Computed Tomography (CT)

Computed Tomography (CT) / Multislice CT

Computed Tomography (CT) is an imaging method that uses X-rays and computer technology together to obtain detailed images of the body. With Computed Tomography, cross-sectional images of the bones, muscles, and organs can be obtained.

Multislice CT, also known as Computed Tomography (CT), used in the Radiology Department of Daviva Health Group provides a detailed and fast scan in the field of diagnostic imaging.

What Is Computed Tomography (CT)?

Computed Tomography is often also referred to as a CT scan. Computed Tomography (CT) uses X-rays to image the inside of the body. Unlike an X-ray machine that uses X-rays for imaging, it uses a motorized X-ray source that rotates around the circular opening of a ring-shaped structure. In this way, it obtains multiple images of the body in series rather than a flat, 2-dimensional image.

In Which Diseases Is Computed Tomography (CT) Used?

Computed Tomography (CT) can be used in the diagnosis of many conditions. The most common uses of Computed Tomography can be listed as follows;

Musculoskeletal system problems such as fractures, arthritis, and bone infections
Diagnosis of internal injuries occurring after accidents or trauma
Diagnosis of cancers seen in many parts of the body, including the liver, pancreas, lungs, and ovaries
Cardiovascular diseases such as coronary artery disease, aneurysms, and blood clots.
Neurological disorders such as brain tumors, traumatic brain injuries, and intracranial bleeding
Computed Tomography (CT) can be used in abdominal and pelvic conditions, including appendicitis, kidney stones, diverticulitis, and intestinal disorders.

Computed Tomography may not be used only for the diagnosis of diseases. In addition to these;

It may be an alternative for patients who have metal implants and cannot undergo Magnetic Resonance (MR).
Computed Tomography (CT) may be used for surgical preparation before tumor surgeries.
Computed Tomography is also used to monitor chronic conditions such as cancer.
In some cases, Computed Tomography (CT) may also be used to guide procedures such as surgery, biopsy, and radiotherapy.

How Is Computed Tomography (CT) Performed?

Go to your Computed Tomography (CT) scan wearing comfortable clothing.
Remove any metal jewelry that could reduce the quality of the scan.
During a Computed Tomography (CT) scan, the patient lies on a table. Depending on the area to be imaged, the patient may be asked to lie face down or on their back on the table.
The table on which the patient is lying enters the circular Computed Tomography (CT) device.
The radiology technician performing the scan will control the scanner from another room. They will be able to hear you and speak with you during the Computed Tomography (CT) scan.
When the table enters the Computed Tomography (CT) device, you will be asked to remain still. If the patient moves during the scan, the quality of the images may be reduced.
You may be asked to hold your breath from time to time during the Computed Tomography (CT) scan.
Although Computed Tomography (CT) is relatively quieter than MR, you may hear sounds during the scan from time to time.
When the Computed Tomography (CT) scan is finished, the table moves back out of the scanner.

Contrast-Enhanced Computed Tomography (CT) Scan

Computed Tomography (CT) scans can sometimes also be performed with the administration of a special contrast agent. The purpose is to make tissues that are difficult to distinguish more visible. When contrast material is not used, most soft tissues in the body appear in a similar color on the scan. When contrast material is used, tissues with greater blood supply appear brighter or more distinct. Contrast material usually contains iodine.

You may be asked to come to the contrast-enhanced scan on an empty stomach. Although fasting may vary depending on the area to be scanned, it is important for scans of the abdomen or pelvis.
Unless your doctor tells you otherwise, you can continue taking your medications.
It will be determined whether you have an allergy to the contrast material to be used in the contrast-enhanced scan. Likewise, because the contrast material will be filtered by the kidneys, your kidney function should also be checked.
If you are pregnant or think you may be pregnant, share this with your doctor.
The contrast material can be given in different ways before the scan. It may be administered orally or intravenously, and in colon and rectal scans it may also be given rectally.
After the contrast material is given, you may feel a metallic taste in your mouth. You may also feel warmth in your body due to the contrast material.

FREQUENTLY ASKED QUESTIONS ABOUT COMPUTED TOMOGRAPHY (CT)

What Does It Mean That Computed Tomography Has 128 Slices?

