How to measure a lung nodule in a CT Scan DICOM image?

1. How are lung nodules measured?
2. Are nodules measured in mm or CM?
3. What does a nodule look like on a CT scan?

How are lung nodules measured?

Nodule size is most commonly measured manually using electronical calipers, with the long- and perpendicular short-axis being measured on two-dimensional images (5).

Are nodules measured in mm or CM?

Measurements should be expressed to the nearest mm, for example, a nodule with a mean diameter of 7.6 mm should be expressed as a 8 mm nodule (7).

What does a nodule look like on a CT scan?

Commonly called a “spot on the lung” or a “shadow,” a nodule is a round area that is more dense than normal lung tissue. It shows up as a white spot on a CT scan. Lung nodules are usually caused by scar tissue, a healed infection that may never have made you sick, or some irritant in the air.