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The guidelines give specific parameters to use when coding laboratory tests as panels. What determines when certain tests can be reported as a panel? What specific directions are given?
AMA staff reviews all correspondence to evaluate coding suggestions. If AMA staff determines that the Panel has already addressed the question, staff informs the requestor of the Panel's interpretation. [ However, if staff determines that the request is a new issue, or significant new information is received on an item that the Panel reviewed previously, the request is referred to appropriate
members of the CPT Advisory Committee. If the advisors agree that no new code or revision is needed, AMA staff provides information to the requestor on how to use existing codes to report the procedure. Read more at ]
Expert answered|bubulizzz|Points 148|
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Asked 1/26/2012 10:24:58 AM
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What is the difference between a CAT scan and an MRI? Is there a time when a physician would prefer to use one procedure over another?
Weegy: A computed tomography (CT) scanner uses X-rays, a type of ionizing radiation, to acquire its images, making it a good tool for examining tissue composed of elements of a relatively higher atomic number than the tissue surrounding them, [ such as bone and calcifications (calcium based) within the body (carbon based flesh), or of structures (vessels, bowel). MRI, on the other hand, uses non-ionizing radio frequency (RF) signals to acquire its images and is best suited for non-calcified tissue. CT may be enhanced by use of contrast agents containing elements of a higher atomic number than the surrounding flesh (iodine, barium). Contrast agents for MRI are those which have paramagnetic properties. One example is gadolinium. Both CT and MRI scanners can generate multiple two-dimensional cross-sections (slices) of tissue and three-dimensional reconstructions. Unlike CT, which uses only X-ray attenuation to generate image contrast, MRI has a long list of properties that may be used to generate image contrast. By variation of scanning parameters, tissue contrast can be altered and enhanced in various ways to detect different features. (See Application below.) MRI can generate cross-sectional images in any plane (including oblique planes). CT was limited to acquiring images in the axial (or near axial) plane in the past. The scans used to be called Computed Axial Tomography scans (CAT scans). However, the development of multi-detector CT scanners with near-isotropic resolution, allows the CT scanner to produce data that can be retrospectively reconstructed in any plane with minimal loss of image quality. For purposes of tumor detection and identification, MRI is generally superior. However, CT usually is more widely available, faster, much less expensive, and may be less likely to require the person to be sedated or anesthetized. ] (More)
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