An x-ray chest X-ray does not always detect lung nodules. Chest x-rays are not sensitive to nodules smaller than 5 millimeters, and when there are smaller nodules in the body, it is possible that they may not be detected. Chest x-ray tests generally have a higher success rate for lung nodules larger than 5 millimeters and are not sensitive to nodules smaller than 5 millimeters, and if the heart as well as the blood vessels obscure the location of a lung nodule, the chest x-ray will have a difficult time detecting the presence of a lung nodule. In addition, x-ray chest radiographs generally have a low resolution and are not clear, further increasing the difficulty of detecting lung nodules on x-ray chest radiographs. In contrast, chest CT is generally clearer and more sensitive to smaller nodules, and because of the layered nature of the scan, it can show nodules at different levels, which generally results in better detection. Patients with lung nodules should go to the hospital in time and listen to the advice of specialized doctors.