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  2. Relaxation (NMR) - Wikipedia

    en.wikipedia.org/wiki/Relaxation_(NMR)

    Relaxation (NMR) In MRI and NMR spectroscopy, an observable nuclear spin polarization ( magnetization) is created by a homogeneous magnetic field. This field makes the magnetic dipole moments of the sample precess at the resonance ( Larmor) frequency of the nuclei. At thermal equilibrium, nuclear spins precess randomly about the direction of ...

  3. Arterial spin labelling - Wikipedia

    en.wikipedia.org/wiki/Arterial_spin_labelling

    Arterial spin labeling (ASL), also known as arterial spin tagging, is a magnetic resonance imaging technique used to quantify cerebral blood perfusion by labelling blood water as it flows throughout the brain. ASL specifically refers to magnetic labeling of arterial blood below or in the imaging slab, without the need of gadolinium contrast. [1]

  4. Cardiac imaging - Wikipedia

    en.wikipedia.org/wiki/Cardiac_imaging

    Cardiac imaging refers to minimally invasive imaging of the heart using ultrasound, magnetic resonance imaging (MRI), computed tomography (CT), or nuclear medicine (NM) imaging with PET or SPECT. These cardiac techniques are otherwise referred to as echocardiography, Cardiac MRI, Cardiac CT, Cardiac PET and Cardiac SPECT including myocardial ...

  5. Call and response (music) - Wikipedia

    en.wikipedia.org/wiki/Call_and_response_(music)

    Call: " Shave and a Haircut ", Response: "Two bits". ⓘ. In music, call and response is a compositional technique, often a succession of two distinct phrases that works like a conversation in music. One musician offers a phrase, and a second player answers with a direct commentary or response. The phrases can be vocal, instrumental, or both. [1]

  6. Q&A software - Wikipedia

    en.wikipedia.org/wiki/Q&A_software

    Q&A software is online software that attempts to answer questions asked by users (Q&A stands for "question and answer"). Q&A software is frequently integrated by large and specialist corporations and tends to be implemented as a community that allows users in similar fields to discuss questions and provide answers to common and specialist questions.

  7. Blood-oxygen-level-dependent imaging - Wikipedia

    en.wikipedia.org/wiki/Blood-oxygen-level...

    Blood-oxygen-level-dependent imaging. Blood-oxygen-level-dependent imaging, or BOLD-contrast imaging, is a method used in functional magnetic resonance imaging (fMRI) to observe different areas of the brain or other organs, which are found to be active at any given time. [1]

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