title: Pulmonary nodule follow-up: be careful with volumetry between contrast enhanced and unenhanced CT.
abstract: Incident pulmonary nodules are a frequent finding on chest computed tomography (CT) of the lungs requiring follow-up. This case illustrates the importance of taking differences in CT scanning techniques (contrast versus non-contrast enhanced) into account. Comparing nodule size on unenhanced follow-up CT's with initial contrast-enhanced CT may consequently underestimate growth and mask malignant growth rates as demonstrated by our case report.
authors.affiliation: Department of Radiology, University Medical Center Utrecht, Utrecht, the Netherlands.
authors.forename: Firdaus A
authors.initials: FA
authors.lastname: Mohamed Hoesein
authors.affiliation: Department of Respiratory Medicine, University Medical Center Utrecht, Utrecht, the Netherlands.
authors.forename: Metin
authors.initials: M
authors.lastname: Bülbül
authors.affiliation: Department of Radiology, University Medical Center Utrecht, Utrecht, the Netherlands.
authors.forename: Pim A
authors.initials: PA
authors.lastname: de Jong
keywords: Computed tomography (CT); follow-up; lung cancer; nodule; volumetry