Cardiology

Given a grim prognosis, stroke survivor proved doctors wrong

Mark Kincaid greeted spectators coming to the high school football game as he collected donations for his son's baseball team. His daughter, a cheerleader, was on the field while his wife and one of their three sons watched ...

Oncology & Cancer

FDA approves drug for PET imaging of prostate cancer

(HealthDay)—The U.S. Food and Drug Administration approved the first drug for positron emission tomography (PET) imaging of prostate-specific membrane antigen (PSMA)-positive lesions in men with prostate cancer, the agency ...

Neuroscience

Point-of-care biomarker assay for traumatic brain injury

Intracranial abnormalities on CT scan in patients with traumatic brain injury (TBI) can be predicted by glial fibrillary acidic protein (GFAP) levels in the blood. These interim findings from the TRACK-TBI study are published ...

Oncology & Cancer

Lifesaving lung screens hit the road

(HealthDay)—Irene Johnson noticed a big, blue bus bearing the words "Breathe Easy" outside the Benton, Tenn., library during the 2019 Labor Day weekend.

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Computed tomography

Computed tomography (CT) is a medical imaging method employing tomography. Digital geometry processing is used to generate a three-dimensional image of the inside of an object from a large series of two-dimensional X-ray images taken around a single axis of rotation. The word "tomography" is derived from the Greek tomos (slice) and graphein (to write). Computed tomography was originally known as the "EMI scan" as it was developed at a research branch of EMI, a company best known today for its music and recording business. It was later known as computed axial tomography (CAT or CT scan) and body section röntgenography.

CT produces a volume of data which can be manipulated, through a process known as "windowing", in order to demonstrate various bodily structures based on their ability to block the X-ray/Röntgen beam. Although historically the images generated were in the axial or transverse plane, orthogonal to the long axis of the body, modern scanners allow this volume of data to be reformatted in various planes or even as volumetric (3D) representations of structures. Although most common in medicine, CT is also used in other fields, such as nondestructive materials testing. Another example is the DigiMorph project at the University of Texas at Austin which uses a CT scanner to study biological and paleontological specimens.

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