive values indicate overscanning. The last row is for the results of fine-tuning the network on AP scout-view images for center C9

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