Assessing the image quality of brain magnetic resonance images taken with 1.5T and 3T scanners

Abstract

Magnetic resonance imaging (MRI) is the ideal modality for brain imaging, as high quality anatomical detail is provided while having a higher sensitivity and specificity over other imaging modalities such as Computed Tomography (CT) (Isalm & Munir, 2019; Khan et al., 2019). MRI does not make use of ionising radiation, but acquires images in multiple planes without repositioning the patient through the generation of powerful electromagnetic fields, and radiofrequency pulses. Depending on the gradient and the number of radiofrequency pulses set, different MRI sequences are created. An MRI sequence is a series of radio-frequency pulses used to obtain a signal from the patient to produce an image of the examined area with a particular appearance (weighting) (Liang et al., 2021). [Excerpt]