Computerize Tomography Scan (CT)

What is a CT?

Computerized Tomography, CT in short, is a sophisticated technology that can produce a series of cross-sectional images of human body. A CT scan uses a circle of X-rays and computer analysis to produce multiple images of inner body. It is suitable for analyzing the inner body structures including organs, bones, soft tissues, and blood vessels. The images will be clearer than those produced by regular X-ray examination. It can diagnose infectious disease, cardiovascular disease, musculoskeletal disorders, trauma, and cancers. Experienced radiologists will interpret the produced images and write the diagnostic reports.

At Trinity Medical Imaging Center, our new CT scanner is an Ultra-Low Radiation Dose CT that introduces the latest CT technology to reduce patient radiation dose to only 1/6 of that of a standard CT, along with O-MAR technology that can reduce metallic artifacts.

Why 256-Slice Computed Tomography – Philips iCT Elite ?

Trinity is one of 4 medical service providers in Hong Kong having this machine. Philips iCT Elite provides superb low radiation dose and high resolution examination with premium results. Its ultra fast rotation time (0.27 second per rotation) can shorten the examination time especially for cardiac scan patients. Equipped with the latest O-MAR technology, metal artifacts related to orthopedic implants can also be reduced significantly.

Advantages of 256-Slice Computed Tomography – Philips iCT Elite

  • Iterative Model Reconstruction Technology (IMR) – both radiation dose and image noise reduction in all types of exam
  • Wide NanoPanel Elite CT detector – for shorter scan time and improved image quality
  • Metal Artifact Reduction for Orthopaedic Implants Technology (O-MAR)
  • Ultra fast rotation time 0.27 second/rotation
  • Superb low-contrast resolution 2mm @ 0.3%

How is a CT done?

A radiographer will require will be scanned closing to the CT gantry with lying position.

If your scan involves abdomen or pelvis, you are necessary to drink oral contrast solution for the sake of making the stomach and intestines more clearly.

 

In some cases, intravenous (IV) injection of contrast agent is required which is usually injected into the hand vein. You may feel hot and have metallic taste in your mouth after accepting IV injection. These sensations are normal and will disappear within one minute.

When the exam table moves slowly into the scanner, you need to remain motionless position during the whole scan procedure. Sometimes, our radiographer will instruct you to hold your breath for the need of certain studies. Usually, the scan procedure lasts 10-45 minutes. The specific time varies from different body parts.

What to notice afterwards

In many cases, you are able to go home by your own after completing the scan. But if you have taken IV injection and found any redness, swelling, hot, or pain in your skin, please tell our physician immediately.

Your radiographer will send a wet film and written report after finishing the scan procedure.

What to let us know?

Under below conditions, please tell our technician in advance of the scan:

  • Being pregnant or suspect yourself being pregnant
  • Being breast-feeding
  • Have experienced an adverse reaction to contrast injection or other drugs previously
  • Have a history of asthma, kidney disease, heart disease, thyroid disease, allergy, or diabetes mellitus.

How to prepare?

  • Please bring your previous X-ray, CT, MRI or Ultrasound films and reports for reference.
  • No food or drinks for 4 hours before contrast CT. Regular medications can still be taken with small amount of plain water.
  • Inform our staff if you have any allergies (especially towards contrast medium), asthma, or eczema.
  • Inform our staff if you are diabetic or taking the diabetic drug “Metformin”.

Coronary Angiogram (CTCA)

  • No exercise, alcohol, smoking, coffee, tea or coke 12 hours before examination.
  • Inform our staff if you are diabetic or taking the diabetic drug “Metformin”.
  • If you are on METFORMIN (GLUCOPHAGE), please stop this drug on the day of examination and withhold it for 48 hours after the examination.
  • No food or drinks for 4 hours before contrast CT. Regular medications can still be taken with small amounts of plain water.
  • Please bring your previous X-ray, CT, MRI or Ultrasound films and reports for reference.
  • Inform our staff if you have any allergies (especially towards contrast medium), asthma, or eczema.
  • Inform our staff if you are or may be pregnant.