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Is The Positron Emission Tomography Scan A Risky Thing To Do
Old fashioned tomograms used a moving x-ray source and flat detector to image at a certain depth in a patient. Most commonly this was used to image the kidneys. The most common tomograms used today are in cat scans, or computer assisted tomography. An x-ray source and multiple detectors spin around you, and the data is reconstructed by a computer into a slices, or ...Read more
Not too Risky: The biggest risk would be an allergy to the dye. It is rare, centers knows the cross allergies, that is, red flags about people who are increased risk for an allergic reaction. Centers are also prepared to take appropriate in case there is an allergic reaction. There is also the risk from the radiation associated with the ct. ...Read moreSee 1 more doctor answer
What is the best mri/mra test (model) to rule out brain aneurysm in men and is it done with (gadolinium) contrast?
Is there something they will give me for anxiety when i'm doing the positron emission tomography scan?
Maybe: Taking a pet study is easy and painless. You will get an injection of a radioactive substance (glucose) and relax in a calm quiet area. Then the technologists will have you lay on a motorized table and you slowly are moved through two large open tubes that scan you. You won't feel anything otherwise and can keep your eyes open or closed. A relaxing medicine can be given if absolutely necessary. ...Read more
Approved for cancer: Pet scan are approved for staging, response assessment and surveillance of certain types of cancers. However, any pathologic process that augments the consumption of glucose (such as infection or inflammation) can be evaluated, though these indications are not currently covered. In addition, pet scans are used to evaluate for brain cognitive disorder, heart ischemia and myocardial viability. ...Read moreSee 3 more doctor answers
Several uses: In most cases PET CT scan is used for detecting metatases in the body. It can also be used for brain with mets, primary tumors, and epilepsy. Injection of glucose metabolite F18 FDG goes to malignant lesions that are highly metabolic,. Usually more sensitive for detecting smaller lesions. Used in staging malignancies and following patient's response to chemotherapy and radiation ...Read moreSee 3 more doctor answers
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
Very Common Test: 'helical computed tomography' -- a cat scan -- is an immensely valuable test for evaluating diseases of every part of the body. Scanners are widely available, both in hospitals and in outpatient centers, and the images obtained provide valuable insight into many diseases. ...Read moreSee 1 more doctor answer
When having a pet scan, is the CT scan that used in conjunction good enough to diagnose all tumors?
Good but not all: It is good to have ct in conjunction with pet scan because ct provides more resolution. It helps the radiologist correlate signals seen on pet scan with actual anatomy precisely. However, no test is perfect, so pet/ct is not able to diagnose all tumors. But pet/ct can diagnose many types. ...Read moreSee 2 more doctor answers
Heard pet scan expose equal radiation as ct.What will be the radiation for pet +ct which are using nowadays combined?Is it double the CT radiation?!
Variable: The exact radiation you get from ct and pet/cts varies based on the used protocol. Roughly speaking a diagnostic ct gives you a rad dose of 10-15 msv. Pet/cts are often done with low-dose ct, so instead of 10-15 msv you get 1-2 msv from the ct. For the pet portion is approximately 8-12 msv. So a regular pet/ct is approx 12-14 msv and if you add a diagnostic ct you get 10-15 msv more. ...Read moreSee 2 more doctor answers
What is a pet scan? What is a pet scan and how is it different from other breast imaging procedures?
Anatomy vs Physiolog: Mri and ct look at the structure of the body, the anatomy, and the way diseases change or distort it. Pet looks at the physiology, or how the body uses, or metabolizes something. For pet, the most common metabolism pathway looked at is how glucose is used. Ct is used to correlate anatomy to the pet pet images the whole body, while mri, us and mammography are limited to a portion of the body. ...Read moreSee 2 more doctor answers
In general, NO: A ct scan involves radiation, which is of minimal risk although pregnant women should probably delay nonemergent ct. "dye" or contrast as we call it, is also very low risk, however certain people have "contrast allergies" which can range from hives/itching all the way to catastrophic swelling and blood pressure loss which can lead to death. If you have severe allergies, tell your doctor before. ...Read moreSee 1 more doctor answer
See the brain, skull: While xrays show the bones, a ct is sensitive enough to see the brain and its structures. Ct is vers useful to see blood, abnormal fluid collections, masses, areas of old or subacute stroke. The skull, sinuses, scalp and facial bones, eyes, mouth are also seen. Mri is even more sensitive for visualization of the brain and other soft tissue structures and may be required if the ct is positive. ...Read more
Ct scan dects brain aneurysms? Is it possible for a CT scan without contrast to reveal an unruptured brain aneurysm? Is the test meant to find that sort of thing?
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