23/05/2026
What a CT Scan (Computed Tomography) Is?
✅ A CT scan (Computed Tomography) is an examination that uses X-rays to create cross-sectional images of the inside of the body, allowing detailed evaluation of organs, blood vessels, bones, and tumors. One of its key advantages is the ability to scan a wide area in a short time. It plays an important role in cancer diagnosis, treatment planning, and evaluation of treatment effectiveness.
During a CT scan, X-rays are projected around the body, and the collected data is analyzed by a computer to generate cross-sectional images. Compared with standard X-ray examinations, CT provides much more detailed information, making it possible to accurately determine the size and location of lesions as well as their relationship with surrounding organs.
✅ CT scans are relatively quick and painless, although they do involve exposure to radiation. Therefore, the necessity of the examination is carefully considered before it is performed.
✅ CT scans are essential for investigating the causes of symptoms, early disease detection, and monitoring treatment progress. If you have any concerns or questions about the examination, please consult the medical staff in advance.
✅ What Can Be Determined with a CT Scan?
CT scans allow detailed visualization of the body’s internal structures through cross-sectional imaging and are used to evaluate a wide range of diseases. In breast disease and cancer care, CT is an important tool for assessing lesions from multiple perspectives.
✅ CT imaging can accurately evaluate the size, location, and shape of lesions. It also helps determine the relationship between lesions and surrounding organs or tissues, making it useful for assessing tumor spread or invasion.
✅ Additionally, CT scans can detect enlarged lymph nodes and determine whether cancer has spread to the lungs, liver, bones, or other areas. This information is important for staging cancer and deciding on treatment strategies.
The information obtained from CT scans is interpreted together with other test results and clinical findings. While CT alone does not provide a definitive diagnosis, it is an indispensable examination for diagnosis and treatment planning.
✅ CT Scan Procedure
1. Pre-Examination Confirmation
After check-in, the examination procedure will be explained, and your physical condition, medical history, and any allergies will be reviewed. Depending on the examination, dietary restrictions may be required beforehand.
2. Preparation
Please wear light clothing if possible. You may be asked to remove outer garments and change into a gown (in some cases, thin clothing may be acceptable). Metal objects such as necklaces or underwire bras must be removed.
3. CT Imaging
You will lie on your back on the examination table while it moves through the CT scanner. During the scan, you will need to remain still and may be asked to hold your breath for a few seconds. The scan itself usually takes only a few minutes to about 10 minutes.
4. After the Examination
Once the imaging is complete, the examination is finished. If contrast material was used, your condition may be observed briefly afterward. In most cases, you can then return to your normal activities.
✅ CT scans are painless and relatively short procedures, and many patients feel that the examination was easier than expected. If you feel anxious or nervous, please speak with the medical staff beforehand.
✅ Important Notes for Contrast-Enhanced CT Scans.
Contrast-enhanced CT scans are not always necessary. When needed, a contrast agent is injected through an IV line to improve image clarity. This allows blood vessels, organs, and tumors to appear more clearly, helping with diagnosis and treatment decisions.
During and Immediately After the Examination
When the contrast agent is injected, you may feel warmth throughout your body or slight discomfort in your throat or body. These sensations are usually temporary and resolve naturally. In rare cases, symptoms such as itching, rash, or nausea may occur. If you notice any unusual symptoms, inform the medical staff immediately.
Allergies and Medical History
Please inform the medical staff in advance if you have previously experienced an allergic reaction to contrast agents, have asthma or allergies, or have kidney disease. To ensure safety, alternative methods or precautions may be considered if necessary.
Hydration Before and After the Examination
Since the contrast agent is mainly excreted through the kidneys, drinking plenty of fluids after the examination is recommended. Unless otherwise instructed, you may resume your normal daily activities afterward.
Pregnancy or Breastfeeding
If you are pregnant, may be pregnant, or are breastfeeding, please consult the medical staff beforehand. The necessity and method of the examination will be carefully considered depending on your situation.
Although contrast-enhanced CT scans are performed with careful attention to safety, please do not hesitate to ask if you have any concerns or questions before the examination.
Precautions After the Examination
In general, you may resume your normal activities after a CT scan unless otherwise instructed. However, if contrast material was used or you feel unwell, there are several points to keep in mind.
Hydration
If contrast material was used, drinking plenty of fluids afterward is recommended to help eliminate the contrast agent from your body. Unless your doctor has advised fluid restriction, try to drink more water than usual.
Monitor for Physical Changes
After the examination, symptoms such as itching, rash, nausea, or general discomfort may occur. Most reactions are mild and temporary, but if symptoms persist or become severe, please contact a medical institution promptly.
Activities on the Day of the Examination
Avoid strenuous exercise and excessive alcohol consumption on the day of the examination. Take care of your physical condition and rest as needed. If contrast material was used, you may be observed at the clinic for a short period afterward.
For Breastfeeding Patients
Recommendations regarding breastfeeding after the use of contrast agents may vary depending on the facility and situation. If you have questions about breastfeeding after the examination, please consult the medical staff.
If you experience any concerning symptoms after the examination, do not hesitate to contact your doctor or medical staff. Completing the examination safely and proceeding to the next stage of care with peace of mind is important.
