Table 3 Comparison of the HU values between the CT image and 3D-printed phantom21,22.

From: Development of a patient-specific chest computed tomography imaging phantom with realistic lung lesions using silicone casting and three-dimensional printing

 

Standard value

Phantom value

Normal lung parenchyma

 − 600 to − 800

 − 777.32 ± 24.84

Lung disease

Fibrosis

 − 500 to − 700

 − 682.61 ± 22.92

Solid nodule

 ~  − 200

 − 120.05 ± 41.86

Emphysema

 − 850 ~ 

 − 908.55 ± 18.32

Chest structure

Muscle

10 to 150

111.33 ± 23.22

Fat

 − 50 to − 100

 − 159.60 ± 20.98

Skin

 − 200 to + 100

164.75 ± 28.92

Bone

 > 1000

199.80 ± 24.14

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