Tomography captures multiple images of the body during the scan rather than showing a 2-dimensional image like an X-ray. While doing this, it combines X-ray images taken from different angles. In this way, it creates cross-sectional images of the bones, vessels, and soft tissues. Computed Tomography uses detectors inside the device while obtaining these slices. The expression Computed Tomography (CT) 128 slices indicates that 128 detectors take slices during the scan. This increases scan speed and reduces the radiation dose.

What Are the Advantages of 128-Slice Computed Tomography?

Unlike traditional tomography scanners with fewer slices, 128-slice Computed Tomography allows more images to be obtained in a shorter time.

This feature offers certain advantages.

128-slice Computed Tomography (CT) obtains images in a very small fraction of a second. This reduces the time patients need to remain still and minimizes the risk of motion-related artifacts.
128-slice tomography provides high-resolution images that allow better visualization of small structures and abnormalities.
Thanks to its advanced technology, it helps minimize radiation exposure. It is a safer option, especially for patients who need to undergo multiple Computed Tomography scans.
It allows the evaluation of dynamic processes such as blood flow and organ function.

How Does Computed Tomography Work?

Computed Tomography (CT) involves several advanced technologies working together.

As the tomography machine rotates around the patient, it contains a rotating X-ray tube that emits radiation beams.
Opposite the X-ray tube, a series of detectors captures the X-rays passing through the body. The 128-slice configuration means there are multiple rows of detectors, which allows simultaneous image acquisition.
The captured data is sent to a computer, where advanced algorithms reconstruct the images into cross-sectional slices. These slices can be viewed individually or combined to create a 3-dimensional representation.
The final images produced by tomography are analyzed by radiologists specially trained in this field, and detailed reports are provided to the referring doctor.

What Are the Advantages of Computed Tomography?

The advantages of Computed Tomography (CT) can be listed as follows:

Detailed imaging: The tomography imaging method provides a detailed image of the bones, tissues, and organs, allowing an accurate diagnosis.
No surgery required: Tomography scans are usually performed within minutes and without any surgical incision. In other words, it is a noninvasive procedure.
Ability to diagnose different conditions: It can be used to diagnose many different conditions such as infections, tumors, fractures, and blood clots.
Guides treatment plans: Computed Tomography scans also greatly help in planning biopsies and radiation therapy.
Monitoring disease progression: Thanks to tomography imaging, the progression of some diseases such as cancer can be effectively monitored.

What Are the Harms of Computed Tomography? (Computed Tomography Risks)

Computed Tomography is generally a safe imaging method. However, one of the most commonly asked questions concerns the problems that may be caused by the radiation exposure during the scan. Computed Tomography is an imaging method used when deemed necessary by a doctor and should be performed in centers equipped for this purpose.

What Are the Risks of Contrast-Enhanced Tomography? What Are the Side Effects of Contrast-Enhanced Tomography?

In many tomography scans, contrast material is used to improve image quality. This method, also known as contrast-enhanced tomography, has possible side effects.

Allergic reactions: It can cause allergic reactions ranging from mild itching to severe anaphylactic shock. It is important for patients to inform healthcare professionals of any known allergies before the scan.
Kidney Damage: Contrast agents may also affect kidney function, especially in people who already have kidney problems. This condition is known as Contrast-Induced Nephropathy. Patients with kidney failure should discuss the risks with healthcare professionals before having a contrast-enhanced scan.

Very rarely;

Shortness of breath
Swelling in the throat or in different parts of the body may occur.

Contrast-enhanced tomography is an imaging method that should be performed in centers equipped for this purpose.

Who Is Not Suitable for a CT Scan?

Some people who are not suitable for Computed Tomography (CT) imaging are as follows:

Pregnant women: Pregnant women, especially those in the first trimester, should avoid Computed Tomography (CT) scans because of the risk of fetal radiation exposure.
People with allergies: In some cases, MRI may be performed instead of tomography for people who are allergic to iodine-based contrast agents.
People with kidney problems: It is important for people with kidney disease to inform their doctor before a tomography scan. This is because the contrast agents used in contrast-enhanced tomography can cause kidney failure, especially in people with underlying kidney problems or dehydration.
Children: In general, doctors do not recommend tomography scans for children because of the risk of radiation exposure
People with claustrophobia: People with fear of enclosed spaces should inform the radiology technician or doctor before the scan. Low-dose sedatives may be used before the scan to help calm them.

