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Doctor insights on: Computerized Tomography Ct Scan

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Is a spiral (helical) computerized tomography CT of the chest the same thing as a high-resolution CT scan?

Is a spiral (helical) computerized tomography CT of the chest the same thing as a high-resolution CT scan?

No: Essentially all ct now is spiral. High resolution ct of the chest is a special exam to evaluate the lung tissue using very fine slices and special image manipulation to see fine detail in the tubes and air sacs of the lung. ...Read more

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Dr. Barbara Lavi
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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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What is computerized tomography (ct)

Imaging...: A 'ct' scan is a very sophisticated imaging procedure designed at taking detailed pictures of one's bodies; to help the doctors better pinpont the causes of what ails you. ...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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Why not perform full body computerized axial tomography scans on everyone with major diseases?

Poor use of resource: In addition to the risk of radiation exposure, cost, and inefficient use of healthcare resources, it often reveals incidental findings that have no impact on patient's health and triggers additional testing. ...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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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

Dr. Michael Korona
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Ct Scan (Definition)

Ct scan uses data from a beam of xrays and reconstructs a cross sectional image of your body. It is a high dose of xrays and used only when the benefits outweigh the risk. Cancer risk is 1 in 500 in children. Also using iodinated contrast might cause transient renal failure in about 5% of patients. (contrast induced nepropathy) most do not explain this to the patient as ...Read more


Tomography (Definition)

"tomo" comes from the greek word for "cut" or "slice". "graph" comes from the greek word for "writing" or "drawing". Computed tomography (or ct) uses a computer to form/make/draw many separate image slices of the inside ...Read more