Preparation Instructions Before the Examination
CT Colonography
This examination can detect polyps in the colon that have abnormal growths, sized 6 mm or larger, easily and without complexity. There is no need to insert a long tube into the colon. It can examine parts of the colon that cannot be reached by endoscopy.
The examination is quick, taking about 15 – 20 minutes, and can also visualize other organs in the abdominal cavity during the same scan.
Preparation for the examination: Since the details of the colon wall need to be observed, it is necessary to clean the colon before the examination by eating a low-fiber diet for 2 days and taking laxatives 1 day before the examination.
Examination Procedure
- Air is introduced into the colon through the anus.
- Lie still on the examination bed in the position arranged by the staff. Buscopan may be injected to help expand the colon.
- Follow the staff’s instructions, such as breathing in and out and holding your breath, to ensure clear images from the scan.
- Data is collected using a CT scanner.
- The data is processed to create 2D and 3D images of the colon.
Preparation Instructions Before CT Scan
Cardiac and Coronary CT Scan
Before the Examination
- Do not eat or drink for at least 4 – 6 hours.
- Take medications as usual, except diabetic patients should skip diabetes medication on the day of the exam.
- The staff will ask about allergies to contrast agents, seafood, medications, history of allergies, severe asthma, heart disease, and kidney disease.
- An EKG with results must be done at least 3 days before the examination.
- Nurses will administer fluids through a vein in the arm crease for contrast injection.
- If the patient’s heart rate is over 70 beats per minute, medication to reduce heart rate may be given 30 minutes before the exam.
- During the examination, patients must follow staff instructions such as breathing in and out and holding their breath for at least 15 seconds to ensure clear images.
Note: If you suspect pregnancy or have a history of allergy to contrast agents, seafood, medications, allergies, severe asthma, please inform the staff before the examination. If you have taken blood pressure medication on the day of the exam, please inform the staff before the examination.
Preparation Before Upper Abdominal CT Scan with Contrast Injection
- Do not eat or drink for at least 4 – 6 hours.
- Take medications as usual, except diabetic patients should skip diabetes medication on the day of the exam.
- The staff will ask about allergies to contrast agents, seafood, allergies, severe asthma, heart disease, and kidney disease before the exam.
- Generally, the doctor will instruct to drink about 500 cc of water mixed with contrast agent 10-30 minutes before the exam.
- Nurses will administer fluids through a vein in the arm crease for contrast injection.
- During the examination, the bed will move in and out several times. Please lie still and follow the staff’s instructions such as breathing in and out and holding your breath to ensure clear images.
Preparation Before Whole Abdominal CT Scan with Contrast Injection
- Do not eat or drink for at least 4-6 hours.
- Take medications as usual, except diabetic patients should skip diabetes medication on the day of the exam.
- The staff will ask about allergies to contrast agents, seafood, allergies, severe asthma, heart disease, and kidney disease before the exam.
- Generally, the doctor will instruct to drink about 1,000 cc of water mixed with contrast agent 1-2 hours before the exam and may require an enema with contrast agent through the rectum.
- Nurses will administer fluids through a vein in the arm crease for contrast injection during the examination.
