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CT scan

What is a CT scan?

CT stands for computed tomography.
The CT device comprises a tube that emits X-rays and a detector that rotates around the patient’s body to collect data. The data are then reconstructed and displayed as cross-sectional images by a computer.
Our hospital uses an automatic exposure control (AEC) to reduce exposure.

Equipment at Jyoban Hospital

Siemens SOMATOM Force (192 rows × 2 tubes) (First introduction in Hokkaido/Tohoku region)

Main features

  • A high-definition CT scan with the same exposure dose (about 0.1 to 2 mSv) as a chest X-ray
  • Compared with conventional CT scanners, further lower exposure and reduction in use of a contrast agent
  • A high time resolution (Ability to look like it stops even it moves) that is capable of high speed shooting, 70 cm per second, and it puts little stress on patients
  • It becomes easy to shoot with low tube voltage and the volume of a contrast agent can be reduced.
  • Industry's only CT system equipped with two X-ray tubes

For patients who take a CT scan

If you fall under any of the following, please contact your doctor or laboratory beforehand.
It may not be possible to take the scan.

Those who take a contrast-enhanced CT scan

If you fall under any of the following, please also inform us in advance.
You may not be able to use a contrast agent.

CT scan

A simple CT scan takes about 5 min without a contrast agent and about 10 min with a contrast agent.

  • Do not move your body during the scan.
  • You can talk to the staff at any time during the scan.

Please be assured that the status during the scan is being observed with a monitor.
※The position and breath-holding may be changed depending on the type of scan.

Contrast-enhanced CT scan

A contrast agent is injected into the blood vessels of the arm to scan the entire body (target area).
It is possible to easily observe the organs and blood vessels using an iodine-containing contrast agent.
At the time of taking an appointment or before undergoing the scan, please inform our staff if you fall in any of the following categories:

It has not passed 4 hours since you took a meal
You have had side effects by contrast-enhanced CT scan before
You are taking diabetes drugs
Breast-feeding women
You have kidney dysfunction

Contrast agent allergy

When a contrast agent enters the body, patients experience a warm sensation (the results may vary).
Please be assured that it will subside as time passes.

Q&A

Q

Can a patient with a cardiac pacemaker take a chest CT scan?

For those who have a pacemaker or ICD implanted in their body, please make sure to bring the pacemaker or ICD notebook to show it to the reception both at the pre-examination consultation and on the day of the examination. Irradiating continuous X-rays such as CT may cause problems.

Q

I have a cardiac pacemaker. Is it OK to take an abdominal CT scan?

OK if the battery (body) is not exposed to X-ray.

Q

Is it okay to do a blood test after a contrast-enhanced CT scan?

If you do a blood test on the same day, it is desirable to collect blood before a CT scan. There is a report that a CT scan actually affected a blood test.

Q

If a breastfeeding woman takes a contrast-enhanced CT scan, when can she resume breastfeeding?

Avoid breastfeeding for 48 hours after the administration. In addition, when you resume breastfeeding, please start after pumping and discarding.

Q

After taking a contrast-enhanced CT scan, how many days should I wait to take the next simple CT scan?

You should wait at least 3 days.

Q

I have recently undergone a barium test. How long should I wait to take a CT scan?

You should wait one week to take a CT scan after a barium test.

Q

Is there any impact on those who are taking antidiabetic drug if they take a contrast-enhanced CT scan?

There is a possibility that people taking biguanide-based medicine (METGLUCO, GLYCOLAN, NELBIS, etc.) may have lactic acidosis if they take a contrast-enhanced CT scan.
Those who are taking oral antidiabetic medicine will be checked by our staff before they take a contrast-enhanced CT scan.

CT Images

Introduction of medical equipment