Five Key Insights to Assist You in Exam Preparation

A CT scan provides physicians with an intricate view of the internal structures of your body, enabling them to identify a variety of medical issues and to devise and track treatment plans. Here are five essential facts about CT scans to assist you in preparing for your examination. Additionally, consult your healthcare provider regarding the scheduling of your CT scan at UVA Radiology and Medical Imaging.

1. A CT Scan Captures Images in Cross-Sections

A CT scan represents advanced medical imaging technology that offers doctors a comprehensive view of your body. Similar to x-rays, CT scans utilize ionizing radiation to generate a series of images from multiple perspectives. These images resemble “slices” that, when combined, form a singular, highly detailed representation.

CT scans are employed for various purposes, including locating tumors and assessing internal bleeding following an injury. Physicians utilize CT imaging to plan surgical interventions and other medical procedures, as well as to monitor ongoing conditions and treatments.

The abbreviation “CT” in “CT scan” stands for computerized tomography. The process is managed by a computer, hence the term “computerized.” “Tomography” is derived from the Greek word “tomos,” which translates to “slice” or “section.”

2. The Scanner Resembles a Large Ring or Donut

The CT (Computed Tomography) scanner is typically found in hospital laboratories. It represents a blend of healthcare, medical technology, and advanced diagnostic equipment.

During the procedure, a radiologic technologist will assist you throughout the process. You will begin by lying on a table that is part of the CT machine, which resembles a large ring or donut spacious enough to accommodate both you and the table. As the examination proceeds, the table will slide into the machine’s opening, known as the bore.

Once positioned, the internal components of the CT machine will rotate around you, although the casing of the machine will prevent you from seeing this movement. You will hear loud whirring sounds as the internal mechanisms operate. Depending on the specific body part being examined, the CT machine may also move over you during the scanning process.

3. Remaining Still During the Scan is Essential

It is crucial to remain as still as possible during a CT scan, as any movement can result in a blurred image. Even minor actions, such as breathing, can impact the quality of the scan. Depending on the area being examined, the technologist may request that you hold your breath for a short period.

The duration of your scan may range from a few minutes to an hour. Throughout the procedure, you will have the ability to communicate with the radiologic technologist via an intercom system should you feel any discomfort or anxiety.

4. Some CT Scans May Involve Contrast Dye

In certain situations, a CT scan may require the administration of medical contrast dye. If this is necessary, you will be instructed to take the dye either orally or through an intravenous line, depending on the specific procedure. This will extend the overall time of the scan, as the contrast needs time to circulate within your body.

5. CT Scans Utilize Radiation Similar to Traditional X-Rays

CT scans employ radiation, which, in significant amounts, can elevate a patient’s risk of developing cancer. However, it is important to note that the likelihood of cancer resulting from a CT scan is very low.

Your physician has determined that the benefits of the examination outweigh the risks associated with radiation exposure. The insights gained from a CT scan can be vital for making accurate diagnoses and formulating treatment plans. Ultimately, a CT scan may provide essential information regarding your health.

If you have concerns about radiation exposure, inquire about alternative imaging options that may be available instead of a CT scan. Additionally, consult with your doctor to ensure that your lifetime radiation exposure remains within a safe range. You can also utilize an online calculator to assess your lifetime radiation risk or refer to our article on radiation.

Experience Your CT Scan at UVA Health
No matter the specifics of your CT scan, the radiologists and radiologic technicians at UVA Radiology and Medical Imaging are dedicated to ensuring a positive experience for you. They will strive to provide clear explanations throughout the process.