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Doctor insights on: Single Photon Emission Computed Tomography

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What is the use of spect (single-photon emission computed tomography) in nuclear medicine?

Multiple : Spect is a modality of nuclear medicine imaging that allows for 3d imaging, therefore better for diagnostic purposes. Uses include scans of the bones, lungs, heart. ...Read more

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Dr. Lori Semel
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Computed Tomography (Definition)

Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! the image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more


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Will I get any medicine for pain when I go for the computed tomography?

No: A routine ct does not cause pain. Even if contrast is given, only a small IV is placed and no pain medicine is necessary. If you have an underlying condition that causes pain and limits your ability to lay on your back you may need to talk to the doctor requesting the exam to see if you should take medicine prior to the exam. ...Read more

Dr. Alvin Lin Dr. Lin
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For visiualization of the internal structure of human body, is it best to have computed tomography?

Dr. Alvin Lin Dr. Lin
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For visiualization of the internal structure of human body, is it best to have computed tomography?

No: It depends upon what you need to visualize. If you need to see the cerebellum, a ct scan doesn't work as well as an mri. If all you need is to look at the liver or kidneys, then an MRI is overkill compared to an easily accessible ultrasound. Plus, ct scans expose you to (unnecessary) radiation. So ask your family physician and radiologist what's the best way to find the information you need. ...Read more

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How common is it for someone to need a helical computed tomography?

Very Common Test: 'helical computed tomography' -- a cat scan -- is an immensely valuable test for evaluating diseases of every part of the body. Scanners are widely available, both in hospitals and in outpatient centers, and the images obtained provide valuable insight into many diseases. ...Read more

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What is the definition or description of: computed tomography angiogram cta?

Artery test: A special type of ct scan where intravenous dye is injected, and imaging is timed so that the arteries of interest are maximally opacified by the injected dye. Ct images in this test are acquired rapidly, and the actual scan will likely be done in a matter of seconds. Historically, evaluating the arteries required threading a catheter into the artery of interest. Cta is non-invasive. ...Read more

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Computed tomography test for chest pain?

Computed tomography test for chest pain?

ChestCT: Done in many emergency rooms as a way to look for pulmonary embolism, dissection of aorta, sometimes coronary artery blockage if contrast is used with specific protocols. ...Read more

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Is computed tomography angiogram cta a very common procedure?

Is computed tomography angiogram cta a very common procedure?

CT angiogram: It is being done much more often when it is necessary to visualize blood vessels (for example to see if there's a blockage). There is some radiation involved but it is considered much less "invasive" and has less complications than the regular type of "angiogram", where blood vessels are visualized by inserting thin tubes called catheters directly into them to inject a dye. ...Read more

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What is computed tomography stimulation?

What is computed tomography stimulation?

See below: I believe you are referring to the use of ct scanner in a new procedure for implanting deep brain stimulation electrodes to treat parkinson disease, & essential tremor, under general anesthesia. The following youtube video shows the procedure: http://www.Youtube.Com/watch?V=nc7cyadeo_c. ...Read more

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What is risk in regards to computed tomography?

Small: Xrays small risk of cancer. Contrast small risk of reaction or renal damage. Go to acr accredited scanner to be safe. See radiologyinfo.Org. ...Read more

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What is pitch when it comes to computed tomography?

What is pitch when it comes to computed tomography?

Amount: Table moves with each rotation of the x-ray tube in the scanner. ...Read more

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What is the definition or description of: computed tomography?

What is the definition or description of: computed tomography?

Image inside body: Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! the image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but often coronal or saggital. ...Read more

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What exposes the body to more: radiation bone scan or computed tomography?

What exposes the body to more: radiation bone scan or computed tomography?

CT vs bone scan: The amount of CT radiation exposure depends on the type of CT. Average effective radiation dose for bone scan is about 6 mSv. Dose for head CT is 2mSv, for abdomen CT is 8 mSv, and for CT angiogram 16mSv. ...Read more

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Which exposes the body to more radiation bone scan or computed tomography?

Which exposes the body to more radiation bone scan or computed tomography?

Sometimes same dose: Background radiation at sea level: 3 msv per year, denver residents get: 6 msv per year, cross country flight: 0.02 msv, x ray chest: 0.06 msv, ct head: 3 msv, ct chest: 5 msv (equivalent to 100 chest xrays) ct abdomen: 5-10, average bone scan 6.5 msv. Radiation depends on size of patient." radiation affects growing body in children more than adults. Doses to children are much less. ...Read more

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Who developed the first CT (computed tomography) unit? What did doctors use before then?

Who developed the first CT (computed tomography) unit? What did doctors use before then?

EMI: The Beatles company, Electronic Musical Instrument Co, EMI, produced the first CT scanner. Wikipedia has a great discussion of the history: http://en.wikipedia.org/wiki/X-ray_computed_tomography I was trained before CT was in use. We had to rely on our wits and some much more invasive tests. ...Read more

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Could computed tomography angiography show heart problems?

Could computed tomography angiography show heart problems?

CTA: Cardiac computed tomographic angiograpy is performed to try and diagnose cardiac anatomy and pathology. It doesn't diagnose everything but can provide very useful information that often yield a diagnosis if the study is ordered appropriately. ...Read more

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Which procedure exposes patients to more radiation: a bone scan or a computed tomography?

Which procedure exposes patients to more radiation: a bone scan or a computed tomography?

Sometimes same dose: Background radiation at sea level: 3 msv per year, denver residents get: 6 msv per year, cross country flight: 0.02 msv, x ray chest: 0.06 msv, ct head: 3 msv, ct chest: 5 msv (equivalent to 100 chest xrays) ct abdomen: 5-10, average bone scan 6.5 msv. Radiation depends on size of patient." radiation affects growing body in children more than adults. Doses to children are much less. ...Read more

Tomography (Definition)

Old fashioned tomograms used a moving x-ray source and flat detector to image at a certain depth in a patient. Most commonly this was used to image the kidneys. The most common tomograms used today are in cat scans, or computer assisted tomography. An x-ray source and multiple detectors spin around you, and the data is reconstructed by a computer into a slices, or ...Read more


Dr. Lori Semel
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Single Umbilical Artery (Definition)

normally has 2 arteries and 1 vein 4 different kinds Type 1-Most common comprising 98% of cases has2 patent vessles 1 an artery of the allentoin and the vein from the left umbelical vein this form is most associated with genito urinary abnormality usually associated with pregnancies in ...Read more