Is an X-ray or CT scan used for imaging when there is a cough?

In general, a CT scan is usually required when taking images for cough, while X-ray examination is less commonly used; however, the specific choice should be based on the patient's actual condition.

X-ray examination primarily uses X-rays generated by specialized equipment to scan the affected area, producing a two-dimensional image. However, it cannot clearly show lesions between tissues or soft tissues. If the patient has no other abnormal symptoms besides cough, an X-ray examination may be performed to identify the location of the lesion and observe its characteristics, providing valuable information for diagnosis.

CT scanning works on a similar principle to X-ray imaging but provides clearer images with higher resolution, enabling accurate detection of solid lesions in soft tissues. Therefore, if a patient has a prolonged cough accompanied by symptoms such as chest pain, a CT scan is recommended.

Patients are advised to consult their doctor beforehand regarding whether fasting is required prior to the examination. During the procedure, they should avoid wearing metal accessories, follow the doctor’s instructions carefully, and remain still to prevent interference with the imaging results.