How Long Does Computed Tomography Take?

The duration of Computed Tomography (CT) scans can vary depending on the area to be imaged and the condition. In general, Computed Tomography scans take 15 minutes to 1 hour. This includes the preparation time before the tomography scan.

Do I Need to Stay in the Hospital After Computed Tomography?

Computed Tomography (CT) scans are a noninvasive imaging method that does not require surgery. For this reason, you can return to your normal life after the Computed Tomography scan. However, it is beneficial for people who have had contrast-enhanced tomography to stay in the hospital for a while after the scan to monitor for allergic reactions.

What Other Imaging Methods Can I Choose Instead of Computed Tomography?

Various imaging methods are used for the diagnosis and treatment of diseases in addition to Computed Tomography. However, it is important to follow your doctor's guidance on which method should be used. Other methods include:

Magnetic Resonance Imaging (MR): Magnetic Resonance (MR) uses magnetic fields and radio waves instead of radiation. Although MR is excellent for soft tissue imaging, it may not be suitable for all situations.
Ultrasound: This imaging technique uses sound waves to create images of soft tissues. It is often used in pregnant women and children. Ultrasound does not carry a radiation risk, but it may not provide the level of detail required for some diagnoses.
X-ray: It involves low doses of radiation and may be sufficient for certain conditions. However, it may provide less detailed images.

Is Computed Tomography Performed on an Empty Stomach or After Eating?

Especially before contrast-enhanced tomography scans, a 4-hour fast may be required. Fasting is especially important for scans of the digestive system. However, many routine tomography scans can also be performed after eating.

Is Computed Tomography a Painful Procedure? Does Tomography Hurt?

Tomography is not a painful or distressing imaging method. It is necessary to remain still during Computed Tomography (CT) scans. After contrast-enhanced tomography scans, patients may experience allergic reactions or other side effects. It is very important for these procedures to be performed by experienced specialists in well-equipped centers.

What Is the Difference Between Computed Tomography and Magnetic Resonance (MR)?

The biggest difference between Computed Tomography (CT) and Magnetic Resonance (MR) is that tomography uses X-rays for imaging, while MR uses radio waves.
MR imaging takes a little longer than tomography.
Magnetic Resonance (MR) imaging provides detailed visualization of tissues. Computed Tomography (CT), on the other hand, shows the structure of bones in greater detail.

Can Pregnant Women Have Tomography Scans?

One of the most frequently asked questions during pregnancy is whether tomography can be performed. Because of the risk of radiation exposure to the unborn baby, expectant mothers are understandably concerned about this. The unborn baby is considered more sensitive to the harmful effects of radiation than adults or children.

However, there is no scientific evidence showing that tomography of the head or chest during pregnancy harms the unborn baby. However, imaging the abdomen or pelvis with Computed Tomography may increase the risk. MRI or ultrasound may need to be preferred for imaging these areas.

Does a Person Who Has Had a Computed Tomography Scan Emit Radiation?

X-rays are used during tomography. This allows the internal structures of the body to be imaged. However, a person who has had Computed Tomography (CT) does not become radioactive. In other words, they do not emit radiation to their surroundings.

Can Children Have Tomography Scans?

Computed Tomography (CT) scanning is an imaging technique used in people of all ages, including children.

However, children are expected to have longer life expectancies than adults. Therefore, it is recommended that they be exposed to less radiation.

However, in emergencies and when it is deemed very necessary, the tomography machine can be programmed to deliver the lowest possible dose for diagnosis.

Thanks to advanced computed tomography devices such as 128-slice tomography, it is possible to perform a tomography scan much faster and with much less radiation exposure.

How Is Tomography Performed in Children?

It can be difficult for children or infants to remain still during Computed Tomography (CT) scans. Although tomography scans in children and infants are performed very quickly, sedatives may be given to help them stay still.

When Are Tomography Results Ready?

Computed Tomography (CT) results may be ready within a few hours depending on the area to be scanned. However, it may take a few days for the specialist radiologist to review and report these images.