Magnetic resonance imaging device and dementia monitoring system

A dementia detecting system, comprising:

• a plurality of magnetic resonance imaging devices, wherein each of the plurality of magnetic resonance imaging devices comprises:
• a carrying unit;
• an imaging unit;
• and
• a controlling computer;
• a cloud server connected to the plurality of magnetic resonance imaging devices, wherein the cloud server comprises:
• a controlling module;
• a data processing module;
• an image reconstructing module, the image reconstructing module form cross-sectional scanned images of an user's brain memory showing microstructure;
• an image storing module;
• and
• an image comparing module, wherein the image comparing module is configured to analyze and compare size changes of the cross-sectional scanned images of the user's brain memory showing microstructure along a single direction or several different directions captured at different times, and the cloud server sends different suggestions, corresponding to different judgement results of the image comparing module, to a mobile electronic device;
• H1 is defined as a first changes threshold, H2 is defined as a second changes threshold, and H1<H2, the first changes threshold H1 and the second changes threshold H2 are reduction rate, a size Ln of the cross-sectional scanned image captured in the nth time is compared with a size L1 of the cross-sectional scanned image captured in the first time, and “n” is an integer greater than 1, the judgement results comprises at least three changes levels, namely:
• the changes of the cross-sectional scanned images captured at different times is less than the first changes threshold H1, and (L1−Ln)/Ln<2%;
• the cross-sectional scanned images of the user's brain memory showing microstructure captured at different times have no changes;
• the changes of the cross-sectional scanned images captured at different times is greater than or equal to the first changes threshold H1 and less than or equal to the second changes threshold H2, and 2%<(L1−Ln)/Ln<5%;
• the cross-sectional scanned images of the user's brain memory showing microstructure captured at different times have slight changes;
• and
• the changes of the cross-sectional scanned images captured at different times is greater than the second changes threshold H2, and 5%<(L1−Ln)/Ln;
• the cross-sectional scanned images of the user's brain memory showing microstructure captured at different times have changes.