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Doctor insights on: How Does The Radioactivity Affect Someone After The Myocardial Perfusion Scan

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How does the radioactivity affect someone after the myocardial perfusion scan?

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 more

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Dr. Joseph Accurso
322 doctors shared insights

Hida Scan (Definition)

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


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How does caffeine affect the results of thallium myocardial perfusion scan?

How does caffeine affect the results of thallium myocardial perfusion scan?

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 more

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How does metal affect the results of a pet scan?

How does metal affect the results of a pet scan?

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 more

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How long does a MRI scan of the kidneys take?

How long does a MRI scan of the kidneys take?

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

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How long does an MRI of the brain take?

How long does an MRI of the brain take?

Read more here: Please see this articles (and its related articles) for a good summary of info on the actual MRI procedure: http://www.Conciergeradiologist.Com/mri-procedure.Html. ...Read more

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After an angiogram, how does the dye come out of the body?

After an angiogram, how does the dye come out of the body?

Kidneys: The contrast agent is filtered from the body by the kidney. This can take a day or so. Drinking fluids after the exam helps increase the rate of removal and helps protect the kidneys. ...Read more

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Can you tell me about the purpose of a myocardial perfusion scan [nuclear test]?

Can you tell me about the purpose of a myocardial perfusion scan [nuclear test]?

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

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After taking the Persantine thallium test my dr., informed me of the following; Decreased count rate in the anterior wall; reversible ischemia;; ?

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

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What does this mean? The liver has peak SUV of 3.2 compared to on the prior scan.

What does this mean?
 The liver has peak SUV of 3.2 compared to  
on the prior scan.

SUV=Std Uptake Value: The use of standardized uptake values (SUVs) is now common place in clinical FDG-PET/CT oncology imaging, and has a specific role in assessing patient response to cancer therapy. Read more at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3026294/ ...Read more

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How long does radiation stay in your body after abdominal ct scan?

How long does radiation stay in your body after abdominal ct scan?

No radiation: stays in your body after the scan. The radiation passes through your body during the scan to make the CT image. ...Read more

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How long does the thoracic spine CT scan with dye take?

Very fast: Today's high speed scanners work very quickly. This exam should take around 10 minutes at the most. ...Read more

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How does pneumonia affect the ventilation – perfusion ratio?

How does pneumonia affect the ventilation – perfusion ratio?

Lowering ventilation: Pneumonia decreases the lungs ability to fully expand. This decreases ventilation and has little effect on perfusion. Therefore you have a decreased v/q ratio. ...Read more

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How does tiny arteries to the heart affect procedures?

How does tiny arteries to the heart affect procedures?

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

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What are the uses of electrocardiogram .Does it can detect heart failure ..?

What are the uses of electrocardiogram .Does it can detect heart failure ..?

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 more

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After malaria treatment how long does the result still positive in the blood stream ?

After malaria treatment how long does the result still positive in the blood stream ?

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

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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

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 more

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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?

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 more

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Dr. M. Hytham Beck
16 doctors shared insights

Paget Disease Of The Nipple (Definition)

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


Dr. Krishna Kumar
4 doctors shared insights

Biological Therapy (Definition)

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