Table 1.

Guidelines for SSN Reporting

Parameter	Current Recommendations
Slice thickness	•Contiguous thin section slices4: Fleischner Society ≤ 1.5 mm,10 BTS ≤ 1.25 mm,6 and NCCN ≤ 1 mm preferred,9 particularly for nodules < 10 mm7 , 10
Reconstruction algorithm	•High-frequency, sharp reconstruction algorithms10
Display window	•Lung windows; attenuation of nonsolid components may not meet attenuation threshold to be displayed on soft tissue mediastinal windows10 •Mediastinal display windows may aid qualitative assessment for presence or change in nodule density/solid components11 , 12
Multiplanar reformatted images	•Measurement should be made in plane of largest dimension10
Reporting of nodule size	•Include all components, including cystic and ground-glass, in overall nodule size10 •Long- and short-axis measurements should be perpendicular and in same plane10 ○Lung-RADS,a NCCN: report nodule mean diameter8 , 9 ○Fleischner Society: mean diameter for SSNs < 10 mm; bidirectional measures for SSNs > 10 mm10 •Long-axis dimension of the largest solid component should be reported, rather than summing/estimating percent solid components10 , 13 •Report to nearest millimeter10

BTS = British Thoracic Society; NCCN = National Comprehensive Cancer Network; SSN = subsolid nodule.

^aPractice guidelines addressing SSN management include those for screening-detected nodules from the American College of Radiology.