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Consultation Info.:049-228-3411

Number Info.:049-228-3400

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CT Examination

September 2,2019 Update

Introduction to the CT examination room

CT stands for Computed Tomography. This is an examination where the body is placed in a large tube in the center of the CT apparatus which uses X-rays and computer processing to examine and image the state inside the body. In addition to the images which are round slices of the body, they can create cross-sections and 3D images from various directions, such as from the front and side of the body.

Our CT examination room has one 128 slice CT scanner (SIEMENS: SOMATOM Definition Flash) and three 16 slice CT scanners (SIEMENS: SOMATOM Emotion16) for a total of 4 scanners which have been operating from April 2010, conducting about 100 CT scans every day.

A 128 slice CT scan can more quickly obtain at one time a very fine, less than 1 mm, high-definition image with dual energy imaging for identification or separation of image that is not obtained in normal CT scans. In addition, because the tube in the center is larger than previously used CT devices (diameter 78cm), the examination is easy to perform and the claustrophobic feeling is reduced.

Also, the examination of the coronary artery that usually nourishes the heart was performed via a heart catheter examination where a catheter (tube) is inserted from an artery in the limbs while hospitalized, but it is now possible to obtain images of coronary arteries without being hospitalized by injecting a contrast agent from a vein similar to the normal contrast CT test while in a CT device equipped with an electrocardiogram. Because the heart is always moving, you need to have a fast time resolution (similar to the shutter speed of the camera). Since the time resolution of our hospital's 128 slice CT can be 75msec, it has become possible to perform a cardiac CT examination corresponding to the movement of any heart, such as for patients with a high heart rate or arrhythmia.

128 slice CT SOMATOM Definition Flash

16 slice CT SOMATOM Emotion16

Examination Room CT Equipment
X-12A SIEMENS SOMATOM Emotion16 (16 slice CT)
X-12B
X-13
X-14 SIEMENS SOMATOM Definition Flash (128 slice CT)

Time for the examination

The inspection time is usually 5 - 10 minutes for a simple CT scan, and it takes about 10 - 20 minutes for a contrast CT examination. This may differ for the same inspection site depending on the contents of the inspection. In fact, the time the X-rays will be applied will depend on the inspection site and the details, but it has been reduced due to the progress in the CT devices.

Important Points

  • Please refrain from wearing underwear with metal or clothing with fasteners, etc. If the metal part overlaps with the inspection site you may need to shift the clothing or changed to an examination garment.
  • Wigs and dentures may need to be removed depending on the inspection site (head and neck).
  • A CT examination is a test that is sensitive to movement. We may ask for your cooperation such as having you hold your breath or not move your body during the examination. A small child may need to sleep before the inspection if they tend to move during the examination.
  • Please talk to the attending doctor or the CT room staff if you might be pregnant.
  • To patients who are using contrast agents

Before the examination

    • Please refrain from eating for three hours before the examination.
    • Please drink water and tea as usual so that you do not get thirsty.
    • Please bring the "Explanation and Consent Confirmation Form for Use of an Iodine Contrast Agent" on the day of examination.
    • You may not be able to have an examination with the contrast agent depending on the content of the disease that is currently or was previously being treated, so please consult with your attending doctor. (Asthma, hyperthyroidism, multiple myeloma, primary macroglobulin, pheochromocytoma, renal dysfunction, etc.)
    • Please be sure to talk to your attending doctor if you have had any side effects before when using a contrast agent.
    • Please continue to take the medicines you are taking as usual unless otherwise instructed. You may be asked to refrain from taking some medications for diabetes.

During the Examination

    • When the contrast agent is injected, your body may feel hot, but do not worry because this will disappear when the injection ends. There is a rare possibility that side effects may occur, so please do not hesitate to let us know if you feel sick.

After the Examination

    • The contrast agent is excreted from the body in the urine. In order to encourage the excretion of the contrast agent, patients who do not have limits on fluid intake should please drink a little more water and tea than usual.
    • Because there are no activity restrictions, even when using a contrast agent, please continue your normal life.
    • In rare cases, symptoms such as headaches, itching, nausea, eczema, dizziness, etc. may appear a few hours or a few days after the use of a contrast agent. Any persons who see any of these symptoms should consult with the CT Examination room or the Department of Emergency Medicine (ER) (on nights and holidays).

Contact information

049‐228‐3518[Department of Radiology, CT Examination Room Direct]

  • Please feel free to contact us if you have any questions about the examination.
  • Please contact the department in charge if you are unable to visit the hospital on that day or if you have any questions about changing your reservation.
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