High Resolution CT Chest (HRCT).

• To assess any chest X-ray abnormality.
• Suspected mediastinal abnormality (IV contrast injection is recommended).
• Suspected diffuse lung disease e.g interstitial or airway disease (HRCT is recommended).

• CT contraindication:
• Pregnancy.
• contrast material contraindications
• Allergic reaction.
• Renal dysfunction (renal functions tests required before the study).

None

• Leave metal objects including jewelry, eyeglasses, dentures and hairpins prior to your exam, as they may affect the CT images.
• You may be asked not to eat or drink anything for several hours before your scan, especially if a contrast material will be used in your exam.
• History of any medications or allergies should be mentioned, especially if contrast materials is recommended.
• If you are pregnant or suspect that you may be pregnant, you should notify your physician, as radiation exposure during pregnancy may lead to birth defects.

• Computed tomography scan is a non-invasive diagnostic imaging procedure.
• During the scan, you will usually lie on your back on a flat bed that passes into CT scanner.
• The scanner consists of ring that rotates around a small section of your as you pass through it, in this case; your chest.
• The radiographer will operate the scanner from next room. While the scan is taking place, you will be able to hear and speak to them through an intercom.
• You’ll need to lie very still and you may be asked to breathe in, breathe out, or hold your breath at certain points; you will need to comply with these instructions to ensure that the scan images aren’t blurred.

• If contrast material was used during your procedure, you may be monitored for a period of time for any side effects or reactions to the contrast, such as itching, swelling, rash, or difficulty breathing.
• If you notice any pain, redness, and/or swelling at the IV site after you return home following your procedure, you should notify your doctor as this could indicate an infection or other type of reaction.

The amount of radiation used during a CT scan is considered minimal, however hazards of radiation should be mentioned and they include:

• Increased exposure in cases of follow up for chronic diseases or patients with cancer may lead to damage of the bone marrow.
• Increased exposure to radiation may induce cancer.
• Increased risk of fetal malformation in pregnant ladies.
• If contrast material is used, there is a risk for allergic reaction.