CT scan


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scan

 [skan]
1. to examine or map the body, or one or more organs or regions of it, by gathering information with a sensing device, such as a moving detector or a sweeping beam of radiation.
2. the data or image so obtained, often designated according to the organ under examination, such as a brain scan, kidney scan, or thyroid scan.
3. shortened form of scintiscan.
A-scan display on a cathode ray tube of ultrasonic echoes, in which one axis represents the time required for return of the echo and the other corresponds to the strength of the echo.
B-scan display on a cathode ray tube of ultrasonic echoes, in which the position of a bright dot on the tube corresponds to the time elapsed and the brightness of the spot to the strength of the echo; movement of the transducer across the skin surface yields a two-dimensional cross-sectional display.
CAT scan (CT scan) the image generated by computerized axial tomography.
HIDA scan a type of scan using a technetium 99m complex to assess hepatobiliary function.
thallium scan a scintiscan involving use of thallium 201; see also thallium scan.
ventilation-perfusion scan (V/Q scan) a scintigraphic technique for demonstrating perfusion defects in normally ventilated areas of the lung in the diagnosis of pulmonary embolism, consisting of the imaging of the distribution of an inhaled radionuclide followed by the imaging of the perfusion of the lungs by an injected radionuclide.

to·mog·ra·phy

(tō-mog'ră-fē),
Making of a radiographic image of a selected plane by means of reciprocal linear or curved motion of the x-ray tube and film cassette; images of all other planes are blurred ("out of focus") by being relatively displaced on the film.

CT scan

(sē′tē′)
n.
1. An image produced by a CT scanner.
2. The act or process of producing such an image.

CT scan

Computed tomography, see there.

CT scan (computed tomography scan)

The abbreviated term for computed or computerized axial tomography. The test may involve injecting a radioactive contrast into the body. Computers are used to scan for radiation and create cross-sectional images of internal organs.

Patient discussion about CT scan

Q. I get bad headaches had ct scans and m.r.i. even sinus surgery, suffering 2yrs now, dizzness occurs too..

A. If all prior medical investigations turned out normal, and sinus surgery didn't help relieve your symptoms, I would suggest the reason for your headaches is probably migraine attacks, that can cause severe headaches, and no CT scan or MRI can diagnose them. The diagnosis is made clinically, by your doctor. Migraine headaches can be eased by proper medications, before and during an attack. You should consult a neurologist.

More discussions about CT scan
References in periodicals archive ?
Early detection of RCC helps in improving prognosis9 therefore we conducted the study to determine the diagnostic accuracy of contrast enhanced CT scan in detecting renal cell carcinoma patients taking histopathology as gold standard.
Trauma scans and CT scans of obese patients are made easier.
This increases the exposure of patients to unnecessary radiations; radiations that could have otherwise been avoided if the ED physician had taken a detailed history and performed a thorough physical examination with reference to the standardized guidelines before ordering a CT scan.3 The increased radiation exposure is associated with increased incidence of malignancies in the population.7 Children are particularly more sensitive to repeated radiation doses.8 On the other hand, elderly patients in the population are also at an increased risk particularly if there is gross abuse of emergency CT scan services.7,8
When comparing CT scan findings to histopathology, 4 findings on a CT scan showed statistical significance to diagnose TB over carcinomatosis; smooth thickening of the peritoneum, abdominal mass, lymph node necrosis and high density ascitic fluid.
She said the CT scan at the facility was not functioning, and that patients were being turned away as a result.
Trauma related ICH 45 cases (50%) Hypertensive ICH 18 cases (20%) Aneurysm & AVM related ICH 19 cases (21.1%) Others like Amyloid angiopathy, 8 cases (8.9%) haemorrhagic metastasis& haemorrhagic Transformation of ischemic infarct Total Cases 90 cases Among 15 cases of haemorrhage secondary to aneurysms, the aneurysm is identified on MR TOF Angiogram sequence in 12 cases which is not evident on plain CT scan, in rest of the 3 cases the aneurysm is identified on further investigation with CT Angiogram.
De Lima had her CT scan at the Philippine Heart Center since the PNP General Hospital has no available CT scan machine to examine her liver mass.
This US FDA evaluated data from the company's multi-centre, prospective clinical study of 1,947 individual blood samples from adults with suspected mTBI/concussion and reviewed the performance by comparing mTBI/concussion blood tests results with CT scan results.
Talking to doctors, nurses, medical staff and attendants of the patients, Chief Minister Shahbaz Sharif said that treatment facilities are being improved with the investment of billions of rupees adding that latest CT scan machines have also been provided to the hospitals which will work round the clock and the patients will not have to suffer for the sake of their CT scans.
The CT scan (figure 2) revealed an acute on chronic large left frontotemporoparietal and a right frontoparietal subdural hematoma (SDH) with resultant left to right subfalcine herniation.
The postoperative CT scan was positive in 29 (18.5%) patients in which 16 (10.2%) cases required re-intervention.
The purpose of this study was to describe the current trends in neuroimaging of mentally ill patients as well as to demonstrate the value of the CT scan as it is currently utilised.