Table 5.

Comparison of lung densities between the whole lung and the precancerous sphere

Patient ID	Pathology of lung cancer	Interstitial lung abnormalities	LAA% of whole lung	Median whole lung density (HU)	Sphere density (HU)	Difference between the two densities (HU)
1	Unknown	None	40.0	−932.5	−944.0	11.5
2	Adeno	None	5.9	−898.0	−885.2	−12.8
3	Adeno	None	22.1	−902.0	−880.8	−21.2
4	Adeno	None	5.3	−858.8	−832.7	−26.1
5	Adeno	None	14.9	−896.2	−764.4	−131.8
6	Unknown	Present	26.7	−902.1	−769.1	−133.0
7	Small cell	Present	34.0	−930.9	−674.2	−256.7
8	Small cell	Present	10.7	−823.2	−664.5	−158.8
9	Squamous	Present	16.1	−868.1	−702.4	−165.7
10	Unknown	Present	11.4	−843.9	−698.5	−145.4
11	Squamous	Present	13.8	−904.4	−803.8	−100.5
12	Unknown	Present	27.6	−907.3	−905.1	−2.2
13	Adeno	Present	19.7	−899.9	−910.9	11.0
14	Squamous	Present	17.7	−906.9	−901.4	−5.5

Abbreviations: LAA, low attenuation area; HU, Hounsfield unit; Adeno, adenocarcinoma; Small cell, small cell carcinoma; Squamous; squamous carcinoma.