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What Isotope Is Used In The Injection For A Pet Scan
Fluorine 18: F18.Get a more detailed answer ›
Pet scans most often use a radioactive form of glucose, the energy source for most of the cells in our bodies. The pet scanner can detect and measure how much of the radioactive glucose analog, f-18 fdg, is in a particular organ or region. The areas using more glucose are hyper metabolic and generally more worrisome. Our brains and sometimes hearts prefer glucose as food, making ...Read more
F18-FDG: Different pet tracers exist for positron emitting scans (pet) scans. The most widely used for oncologic purpose is f18-fdg (fluorine-18-fludeoxyglucose) which is a modified glucose (fdg) attached to a radionuclide (f18) that emits gamma photons of 511 kev (energy) and has a physical half-life of 110 minutes. ...Read moreSee 3 more doctor answers
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
Fast brain study: Cat scanning is used often to check for acute brain problems such as tumors, bleeding, skull fractures, sinus infections, looking for larger obvious pathology to make a rapid determination of the need for immediate intervention, and provides better views of bone and sinuses than MRI (which is better to see strokes or ms lesions). ...Read more
Physics: The physical phenomena on which these imaging techniques are built are very different, each is best suited for different purposes. Cat scans are sophisticated x ray, they rely on the degree of absorption of gamma rays (bones, ca, other metals will contrast most). Mri is better for softer tissue imaging because it depends more on the behavior of hydrogen atoms and h2o in the strong magnetic field. ...Read more
For a bone scan what is the purpose of doing some scans before/during the injection of the tracer? I thought that the scans were after it was absorbed
Easy imaging...: It sounds like you are referring to a three phase bone scan (flow, blood pool, and delayed images). Early images can provide more information depending on what your condition is. Early images are helpful to look for osteomyelitis, RSD, and some other conditions and can help determine if a condition is acute or chronic. ...Read more
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
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
No: Gallium scanning involves greater irradiation and is non specific for tumor, infection , and bone abnormalities. Low radiation bone scan is specifically for osseous problems such as fractures, metastatic disease to bone, avascular necrosis, some metabolic bone issues, etc.Patient with unknown source of fever or pain and multifocal disease usually helped by bone scan. ...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
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 in diagnostics between mri, cat scan and colonoscopy? Which one is best for identifying problems?
Big differences: Each of the tests you mentioned (mri, ct, colonoscopy) are used to diagnose different things. Therefore, depending on the problem you are trying to figure out, one test will be better than another. For example, colonoscopy is great for picking up colon polyps, but a regular ct would probably miss them. However, a ct would be great for appendicitis, and a colonoscopy would not be. ...Read more
What is the radiation dose of a CBCT scan (taken for root canal) and what is it equivalent to in natural radiation?
Here's some info...: http://www.dent.umich.edu/patients/cbct-imaging-service-frequently-asked-questions I'm sure there's plenty more out there. Regarding natural radiation, you are comparing full body exposure to exposure of just the jaw, so it is hard to compare. ...Read moreSee 1 more doctor answer
They give U choice?: May learn more from this link: https://www.insideradiology.com.au/gadolinium-contrast-medium/ ...Read more
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