- CT lung screening scans look for early signs of lung cancer and other abnormalities.
- CT calcium scoring scans measure the buildup of calcium on the walls of coronary arteries, a sign of heart disease and potential heart attacks.
John Lyons, MD
Location and Office HoursJohn S Lyons MD
9 Hampton Ridge
Westwood, NJ 07675
- Great-West Healthcare Cigna
- MVP Health Plan
- United Healthcare
- Jersey City Medical Center
What kind of CT scan can help someone at risk for lung cancer?
Baptist Health South Florida answeredIf you are at risk for lung disease, you may benefit from one or both of the following CT screening scans:
How does a computed tomography (CT) scanner work?
Anthony Komaroff, MD, Internal Medicine, answeredTraditional computed tomography (CT) devices are doughnut-shaped machines that house rotating x-ray tubes that take pictures of thin "slices" of your anatomy. A computer assembles these images into a three-dimensional picture. Older CT scans weren't fast enough to capture the beating heart, since the heart's movement blurred the images of the arteries on most scans. It was like trying to take a photograph of a speeding car with a slow shutter speed.
Two developments now make it possible to get images sharp enough to actually see blockages inside the coronary arteries. First, beta blockers, such as atenolol (Tenormin) and metoprolol (Lopressor, Toprol XL), can slow the heartbeat, so doctors can get a better look.
Second, technology has improved, providing the equivalent of much faster film to photograph that speeding car. Traditional CT devices typically had four internal scanners. Now, 64 scanners have become the standard, and devices with 256 or even 320 scanners are used at some institutions. The greater the number of scanners, the better the resulting image. In a process called multidetector computed tomography (MDCT), these devices simultaneously take dozens of snapshots from different angles. These snapshots are then used to reconstruct a complete image of the inner workings of the arteries. A different technology, electron beam CT (EBCT), takes pictures with a rotating beam of electrons that circles the body far faster than an x-ray camera.
How will a testicular scan feel?
You may feel nothing at all from the needle puncture when the tracer is injected, or you may feel a brief sting or pinch as the needle goes through the skin. Otherwise, a testicular scan is usually painless. You may find it uncomfortable to remain still during the scan, especially if your testicles are sore. Ask for a pillow or blanket to make yourself as comfortable as possible before the scan begins.
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