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  2. Positron emission tomography - Wikipedia

    en.wikipedia.org/wiki/Positron_emission_tomography

    Positron emission tomography (PET) [1] is a functional imaging technique that uses radioactive substances known as radiotracers to visualize and measure changes in metabolic processes, and in other physiological activities including blood flow, regional chemical composition, and absorption.

  3. Brain positron emission tomography - Wikipedia

    en.wikipedia.org/wiki/Brain_positron_emission...

    PET scanning is also used for diagnosis of brain disease, most notably because brain tumors, strokes, and neurondegenerative diseases (such as Alzheimer's disease and Parkinson's disease) all cause great changes in brain metabolism, which in turn causes detectable changes in PET scans. PET is probably most useful in early cases of certain ...

  4. False positives and false negatives - Wikipedia

    en.wikipedia.org/wiki/False_positives_and_false...

    The false positive rate (FPR) is the proportion of all negatives that still yield positive test outcomes, i.e., the conditional probability of a positive test result given an event that was not present. The false positive rate is equal to the significance level. The specificity of the test is equal to 1 minus the false positive rate.

  5. PET-CT - Wikipedia

    en.wikipedia.org/wiki/PET-CT

    Positron emission tomography–computed tomography (better known as PET-CT or PET/CT) is a nuclear medicine technique which combines, in a single gantry, a positron emission tomography (PET) scanner and an x-ray computed tomography (CT) scanner, to acquire sequential images from both devices in the same session, which are combined into a single superposed (co-registered) image.

  6. US removes coverage curb on PET scans for Alzheimer's ... - AOL

    www.aol.com/news/u-agency-removes-coverage-curb...

    U.S. health officials on Friday lifted curbs on reimbursement of a non-invasive imaging test called amyloid PET used to diagnose Alzheimer's, ending a once-per-lifetime limitation that clears the ...

  7. Incidental imaging finding - Wikipedia

    en.wikipedia.org/wiki/Incidental_imaging_finding

    Imaging at 6, 12, and 24 months and repeat hormonal evaluation yearly for 4 years is often recommended, [6] but there exists controversy about harm/benefit of such screening as there is a high subsequent false-positive rate (about 50:1) and overall low incidence of adrenal carcinoma. [8]

  8. RHOBH's Teddi Mellencamp Gives Post-Surgery Update, Had ...

    www.aol.com/entertainment/teddi-mellencamp-skin...

    Mellencamp shared the results of her PET scan via Instagram, including snaps of where her melanomas were removed. “They think I’m predisposed to melanomas,” she noted. “I will need wide ...

  9. Likelihood ratios in diagnostic testing - Wikipedia

    en.wikipedia.org/wiki/Likelihood_ratios_in...

    Here "T+" or "T−" denote that the result of the test is positive or negative, respectively. Likewise, "D+" or "D−" denote that the disease is present or absent, respectively. So "true positives" are those that test positive (T+) and have the disease (D+), and "false positives" are those that test positive (T+) but do not have the disease (D ...

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