CT Scan
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CT or CAT scans,

are special X-ray tests that produce cross-sectional images of the body using X-rays and a computer. CT scans are also referred to as computerized axial tomography.

CT was developed independently by a British engineer named Sir Godfrey Hounsfield and Dr. Alan Cormack. It has become a mainstay for diagnosing medical diseases. For their work, Hounsfield and Cormack were jointly awarded the Nobel Prize in 1979.

CT scanners have vastly improved patient comfort because a scan can be done quickly. Improvements have led to higher-resolution images, which assist the doctor in making a diagnosis. For example, the CT scan can help doctors to visualize small nodules or tumours, which they cannot see with a plain film X-ray. If one looks at a standard X-ray image or radiograph (such as a chest X-ray), it appears as if they are looking through the body. CT and MRI are similar to each other, but provide a much different view of the body than an X-ray does. CT and MRI produce cross-sectional images that appear to open the body up, allowing the doctor to look at it from the inside. MRI uses a magnetic field and radio waves to produce images, while CT uses X-rays to produce images. Plain X-rays are an inexpensive, quick test and are accurate at diagnosing things such as pneumoniaarthritis, and fractures. CT and MRI better to evaluate soft tissues such as the brain, liver, and abdominal organs, as well as to visualize subtle abnormalities that may not be apparent on regular X-ray tests

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  • CT scan images allow the doctor to look at the inside of the body just as one would look at the inside of a loaf of bread by slicing it. This type of special X-ray, in a sense, takes “pictures” of slices of the body so doctors can look right at the area of interest. CT scans are frequently used to evaluate the brain, neck, spine, chest, abdomen, pelvis, and sinuses.
  • CT is a commonly performed procedure. Scanners are found not only in hospital X-ray departments, but also in outpatient offices.
  • CT has revolutionized medicine because it allows doctors to see diseases that, in the past, could often only be found at surgery or at autopsy. CT is noninvasive, safe, and well-tolerated. It provides a highly detailed look at many different parts of the body.
  • People often have CT scans to further evaluate an abnormality seen on another test such as an X-ray or an ultrasound. They may also have a CT to check for specific symptoms such as pain or dizziness. People with cancer may have a CT to evaluate the spread of disease.
  • A Head or Brain CT is used to evaluate the various structures of the brain to look for a mass, stroke, area of bleeding, or blood vessel abnormality. It is also sometimes used to look at the skull.Source
What is a CT scan?
CT is an abbreviation for computed tomography or computed axial tomography (CAT) scan. This type of scan uses x-rays and a computer to create detailed cross-sectional images of the body. These images provide more detailed information than a normal x-ray. CT scans usually produce two-dimensional images of a “slice” or section of the body, although the data can also be reconstructed to build three-dimensional images.
 
What can be detected by a CT scan / When is CT used?
Although a CT scan has many applications, it is mainly used for a rapid examination of patients who may have internal injuries and/or bleeding from accidents or other types of trauma. A CT scan can visualize nearly all parts of the body and is used to diagnose diseases or injuries as well as to plan medical, surgical or radiation treatment. It can diagnose muscle and bone disorders, bone fractures and tumours. It can detect and monitor conditions such as cancer, heart disease, lung nodules and liver masses. A CT scan is also used to pinpoint the exact location of a tumour, infection or blood clot. In addition, it can help to guide procedures such as biopsies, surgeries or radiation therapy.
 
The results of a CT scan can be used to help a doctor diagnose a condition and to assess the effectiveness of previous treatment as well as to plan future treatment.
 
What happens during a CT scan?
A CT scanner is a large, doughnut-shaped machine. It has a sliding table in the centre so that a patient may be placed effortlessly into the machine. He or she remains horizontal, at rest during the entire scan procedure. The table slowly moves through the scanner while the x-rays rotate around the body and the machine emits thin beams of x-rays. x-ray detectors pick up the strength of this beam. The more dense the tissue, the fewer x-rays pass through. This information is fed into a computer where different densities show up different types of tissue and create a picture.
 
It is important to keep as still as possible during the CT scan, to achieve the highest possible quality of the images. You might also be asked to hold your breath at times. A CT scan of a single body part typically takes around 30 minutes.
 
