電腦掃描是一種X光造影技術，可以計算人體組織對X光吸收程度，

之後把身體每個器官及部份構成三維圖像。

CT combines X-Ray with advanced computer analysis.

It provides three dimensional images of organs.

過程:

1. 病人將會躺在掃描床上，過程中掃描床會慢慢移向掃描機器

2. 在檢查期間，病人不可移動，否則影像會模糊不清

3. 病人可能需要聽從指示控制呼吸

Procedure:

1. You will be lying down on the scanning bed. The bed will then move into the machine slowly.

2. Try to keep still during the exam to ensure the best quality.

3. You may be asked to follow the breath-holding instruction.

檢查前注意事項 (需要注射顯影劑) :

1. 腎病患者需持有3個月腎功能驗血結果。
2. 糖尿病患者需於掃描當天停服降血糖藥(Glucophage, Metformin) ，並於完成掃描48小時後才開始正常服用。
3. 冠狀動脈掃描檢查前12小時禁止做運動飲咖啡, 茶或可樂。
4. 如曾經嚴重過敏反應, 請通知你的醫生。
5. 請確定在檢查時並沒有懷孕。

Preparation before CT with contrast:

1. Renal function: Creatinine within 3 months is required.
2. Diabetes: Stop oral diabetic medications (Glucophage, Metformin) on the day of scan.  Metformin can be restarted 48 hours after contrast.
3. Coronary Angiogram: No exercise, coffee, tea or coke 12 hrs before the exam.
4. Contrast Allergy History: Please inform your doctor.
5. Please exclude pregnancy.