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.

scan

(skan),
1. To survey by traversing with an active or passive sensing device.
2. The image, record, or data obtained by scanning, usually identified by the technology or device employed; for example, CT scan, radionuclide scan, ultrasound scan, etc.
3. Abbreviated form of scintiscan, usually identified by the organ or structure examined; for example, brain scan, bone scan, etc.

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.

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.

scan

(skăn)
v.
1. To direct 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 direct x-rays or other energy at (a body or body part) in order to produce an image, as with a CT scanner.
n.
1. The act or an instance of scanning.
2. The action or process of scanning a body or body part.
3. A picture or an image produced by this means.

scan′na·ble adj.
scan′ner n.

scan

See scanning.

scan

Imaging
A popular short form for the “hard copy” of various imaging procedures—e.g., scintiscan, CT scan—often using radioactive materials to diagnose, stage and monitor disease.
 
Types
Liver, bone, CT and MRI scans.

Virology
See Virus scan.
 
Vox populi
Tattoo scan, see there.

SCAN

Suspected child abuse or neglect, see there.

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.

scan

(skan)
1. To survey by traversing with an active or passive sensing device.
2. The image, record, or data obtained by scanning, usually identified by the technology or device employed; e.g., CT scan, radionuclide scan, ultrasound scan.
3. Abbreviated form of scintiscan, usually identified by the organ or structure examined; e.g., brain scan, bone scan.

scan

visual image produced by magnetic resonance imaging (MRI), computed tomography (CT), ultrasound (US) or radionucleotide investigation

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).

scan

(skan)
1. To survey by traversing with an active or passive sensing device.
2. Image, record, or data obtained by scanning, usually identified by technology or device employed.

scan

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

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.

Patient discussion about scan

Q. Anybody to tell me more about MRI scan? had an MRIscan and this has snown adenocarcinoma of endometrium early stage There is no lymphatic involvement but is it possible an MRIscan to miss some tumor?

A. MRI is a very effective machine but it has it's limits. it has a great resolution but will not see very small tumors. therefore- it can miss metastasis sometime. but if your adenocarcinoma is in early stage- it might not sent metastasis. they did a biopsy? that can give you some idea what to expect.

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'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.

More discussions about scan