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How Does The Radioactivity Affect Someone After The Myocardial Perfusion Scan
Cancer risk: It is important to remember that tests commonly done, such as myocardial perfusion scans, ct scans, and plain xrays, expose you to radiation. It adds up. There is an increased incidence of cancer many years later. We cannot practice medicine without those tests but they should only be performed when absolutely necessary. You should question the need for tests involving radiation exposure. ...Read moreSee 2 more doctor answers
Patient is injected intravenously with isotope tagged to chemical hida that is extracted preferentially by liver cells mimicking bile. Some of this is stored in gall bladder and some enters small bowel from common bile duct. Cholecystokinin is a natural hormone slowly injected intravenously to stimulate gall bladder contraction. Normal function has at least 50% ...Read more
Not usually: Caffeine in the usual dietary dose won't affect an exercise stress test with thallium imaging, but if you ingest caffeine recently you cannot have a stress test with pharmacologic stress using Persantine (dipyridamole), Adenosine or Lexiscan because the caffeine interferes with the metabolism of those agents. ...Read moreSee 2 more doctor answers
Usually not much: Metal can block the gamma rays that are emitted by the patient, and block the xrays from the ct portion of the pet/ct, which can create errors on one portion of the exam (called the attenuation corrected scan). However, the original pet data from the scan (uncorrected) is always available for review, so if the standard images have artifact on them, the uncorrected images can be reviewed. ...Read moreSee 2 more doctor answers
Less tha an hour: And probably more like 30 -40 minutes, maybe not even this long. I think it has to do with how new the machine is. Some very new machines have faster acquisition times. The radiologist should be able to provide a more exact answer as to the length of time for this imaging test. ...Read more
It leaves: The body through the kidneys.Get a more detailed answer ›
See blood flow: Myocardial perfusion studies show the pattern of blood flow (perfusion) to the tissue of the heart muscle. The radiotracer goes where the blood goes and this shows how well the tissue is nourished. It can be an indicator of blocked arteries when the perfusion pattern is abnormal. ...Read more
After taking the Persantine thallium test my dr., informed me of the following; Decreased count rate in the anterior wall; reversible ischemia;; ?
Cannot be sure it is: While decreased count in the anterior wall may be caused by ischemia( inadequate blood flow), there are frequently other causes. In females, decreased anterior wall counts may be an artifact due to the interposition of the breast between the camera and the heart. In true ischemia ,decreased count would be present only in the stress images. Please confirm this with your physician. ...Read more
Very fast: Today's high speed scanners work very quickly. This exam should take around 10 minutes at the most. ...Read more
Ensure blood supply: The question is a little vague but i will try to explain. The small arteries to the heart (the coronary arteries) are what supply blood to the hearyt to keep it pumping. The big artery from the heart supplies the systemic circulation. If the small arteries get blocked, then you have a heart attack and may die. Any surgical proceedure may put enough stress on the heart to have a heart attack. ...Read more
No: Heart failure is a clinical diagnosis - you have certain symptoms, such as shortness of breath and easy fatigue-ability, and if they are connected to abnormal heart function you may be diagnosed with heart failure. An ECG usually discloses underlying heart rhythm disturbances or the presence of coronary artery blockages, though much more can be detected. ...Read moreSee 2 more doctor answers
Malaria: If the therapy is effective against the strain of plasmodium you have there should be a rapid (within a day) disappearance of the parasite from the erythrocytes, and free gametocytes should also not be present. If you are still showing positive results on blood smears you may have a resistant organism. Hope you are better soon. ...Read more
What is the difference between nuclear medicine radiation and ct/x-ray? Is it true that the only radiation you receive in nuclear medicine is the radioactive tracer that is administered into your vein? If so, does this radiation not accumulate as ct/x ray
Yes.: In nuclear medicine a radioactive "tracer" (e.g. Technetium) is injected into a vein and the gamma rays are emitted from the body and detected by a gamma camera placed against the body to create an image. The radioactivity decays over time and is also excreted from the body. With ct, the x-rays are passed through the body from an xray tube to create an image and do not reside in the body. ...Read moreSee 2 more doctor answers
Approximately how long after a stroke does it take for brain tissue to fully decompose and does it appear with the same density as CSF on a CT scan?
It depends: The size and type of the stroke, ischemic vs hemorrhagic, are the most important predictors. For most ischemic strokes, the majority of liquifaction necrosis (the decomposition) takes place in a few weeks but continued healing will continue after the necrosis. For hemorrhagic strokes, it typically takes longer for the body to absorb the blood and complete the healing process. ...Read moreSee 1 more doctor answer
Is a malignant condition that may have the appearance of eczema, with skin changes involving the nipple of the breast. The incidence is approximately around 3%. Most of them are also associated with underlying breast cancer. Biopsy should be done to confirm. Mammogram, sonogram and perhaps MRI breast should be done-depending on the case to ...Read more
Biological therapy means treatment with agents that are natural biologic products (such as antibodies from other species, etc.). The new drugs like Humira (adalimumab) (that are constantly advertised on tv) are examples; these are usually used for immune caused diseases like ulcerative colitis, rheumatoid ...Read more
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