Erratum to latest CT technologies in lung cancer screening: protocols and radiation dose reduction

This article that appeared on Page: 1154-1164, Vol 10, No 2 (February 2021) Issue of Translational Lung Cancer Research (TLCR) (1), unfortunately contained a mistake in table 2 for rotation time. The corrected version of Table 2 is presented here (Table 2).

Table 2. International radiological society’s CT protocol guidelines.

	ACR – STR [Kazerooni et al. 2019 (31); ACR 2014 (32)]	ESTI [Revel et al. ESTI 2019 (33)]
CT system type	≥16 MDCT	≥32 MDCT, ≥64 prefered
Rotation time	≤750 ms	≤500 ms
Pitch	0.7–1.5*	As suggested by vendors*
Scan duration	Scan time <15 s (single breathhold)	≤10 s (shorter preferred, single breath hold)
Scan mode	Spiral	Spiral
Tube voltage	100 to 140 kVp* for standard sized patient	100 to 120 kVp for standard sized patient 140 kVp for obese participant
	kVP should be set in combination with mAs to meet CTDIvol specifications	Preferably reduce mAs first and then kVp If available: beam-hardening pre-filtering with Sn filter is strongly advised
Tube current	Not specified*	No fixed mAs setting unless at verly low dose
Dose modulation	If available use: automatic tube current modulation, automated kVp selection; if not available: use manual adjusted settings based on patient body habitus and age	If available use: automatic tube current modulation, automated kVp selection, organ dose modulation
Radiation dose (CTDIvol)	≤3 mGy for standard patient	Depending on participant weight: <50 kg: 0.4 mGy; 50–80 kg: 0.8 mGy; >80 kg: 1.6 mGy
FOV	Optimized for each patient: 1-cm beyond rib cage; does not need to include entire chest wall thickness	Does not need to include entire chest wall thickness
Slice thickness	≤2.5 mm slice thickness, ≤1.0 mm preferred	≤1.0 mm, ≤0.75 mm preferred, 1.25 mm may be necessary in obese patients
Slice increment	≤ slice thickness Overlapping reconstructions not mandatory	≤ Slice thickness, maximum 0.7 mm Overlapping reconstructions not mandatory
Reconstruction algorithm	Consistent with diagnostic CT studies; IR algorithms encouraged	IR or deep learning reconstruction; use of FBP reconstruction algorithms is strongly discouraged
Reconstruction kernel	Standard (mediastinum and lung); additional high spatial frequency (lung parenchyma) is optional	Standard body kernel; additional lung kernel is optional

* should be set with other technical parameters to achieve CTDI_vol specifications. ACR-STR, American College of Radiology-Society of Thoracic Radiology; ESTI, European Society of Thoracic Imaging; FBP, filtered-back projection; FOV, field of view; IR, iterative reconstruction; MDCT, multi-detector computed tomography; MIP, maximum intensity projections; MPR, multi-planar reconstruction.

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