This study focuses on patients with thoracic neoplasms, which are tumors or growths located in the chest area. To monitor these growths, medical imaging is often required. This research aims to compare the effectiveness of using a reduced amount of iodinated contrast medium, a substance injected into the body to make internal structures clearer on scans, against the standard amount used during a spectral CT, a specialized type of computed tomography scan that provides highly detailed images of the body.

The specific substance being tested is iomeprol, which is administered through an intravenous injection, meaning it is delivered directly into a vein. During the trial, participants will undergo imaging using both the standard dose and half the dose of the contrast. The study will evaluate how well the images show blood vessels and organs to ensure that using a smaller amount of the substance still provides clear and useful information for monitoring the disease.