LDCT
Pronunciation: EL-dee-see-tee
Also written as: LDCT — low-dose computed tomography
Low-radiation CT scanning technique used for lung cancer screening in high-risk individuals.
Full Definition
LDCT (low-dose computed tomography) is a specialized imaging technique that uses reduced radiation exposure compared to standard CT scans while maintaining adequate image quality for detecting lung nodules and early-stage lung cancer. LDCT screening has been shown to reduce lung cancer mortality in high-risk populations, particularly current and former heavy smokers. The technique involves taking cross-sectional images of the chest without contrast material, allowing radiologists to identify small pulmonary nodules that may represent early lung cancer. However, LDCT screening also has a high rate of false positive findings due to the detection of benign nodules.
Usage
Usage note: Specifically refers to low-dose protocol CT, not standard CT. The 'low-dose' qualifier is essential for accuracy.
In Context
- "Annual LDCT screening is recommended for individuals with a 30 pack-year smoking history." — Clinical screening guideline
- "The LDCT revealed a 6mm solid nodule in the right upper lobe requiring follow-up imaging." — Radiology report