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  1. Magnetic resonance imaging - Wikipedia

    en.wikipedia.org/wiki/Magnetic_resonance_imaging

    MRI requires a magnetic field that is both strong and uniform to a few parts per million across the scan volume. The field strength of the magnet is measured in teslas – and while the majority of systems operate at 1.5 T, commercial systems are ...

    • nuclear magnetic resonance imaging (NMRI), magnetic resonance tomography (MRT)
    • 003335
  2. Magnetic resonance imaging of the brain - Wikipedia

    en.wikipedia.org/wiki/MRI_brain_scan

    Magnetic resonance imaging of the brain uses magnetic resonance imaging (MRI) to produce high quality two-dimensional or three-dimensional images of the brain and brainstem without the use of ionizing radiation (X-rays) or radioactive tracers.

  3. Physics of magnetic resonance imaging - Wikipedia

    en.wikipedia.org/wiki/MRI_scanner

    The physics of magnetic resonance imaging (MRI) concerns fundamental physical considerations of MRI techniques and technological aspects of MRI devices. MRI is a medical imaging technique mostly used in radiology and nuclear medicine in order to ...

  4. History of magnetic resonance imaging - Wikipedia

    en.wikipedia.org/wiki/History_of_magnetic_resonance_imaging

    They also performed the first MRI body scan of a human being on July 3, 1977, studies they published in 1977. In 1979, Richard S. Likes filed a patent on k-space U.S. Patent 4,307,343. MRI Scanner Mark One. The first MRI scanner to be built and ...

  5. Functional magnetic resonance imaging - Wikipedia

    en.wikipedia.org/wiki/Functional_magnetic_resonance_imaging

    Functional magnetic resonance imaging or functional MRI (fMRI) measures brain activity by detecting changes associated with blood flow. This technique relies on the fact that cerebral blood flow and neuronal activation are coupled. When an area ...

    • measures brain activity detecting changes due to blood flow.
  6. MRI sequence - Wikipedia

    en.wikipedia.org/wiki/MRI_sequence

    An MRI sequence in magnetic resonance imaging (MRI) is a particular setting of pulse sequences and pulsed field gradients, resulting in a particular image appearance. A multiparametric MRI is a combination of two or more sequences, and/or ...

  7. Diffusion MRI - Wikipedia

    en.wikipedia.org/wiki/Diffusion_MRI

    Diffusion-weighted magnetic resonance imaging (DWI or DW-MRI) is the use of specific MRI sequences as well as software that generates images from the resulting data that uses the diffusion of water molecules to generate contrast in MR ...

  8. CT scan - Wikipedia

    en.wikipedia.org/wiki/X-ray_computed_tomography

    A CT scan, or computed tomography scan, is a medical imaging procedure that uses computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional (tomographic) images (virtual "slices") ...

    • B?2
    • 88.38
    • X-ray computed tomography (X-ray CT), computerized axial tomography scan (CAT scan), computer aided tomography, computed tomography scan
    • D014057
  9. PET-MRI - Wikipedia

    en.wikipedia.org/wiki/Pet/mri

    PET-MRI systems don't offer a direct way to obtain attenuation maps, unlike stand-alone PET or PET-CT systems. Stand alone PET systems' attenuation correction (AC) is based on a transmission scan (mu - map) acquired using a 68 Ge ...

    • used in clinical field of oncology
  10. Breast MRI - Wikipedia

    en.wikipedia.org/wiki/Breast_MRI

    One alternative to mammography, Breast MRI or contrast enhanced magnetic resonance imaging (MRI), has shown substantial progress in the detection of breast cancer Indications Screening for malignancy in women with greater than 20% lifetime risk ...

    • BH3
    • 3-827
    • 多囊腎會這樣嗎?

      ...泡出血、膿瘍、腎結石以或有癌症可能時,才會考慮作電腦斷層攝影(CT scan)檢查;而核磁共振攝影(MRI)對多囊腎病的診斷是否優於 ...