Due to its unrivalled diagnostic and prognostic capabilities, as well as the absence of harmful effects from ionizing radiation, MRI is often the radiological method of choice in children. However, radiology units have to face the inability to produce motion-free images especially in young children, even more so in those affected by neurological or neuropsychiatric disorders. These children are often incapable of completely following verbal instructions and cannot remain still in the scanner for a full exam. To avoid uncontrolled motion and the anxiety derived from long examinations, the majority of young children are sedated. However, sedation represents an extra procedure, carrying its own possible adverse effects, procedural complications as well as additional costs. Producing diagnostic, artefact-free images in a short time in children without sedation is thus an unmet need. The investigators' first hypothesis is that MR Fingerprinting can be used in a number of cases to perform a fast and diagnostic exam in children without using sedation.
The advantages of a fast, motion-resistant quantitative scan are not limited to paediatrics but could see wide application.
Disorders of movement such as tremor-dominant Parkinson's disease and severe cognitive impairments such as Alzheimer's disease represent a big challenge when referred to MRI. Although MRI is not a major player in diagnosing such diseases, these patients often require an exam in order to exclude other pathologies with similar clinical manifestations and to diagnose or follow-up other concomitant conditions. Patients with expansive intracranial lesions or requiring frequent follow-up, like those affected by inflammatory disease of the central nervous system, need to undergo long and demanding procedures, and they can eventually get into significant distress. The image quality of standard MRI with these challenging patient groups is often poor, as they cannot lay still or are unable to follow instructions. The investigators' second hypothesis is that MRF can be used to increase diagnosis rates of exams in difficult adult populations, reducing the time spent in the scanner and thus reducing wasted procedures and cost, and increasing patient comfort.
