CT scan

CAT scan; Computed axial tomography scan; Computed tomography scan

A computed tomography (CT) scan is an imaging method that uses x-rays to create pictures of cross-sections of the body. Related tests include:Abdominal and pelvis CT scanCranial or head CT scanCervical, thoracic, and lumbosacral spine CT scanOrbit CT scanChest CT scan

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  • CT scan

    CT scan

    CT stands for computerized tomography. In this procedure, a thin X-ray beam is rotated around the area of the body to be visualized. Using very complicated mathematical processes called algorithms, the computer is able to generate a 3-D image of a section through the body. CT scans are very detailed and provide excellent information for the physician.

    CT scan

    illustration

  • CT scan of the brain

    CT scan of the brain

    A CT or CAT scan (computed tomography) is a much more sensitive imaging technique than x-ray, allowing high definition not only of the bony structures, but of the soft tissues. Clear images of organs such as the brain, muscles, joint structures, veins and arteries, as well as anomalies like tumors and hemorrhages may be obtained with or without the injection of contrasting dye.

    CT scan of the brain

    illustration

  • Intracerebellar hemorrhage - CT scan

    Intracerebellar hemorrhage - CT scan

    Intracerebellar hemorrhage shown by CT scan. This hemorrhage followed use of t-PA.

    Intracerebellar hemorrhage - CT scan

    illustration

  • Pulmonary nodule, solitary - CT scan

    Pulmonary nodule, solitary - CT scan

    This CT scan shows a single lesion (pulmonary nodule) in the right lung. This nodule is seen as the light circle in the upper portion of the dark area on the left side of the picture. A normal lung would look completely black in a CT scan.

    Pulmonary nodule, solitary - CT scan

    illustration

  • Neuroblastoma in the liver - CT scan

    Neuroblastoma in the liver - CT scan

    This CT scan of the upper abdomen shows a large tumor (neuroblastoma) on the person's right side (lower left side of picture). The tumor is behind the liver and is pushing the liver forward and may have possibly spread into the liver tissue.

    Neuroblastoma in the liver - CT scan

    illustration

  • Intra-abdominal abscess - CT scan

    Intra-abdominal abscess - CT scan

    CT scan of the pelvis showing a large intra-abdominal mass.

    Intra-abdominal abscess - CT scan

    illustration

  • Lymphoma, malignant - CT scan

    Lymphoma, malignant - CT scan

    This abdominal CT scan shows tumor masses (malignant lymphomas) in the area behind the peritoneal cavity (retroperitoneal space).

    Lymphoma, malignant - CT scan

    illustration

  • Cholecystitis, CT scan

    Cholecystitis, CT scan

    This is a CT scan of the upper abdomen showing cholecystitis (gall stones).

    Cholecystitis, CT scan

    illustration

  • Fatty liver - CT scan

    Fatty liver - CT scan

    A CT scan of the upper abdomen showing a fatty liver (steatosis of the liver). Note the liver enlargement and dark color compared with the spleen (gray body in lower right).

    Fatty liver - CT scan

    illustration

  • Bronchial cancer - CT scan

    Bronchial cancer - CT scan

    This chest CT scan shows a cross-section of a person with bronchial cancer. The two dark areas are the lungs. The light areas within the lungs represent the cancer.

    Bronchial cancer - CT scan

    illustration

    • CT scan

      CT scan

      CT stands for computerized tomography. In this procedure, a thin X-ray beam is rotated around the area of the body to be visualized. Using very complicated mathematical processes called algorithms, the computer is able to generate a 3-D image of a section through the body. CT scans are very detailed and provide excellent information for the physician.

      CT scan

      illustration

    • CT scan of the brain

      CT scan of the brain

      A CT or CAT scan (computed tomography) is a much more sensitive imaging technique than x-ray, allowing high definition not only of the bony structures, but of the soft tissues. Clear images of organs such as the brain, muscles, joint structures, veins and arteries, as well as anomalies like tumors and hemorrhages may be obtained with or without the injection of contrasting dye.

      CT scan of the brain

      illustration

    • Intracerebellar hemorrhage - CT scan

      Intracerebellar hemorrhage - CT scan

      Intracerebellar hemorrhage shown by CT scan. This hemorrhage followed use of t-PA.

      Intracerebellar hemorrhage - CT scan

      illustration

    • Pulmonary nodule, solitary - CT scan

      Pulmonary nodule, solitary - CT scan

      This CT scan shows a single lesion (pulmonary nodule) in the right lung. This nodule is seen as the light circle in the upper portion of the dark area on the left side of the picture. A normal lung would look completely black in a CT scan.

      Pulmonary nodule, solitary - CT scan

      illustration

    • Neuroblastoma in the liver - CT scan

      Neuroblastoma in the liver - CT scan

      This CT scan of the upper abdomen shows a large tumor (neuroblastoma) on the person's right side (lower left side of picture). The tumor is behind the liver and is pushing the liver forward and may have possibly spread into the liver tissue.

      Neuroblastoma in the liver - CT scan

      illustration

    • Intra-abdominal abscess - CT scan

      Intra-abdominal abscess - CT scan

      CT scan of the pelvis showing a large intra-abdominal mass.

      Intra-abdominal abscess - CT scan

      illustration

    • Lymphoma, malignant - CT scan

      Lymphoma, malignant - CT scan

      This abdominal CT scan shows tumor masses (malignant lymphomas) in the area behind the peritoneal cavity (retroperitoneal space).

      Lymphoma, malignant - CT scan

      illustration

    • Cholecystitis, CT scan

      Cholecystitis, CT scan

      This is a CT scan of the upper abdomen showing cholecystitis (gall stones).

      Cholecystitis, CT scan

      illustration

    • Fatty liver - CT scan

      Fatty liver - CT scan

      A CT scan of the upper abdomen showing a fatty liver (steatosis of the liver). Note the liver enlargement and dark color compared with the spleen (gray body in lower right).

      Fatty liver - CT scan

      illustration

    • Bronchial cancer - CT scan

      Bronchial cancer - CT scan

      This chest CT scan shows a cross-section of a person with bronchial cancer. The two dark areas are the lungs. The light areas within the lungs represent the cancer.

      Bronchial cancer - CT scan

      illustration


    Review Date: 7/3/2020

    Reviewed By: Jason Levy, MD, Northside Radiology Associates, Atlanta, GA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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