4.1 | Spectrum analysis
The results of t -test showed that there was a significant difference between nasal polyps and normal brain tissue in the same side. The analysis of 3.0T1H-MRS can get the biochemical metabolism information of clinical value: Ace(11.43 ± 6.11), NAA (17.76 ± 6.20), Cho (23.19 ± 6.91), Lac (12.51 ± 3.42), Lac / Ace (1.09 ± 0.56); Cho / NAA (1.34 ± 1.10), Lac / NAA (0.70 ± 0.55).The results showed that Ace increased and was the most obvious, Cho increased, lac increased and NAA decreased, Lac / Ace ratio decreased the most obvious, Cho / NAA ratio increased and was more obvious, Lac / NAA ratio increased. This explains. Nasal polyps have their own biochemical characteristics. If we grasp the biochemical characteristics of nasal polyps in clinical practice, we can carry out the differential diagnosis of nasal polyps by doing 3.0T1H-MRS, which lays a good foundation for non-invasive non-pathological diagnosis of nasal polyps. 3.0T1H-MRS has obvious advantages in imaging compared with the conventional low field MR spectrum. It can not only collect the single voxel during imaging, but also collect the multi voxel, and effectively control the accuracy and stability of the spectral baseline. 3.0T1H-MRS can effectively analyze the change characteristics of metabolites from both qualitative and quantitative perspectives, so as to analyze and judge the patient’s condition1-5. MRS uses magnetic resonance phenomenon and chemical shift to define the molecular composition, which is noninvasive and can show the metabolite composition in brain tissue6.