CT versus MRI
A CT scan uses X-Rays, whilst an MRI scan uses magnets and radio waves.
An MRI scan shows tendons and ligaments, whilst a CT scan does not.
An MRI scan is preferable for examining the spinal cord.
A CT scan is better suited for cancer, pneumonia, abnormal chest x-rays and bleeding on the brain, especially after an injury.
However, a brain tumour is more clearly visible on a MRI scan.
A CT scan shows organ tears and organ injury more rapidly and thus is more suitable for trauma cases.
Broken bones and vertebrae are more clearly visible on a CT scan.
CT scans provide a better image of the lungs and organs in the chest cavity between the lungs.
 
How does a CT scan work?
Unlike traditional x-rays, which use a stationary tube, a CT scanner uses a mechanical x-ray source that rotates around the circular opening of a donut-shaped structure called a giant gantry. During a CT scan, the patient lies on a slowly moving bed on the cylinder bridge as the x-ray tube rotates around the patient, projecting narrow beams of x-rays through the body. Instead of film, CT scanners use special digital x-ray detectors, which are located directly in front of the x-ray source. As the x-rays pass through a body part, they are collected by detectors and transmitted to a computer.
 
Each time the x-ray source completes a full cycle, the CT scan computer uses sophisticated mathematical techniques to create a two-dimensional image slice. The tissue thickness shown on each image slide may vary depending on the CT scan machine used, but is generally between 1 and 10 milimetres. When each “slice” is complete, the image is stored and the mechanical bench progressively advances along the gantry. The x-ray scanning process is repeated to produce another image slice. This process continues until slides are collected, covering the required area.
 
What is a contrast agent and when is it used?
With a CT scan, soft tissues do not show up as clearly as dense substances like bones. Therefore, a dye – a contrast agent – may sometimes be administered to help internal structures appear more clearly on the x-ray images. The contrast agent “blocks” the x-rays and appears white on the scan, highlighting blood vessels, organs or other structures. Contrast materials are usually made of iodine or barium sulphate. They may be administered in one of three ways: orally, by injection or by enema.
 
Safety of a CT scan
A CT scan is a quick and painless procedure and invariably safe. There is however a small risk from exposure to x-ray radiation or of an allergic reaction to the contrast dye. The amount of radiation during a CT scan varies depending on how much of the body is being scanned. CT scanners are designed to ensure that levels of radiation are kept to the minimum necessary for the related procedure.
 
What are the risks from a CT Scan?
Exposure to ionizing radiation, more than during a plain x-ray, occurs during a CT scan. However, the low doses of radiation used in CT scans have not been shown to cause long-term harm. At much higher doses, the potential risk of cancer increases slightly. However, this small potential risk is outweighed by a CT scan’s many benefits. To obtain the required medical information, the lowest possible doses of radiation are always used. Although some patients are allergic to the contrast materials, most of the time, any reaction is mild and only leads to minor itchiness or a rash.
 

The amount of radiation used in a CT scan is minimal and so the risk of exposure is low. Radiation exposure during pregnancy can lead to birth defects and s

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o patients knowing or suspecting they are pregnant should tell the doctor. Using a contrast agent may cause an allergic reaction. Patients planning a CT scan who are allergic or sensitive to medication, contrast agents, iodine or shellfish should inform their doctor. In some cases, the contrast agent can harm the kidneys, especially if the person is taking glucophage, a medicine for diabetes. Patients with a history of kidney problems should tell their doctor. Certain factors or conditions can affect the accuracy of a chest CT scan. These factors include metal objects in the chest, such as surgical clips or a pacemaker, body piercings on the chest and/or barium in the esophagus from a recent examination.

CT Scan Prices

CT ScanPrice fromExtras
CT Scan: 128 Slice£369Contrast from £150-£200
CT Scan: 640 Slice £399Contrast from £150-£200
CT Heart (Calcium Score)£495-£900Contrast from £150-£200
CT Brain Scan£369-£900Contrast from £150-£200
CT Virtual Colonoscopy£1,050Contrast from £150-£200
CT Coronary Angiogram (CTCA) £1,449Contrast from £150-£200

Frequently Asked Questions

What is a CT Scan?

