Radiology & Imaging

Total-body PET imaging exceeds industry standards

A performance evaluation of the uEXPLORER total-body PET/CT scanner showed that it exhibits ultra-high sensitivity that supports excellent spatial resolution and image quality. Given the long axial field of view (AFOV) of ...

Other

Scientists use ultraviolet light to disinfect CT scanners

The COVID-19 pandemic has sparked heightened awareness of cleaning and disinfecting procedures in many industries. Health care facilities have long been familiar with protocols for disinfecting tools and equipment, and now, ...

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.

Cardiology

Blood flow in the heart revealed in a flash

Researchers at Linköping University have for the first time been able to use information from computer tomography images to simulate the heart function of an individual patient. Some of the modeling methods they use were ...

Cardiology

Telemedicine ambulance may deliver faster stroke care

When experiencing a stroke, people who are brought to the hospital in an ambulance with a CT scanner and telemedicine capabilities are evaluated and treated nearly two times faster than people taken in a regular ambulance, ...

Cardiology

Specialized ambulance improves treatment time for stroke

Using an ambulance that included a computed tomography (CT) scanner, point-of-care laboratory, telemedicine connection and a specialized prehospital stroke team resulted in decreased time to treatment for ischemic stroke, ...

page 1 from 4

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.

This text uses material from Wikipedia, licensed under CC BY-SA