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Radiology - CT Scan

Computed Tomography (CT) has witnessed a change over the past 20 years. It is said that the use of CT for applications in radiological diagnosis during the 70s sparked a revolution in the field of medical engineering. Innovative scanners, advanced applications were introduced in the CT technology that brought about exciting breakthroughs in clinical procedures that helped in addressing various public health issues. In the Indian scenario, CT technology has today become an indispensable and integral component of routine work in clinical and medical practice, specifically in radio-diagnosis and procedures such as colonography, cancer detection and staging, lung analysis, cardiac studies and radiotherapy planning.

Faster Acquisition at Optimised Dose
It is important for clinicians to get fast and high-quality acquisitions at optimised dose for patients young and old, large built and small built & across a wide spectrum of procedures like: cardiac, peripheral angiography, brain, chest, abdomen, orthopedic, oncology and more. The Optima CT660 provides clinicians with information for efficient and definitive diagnoses at low-dose while patients stay calm and comfortable. This feature helps clinicians to build patient's confidence and is quiet useful while examining aged people and children.

High Image Quality
For radiologists, it's important that the CT Scanner delivers high IQ particularly Z-axis visualisation. The Optima CT660 enables acquisition of 128 slices per rotation in axial scanning modes and delivers improved Z-axis visualisation relative to non-overlapped reconstruction. The system also provides for better image clarity and optimised imaging power for most critical studies. "With the help of this CT Scanner, we are able to examine the coronaries very efficiently. Moreover, earlier we used Doppler for diagnosis of gangrenes and thrombosis assessment. But now, with this CT scanner all of these functions can be performed efficiently.

A revolution for CT systems
CT Scanners like Optima CT660 are set to revolutionise CT technology. Such systems are definitely sought by radiologists that need to manage heavy patient workflow; especially old aged patients and children. This low dose CT machine also helps address the challenge of radiation dose management which is crucial not only for patients but, also clinicians.

The Optima CT660 is also environmentally friendly with a design for refurbishment and end-of-life recycling, and with electronics innovations that cut power consumption by 60 percent using the energy saving mode.

Nothing matters more than patient's welfare. The Optima CT660 provides clinicians information for fast and definitive diagnoses in low-dose exams. Optima CT660's fast clinical applications have helped us increase our throughput by 50 per cent and has facilitated our clinicians to make fast and confident diagnosis."

GE Optima CT660
GE Light Speed


Q. What are the dangers of CT scanning?

Though it involves X-Ray radiations, there are no dangers in practice. Only for pregnant women, it should be done after weighing all the risks of exposing their fetus to radiations and benefits (like any other CT investigation). Dangers of contrast medium

Q. What is a 'contrast' medium?

A contrast is an iodinated compound injected intravenously (peripherally) to opacify the vessels and enhance the ability of CT scans to pick up abnormalities Only the very safest contrast (non-ionic) is used for all the patients in our centre. This gives better compliance with patients, as compared to ionic contrast, which is cheaper but, gives more adverse reactions.


  • Dangers of contrast medium
  • Though not so common, the contrast medium involved in a CT scan poses a slight risk of allergic reaction.
  • Most reactions result in hives or itchiness.
  • For individuals with asthma who become allergic to the contrast medium, the reaction can be an asthma attack
  • In very rare instances, an allergic reaction might cause swelling in your throat or other areas of your body
  • If you experience hives, itchiness or swelling in your throat during or after your CT exam, immediately tell your technologist or doctor. We keep an emergency kit for all commonly known adverse reactions.

Q. Who is at 'high-risk' for contrast injection?

  • Past history of reaction to contrast/any other drugs.
  • Bronchial asthma.
  • Cardiac/kidney disease /diabetes etc.

Q. Other indications your doctor may recommend a CT scan to help?

  • Diagnose muscle and bone disorders, such as bone tumors and fractures.
  • Pinpoint the location of a tumor, infection or blood clot.
  • Guide procedures such as surgery, biopsy and radiation.
  • Detect and monitor diseases such as cancer.
  • Detect internal injuries and internal bleeding.

Q. What can you expect during a CT scan?

During the CT scan, you lie on a narrow table that slides through the opening of a large device called the gantry. The table can be raised, lowered or tilted. Straps and pillows may help you stay in position. During a CT scan of the head, the table may be fitted with a special cradle that holds your head still.

As the X-Ray tube rotates around your body, the table slowly moves through the gantry. While the table is moving, you may need to hold your breath to avoid blurring the images. You may hear clicking and whirring noises. Each rotation yields several images of thin slices of your body.

During this time, a technologist in a shielded room supervises the CT scan and monitors the images as they appear on the computer screen. The technologist can see and hear you, and you can communicate via intercom.

If an infant or small child is having the CT scan, you may be allowed to stay with your child during the test. If so, you may be asked to wear a lead apron to shield you from X-ray exposure.

CT scans are painless. If your exam involves use of an intravenous contrast medium, you may feel a brief sensation of heat or experience a metallic taste in your mouth. If you receive contrast medium through an enema-to help highlight your lower gastrointestinal region-you may feel a sense of fullness or cramping.

After the exam, you can return to your normal routine. If you were given a contrast medium, your doctor or the radiography staff may give you special instructions. These likely include drinking lots of fluids to help remove the medium from your body.