The document discusses detecting lung cancer at an early stage through analysis of volatile organic compounds (VOCs) in exhaled air using an electronic nose. It describes the two main types of lung cancer and detection methods like CT scans. The electronic nose system collects breath samples from patients and analyzes VOCs using sensor arrays. Certain VOCs like 1-butanol and 3-hydroxy-2-butanone indicate lung cancer. Analysis of peak height, rate to peak height, rate of recovery, and area under the curve found lower values for cancer patients. The electronic nose mimics the mammalian olfactory system and uses sensors like MOSFETs and optical fibers to detect chemical changes from VOCs. This non-invasive, inexpensive