Low-Dose Lung CT

Low-dose spiral CT of the lungs for early detection of pulmonary nodules and bronchial carcinoma at radiation levels comparable to a chest X-ray. Performed on the Siemens SOMATOM Force.

Low-dose multi-slice spiral CT of the lungs at Private Access Linz uses the Siemens SOMATOM Force's advanced dose-modulation and iterative reconstruction to perform a diagnostic-quality lung survey at effective radiation doses comparable to or lower than conventional chest radiography. This represents a fundamental improvement over older low-dose CT protocols, where image quality was compromised by aggressive dose reduction. The examination is currently considered the best available method for early detection of bronchial carcinomas. Randomised controlled trials — most notably the US National Lung Screening Trial and the European NELSON trial — have demonstrated that annual low-dose CT in high-risk individuals (current or former heavy smokers aged 50–74) reduces lung cancer mortality by 20–26% by identifying malignant nodules at a stage when curative surgical resection is possible. At Private Access Linz, the acquisition covers the entire thorax from apices to diaphragm in a single breath-hold. The resulting images are reviewed with dedicated lung window settings and optionally with mediastinal windows to characterise any detected nodules. Nodule size, morphology, density (solid vs. part-solid vs. ground-glass), and growth characteristics are documented using Lung-RADS or equivalent structured reporting to guide follow-up intervals. The SOMATOM Force's dual-energy capability adds the option to characterise indeterminate nodules by their iodine uptake or effective atomic number, which can provide additional benign-versus-malignant discrimination without a separate PET-CT referral in some cases. The examination requires no fasting, no contrast, no intravenous access, and takes approximately five minutes of scan time with a total appointment duration around 20 minutes.