scan (redirected from scans)

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.

2. the data or image so obtained.

3. shortened form of scintiscan.

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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, depicting time elapsed and echo strength and producing two-dimensional cross-sectional displays by movement of the transducer.

CAT scan , CT scan computed tomography, or the image obtained from it.

M-mode scan  the image obtained using M-mode echocardiography, showing the motion (M) over time of a monodimensional (“icepick”) section of the heart.

PET scan  positron emission tomography, or the image obtained from it.

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.

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scan (skn)

v.

1. To move a finely focused beam of light or electrons in a systematic pattern over a surface in order to reproduce or sense and subsequently transmit an image.

2. To examine a body or a body part with a CAT scanner or similar scanning apparatus.

3. To search stored computer data automatically for specific data.

n.

1. The act or an instance of scanning.

2. Examination of a body or body part by a CAT scanner or similar scanning apparatus.

3. A picture or an image that is produced by this means.

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scanna·ble adj.

scanner n.

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scan.

See scanning.

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scan,

n 1., the image produced by computer use of radiographic information.
v 2., to pass the focus of attention (e.g., over a particular muscle or group of muscles); to check or feel a particular part of the body or the body as a whole (e.g., to take note of tension present).

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scan

an image produced using a moving detector or a sweeping beam of radiation, as in scintiscanning, B-mode ultrasonography or computed tomography.

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scan generator

the basic mechanism in a scanning electron microscope, moving the beam across the specimen.

static scan

in ultrasonography, a static image built up by movement of the transducer sequentially over the body. Now largely replaced by real-time ultrasonography.

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SCAN

Suspected child abuse or neglect, see there

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scan

Imaging An image of internal body structures, often using radioactive materials, to diagnose, stage, and monitor disease Types Liver, bone, CT and MRI scans. See Abscess scan, Biliary scan, Bone density scan, Bone scan, Brain scan, CAT scan, Cold scan, Gastric emptying scan, Hepatobiliary scan, Liver-spleen scan, 111-Indium labeled leukocyte scan, Liver scan, Magnetic resonance imaging, Meckel's diverticulum scan, Myocardial infarction scan, Perfusion scan, PET scan, Radionuclide scan, Scintigraphy, Thyroid scan, Ventilation scan, Ventilation-perfusion scan, VIP-receptor scan, Virus scan noun A popular short form for the 'hard copy' of various imaging procedures–eg, scintiscan, CT scan.

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Patient discussion about scans.

Q. I am 15 weeks pregnant. I had my NT scan and blood draw today. Iam using my Hubby user name here.I am 15 weeks pregnant. I had my NT scan and blood draw today. I doubt whether I am in a risky state because I read in medical journal that women with certain amount of risk go for second trimester screening and not healthy pregnant women. Is it so? Please clarify?

A. There's something called an integrated sequential screening. You have the NT scan and blood draw in your first trimester, and then go back for an additional blood draw in your second trimester. They then calculate a unified result and present the results in the second trimester. Several other sources mentioned that often a high risk based on the NT scan and the first blood draw will prompt a diagnostic test. Yes, women with low or acceptable risk go on for the second trimester screening.

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.

Q. I'm worried if she has ADHD. Is there any MRI or brain scan test to diagnoses the problem? My daughter Elba is 15. She regularly goes to school but often forgets to do daily activities. I'm worried if she has ADHD. Is there any MRI or brain scan test to diagnoses the problem?

A. Although in general practice MRI is not carried out to diagnose ADHD, the studies have shown that the ADHD brain has considerably less activity than does a normal brain when MRI's are compared. Stimulant drugs increases the chemical activity level, which decreases the symptoms. I shall suggest you to consult a physician specialized in this area.