  • CT scan (Computerised Tomography Scan) is sometimes referred to as a CAT scan (Computerised Axial Tomography).
  • CT scan is a non-invasive method of diagnosing abnormalities in the structure of the body.
  • CT scan uses a combination of multiple X-ray images taken in series from different angles. These images are processed by a computer to create cross-sectional views of soft tissues, bones and blood vessels. Three Dimensional (3D) views of internal organs and body structure can be created using CT scans.
  • CTA (Computerised Tomographic Angiography) is an technique used to visualise blood flow in arteries.
  • CT images provide information in far greater detail than plain X-rays.

When is a CT Scan used?

  • To examine internal organs following injuries, accidents or trauma.
  • To study bone disorders and fractures.
  • To diagnose muscle disorders, tumours, infections and blood clots.
  • For guiding medical treatments during surgery, biopsy and radiation therapy.
  • For the detection and monitoring of liver masses, lung nodules, heart diseases and cancer.

How is CT Scan different from MRI Scan?

  • CT scans can sometimes provide more detail about the head, eyes, inner ear and sinuses, hearts, lungs, skeletal system, pelvis, hips, reproductive systems, bladder and gastrointestinal tract; while MRI scans can shows clearer differences between normal and abnormal tissues.
  • CT scan involves a little radiation, while MRI scans are radiation free.
  • CT scans are quick, comfortable and more suitable for claustrophobic patients, while MRI scans are noisier, a little more enclosed and take a longer time.
  • CT scanners allow you to move a little during the scan, while MRI scans require the patient to remain very still.

What are the different types of CT Scanners available?

  • CT scan machines vary from 32 slice to 640 slice CT. More slices can means less radiation exposure and better quality images

What types of CT Scans can be performed?

Abdomen, Adrenal Glands, Appendix, Arm, Back, Bile Ducts, Bladder, Blood Vessels, Bone, Bowel, Brain, Breast, Calcium Score, Cervical Spine, Cervix, Chest, Clavicle Joints, Coronary Angiogram, Coccyx, Cranial, CTA, Elbow, Facial Bones, Fallopian Tube, Fetus, Full Body, Gallbladder, Hand, Head, Heart, Hip, Internal Auditory Canal, Joint, Kidney, Knee, Leg, Liver, Lumbar Spine, Lymph Nodes, Mandibles, Neck Soft Tissue, Orbits, Ovaries, Pancreas, Pelvis, Penis, Prostate, Scrotum, Shoulder, Sinus, Skull, Spine, Spleen, Stone Search, Temporal Bones, Testicles, Thoracic Cavity, Thoracic Spine, Tumor, Urinary Tract, Uterus, Wrist

What is IV Contrast and Oral Contrast?

  • Sometimes a contrast injection (iodine based material) is used to enhance the images of the blood vessels and the soft tissue. This is normally used in cases of CT for Head, Neck Soft Tissues, Extremities, Spine, Chest, Renal System and Blood Vessel Scans.
  • In some cases your doctor may prescribe for an oral contrast such as Barium which is used to enhance images of the digestive tract. This is commonly used in CT scans of the Abdomen, Pelvis and other Abdominal Organs.

How long does it take to do a CT Scan?

Generally the scan take a few minutes to perform. The total time required for your appointment varies from 15 to 45 minutes including the preparation. Sometimes an additional test or scan is required before the actual CT Scan.

How soon are the images available?

The CT Scan images are available directly from the Imaging Centre on a CD ROM on the day of scanning or can be posted to you.

How soon is the Report available?

The images are studied by a medical practitioner (Consultant Radiologist) and the final report is produced and shared within 5-7 days.

What are the risks and restrictions in a CT Scan?

  • Although CT scans involve radiation, this is kept to the lowest dose compatible with obtaining high quality images with the help of advanced machines.
  • The scans are not painful, but if contrast material is used it can sometimes make you feel warm.
  • Patients are not given contrast if they have poor kidney function or renal impairment.
  • Patients who may be pregnant, need to check with their doctors before undergoing a CT Scan.
  • CT Scan machines can normally accommodate patients weighting up to 400 lbs.
  • Usually the CT scan does not make you feel claustrophobic, however patients should inform staff if they are claustrophobic and sedatives can be provided if necessary.

We are currently booking for dates between:  21.10.2021 – 26.10.2021

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Secure Scanners Limited | MRI Scan, CT Scan, Full Body Scan