The computed tomography scanner, or CT scanner, was originally designed to provide cross-sectional images of the brain. The word tomography comes from the Greek word tomos, meaning "section," and graphia, meaning "picture."
The computed tomography scanner, or CT scanner, was originally designed to provide cross-sectional images of the brain. The word tomography comes from the Greek word tomos, meaning "section," and graphia, meaning "picture."
The patient lies still on a special table which slides into a round tunnel, called a gantry. The technician can then rotate the gantry or move it forward and backward in order to obtain the necessary view.
In many cases, a patient must be given a contrast material before undergoing a CT scan. During "dynamic CT scanning," iodine dye is either injected into the blood or added to a drink that the patient must ingest.
Yeah, let's get to the Passport Control kiosks before the crowds. Ugh, I seem to be putting my passport in the wrong way. I never remember how to scan it!
The computed tomography scanner, or CT scanner, was originally designed to provide cross-sectional images of the brain. The word tomography comes from the Greek word tomos, meaning "section," and graphia, meaning "picture."
Physicians order CT scans for a number of different reasons including searching for and assessing: tumours, cysts, kidney stones, and bone injuries. Without CT scans, surgeons would have to perform many needless operations.
In rare cases, patients who receive the contrast material have an allergic reaction. Contrast material also causes water loss and is avoided when scanning patients who suffer from kidney failure.
The X ray dye makes it easier to see the organs and blood vessels when the pictures are developed. The intravenous contrast material is used for chest or pelvic scans, while oral-contrast material is used for abdominal scans.
In many cases, a patient must be given a contrast material before undergoing a CT scan. During "dynamic CT scanning," iodine dye is either injected into the blood or added to a drink that the patient must ingest.
Most emergency or shock-treatment centres contain a CT scanner in order to assess trauma victims. CT scans can pinpoint internal bleeding both in the brain and throughout the body.
Brain, chest, and abdominal CT scans are the most common, though physicians also rely on the CT scanner to guide their needles while draining an abscess or performing a biopsy.
The CT scanner is made up of several computer systems, including the host computer, which organizes the entire process. One computer converts the raw data into an image, while another lets the technician control the gantry.
Creating a scanner that could produce images at a faster rate was crucial in the development of tomography, as it reduced the degree of distortion in an image caused when patients breathed and moved.
While the original CT scans took Hounsfield several hours to reconstruct into a useful image, today's machines can produce an in-depth image in a fraction of a second.
Within four years of this development, CT scans, also called CAT scans (computed axial tomography), were restructured, allowing technicians to scan the entire body for evidence of tumours, injuries, and other abnormalities.
TSA spokesman Robert Gibbs said a controversial new screening would evolve with travellers' input. Some airline passengers are objecting to the use of revealing full-body scanners and pat-downs for those opting out of scans.
TSA spokesman Robert Gibbs said a controversial new screening would evolve with travellers' input. Some airline passengers are objecting to the use of revealing full-body scanners and pat-downs for those opting out of scans.
His career as a competitive athlete already in shambles from a doping scandal, Lance Armstrong announced he would step down as the chairman of his cancer foundation, Livestrong.
His career as a competitive athlete already in shambles from a doping scandal, Lance Armstrong announced he would step down as the chairman of his cancer foundation, Livestrong.
His career as a competitive athlete already in shambles from a doping scandal, Lance Armstrong announced he would step down as the chairman of his cancer foundation, Livestrong.
Researchers scrutinized brain activity during wine tasting. When they placed a $45 price on a $5 bottle, brain scans showed more pleasure than when the real budget price was left on.