What's the Difference?

Computed tomography (CT) imaging is a sophisticated diagnostic technique that allows medical professionals to obtain detailed, cross-sectional images of the body. This in-depth information is instrumental in guiding treatment decisions and closely monitoring a variety of health conditions. On the other hand, computed tomography angiography (CTA) takes this imaging a step further by integrating a CT scan with a specialized dye or contrast material. This combination produces strikingly clear and vivid images of blood vessels and surrounding tissues in specific areas of the body, enabling precise evaluation and diagnosis of vascular conditions.

COMPUTED TOMOGRAPHY (CT)

Your doctor may recommend a CT scan to either confirm a suspected diagnosis or to uncover the underlying cause of certain symptoms you may be experiencing. This advanced imaging technique is invaluable for visualizing internal structures and can provide critical insights into a variety of medical concerns, such as:

  • **Acute Symptoms**: If you are suffering from sudden and severe symptoms like shortness of breath or chest pain, a CT scan can help identify the root cause, such as a pulmonary issue or heart problem.
  • **Blood Clots and Infections**: CT scans are effective tools for detecting blood clots that may obstruct blood flow, as well as infections that could threaten your overall health by revealing areas of inflammation or abscess.
  • **Delicate Fractures**: For fractures that may not be easily visible on standard X-rays particularly delicate ones in the hands, feet, or spine—a CT scan can provide detailed images that help assess the severity and exact location of the break.
  • **Trauma-related Injuries**: In the event of an accident, such as a car crash, a CT scan allows doctors to evaluate the extent of injuries to internal organs and tissues, guiding appropriate treatment.
  • **Neurological Concerns**: If there are any issues affecting brain function—such as unexplained headaches, seizures, or memory problems—a CT scan can assist in diagnosing conditions that may not be apparent through other means. In addition to adult cases, physicians rely on CT imaging to identify medical conditions in children, including congenital heart or kidney malformations, as well as more prevalent ailments like appendicitis. While primarily utilized for diagnostics, CT scans also play a pivotal role in guiding biopsies, which are procedures that involve extracting tissue samples for further analysis. Moreover, these scans aid in planning surgical interventions and evaluating bone mineral density, ensuring comprehensive care tailored to each patient’s needs.

COMPUTED TOMOGRAPHY ANGIOGRAPHY (CTA)

Angiography

Angiography is a minimally invasive medical test that assists physicians in diagnosing and treating various medical conditions. This procedure utilizes one of three imaging technologies, and in most cases, it involves injecting a contrast material to produce images of the blood vessels in the body.

Angiography can be performed using the following methods:

  • X-rays with catheters
  • Computed tomography (CT)
  • Magnetic resonance imaging (MRI)

Computed Tomography (CT) Angiography

CT angiography employs a CT scanner to generate detailed images of both blood vessels and surrounding tissues in different parts of the body. Typically, an iodine-rich contrast material (dye) is injected through a small catheter inserted into a vein in the arm. A CT scan is then conducted while the contrast flows through the blood vessels to the various organs. After the scanning process, the images are processed using specialized computer software and reviewed from different angles and projections.