Factors affecting image quality in MRI

David, Leena R Factors affecting image quality in MRI. In: A CME on advanced imaging technology 2013 – Guest Speaker, Sep 2013, Mangalore. (Submitted)

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Image of a body can be created from most abundantly available hydrogen atoms in the body. These hydrogen atoms or protons are randomly arranged. When we place the patient inside the magnet, these hydrogen protons acts as tiny magnet and they align themselves in parallel or antiparallel direction. Then the RF pulse will be send which makes the protons precess in phase and it also establishes a new transverse, magnetization. When it stops the protons move back to its original position and releases the energy. A receiver coil measures the energy released by this disturbed proton and this energy information will be computer processed or reconstructed to form an image on a TV monitor. To get an MR image which best suits the particular clinical indication we use an ordered combination of RF and gradient pulses. It is called as a Pulse Sequence. So the technologists should be well aware of the factor which affects the image quality in MR such as SNR, CNR, Spatial resolution and Scan time.

Item Type: Conference or Workshop Item (Paper)
Subjects: Allied Health > MCOAHS Manipal > Medical Imaging Tech
Depositing User: KMC Manipal
Date Deposited: 16 Dec 2013 04:23
Last Modified: 16 Dec 2013 04:23
URI: http://eprints.manipal.edu/id/eprint/137985

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