2.2 | Inspection method
In this study, SE (539 / 12ms) and FSE (4020 / 90ms) [4] were used
to obtain T1 or T2 weighted and MR enhanced images. Based on the
enhanced MRI images, the 3.0T1H-MRS measurement area
was located, and the region of interest was selected for the enhanced
nodule and the ipsilateral normal frontal brain tissue, the size of
which was 2.0 × 2.0 × 2.0 cm3. Contrast medium: 15 ml,
0.1 mmol / kg Gd-DTPA, high pressure syringe, injection speed of 3 ml /
s were used. 3.0T1H-MRS was detected by single voxel
hydrogen proton spectrum detection technology. The fixed-point
resolution spectrum sequence was used to compare the nasal mucosa polyp
area and the normal brain tissue in the forehead. The shimming, water
suppression and signal acquisition were automatically completed; the
phase correction, baseline correction and measurement were used as the
post-processing part, and the real part of the spectrum was taken for
analysis. This paper mainly studies the integral values of the wave
peaks of acetic acid (Ace), lactic acid (Lac), n-acetylaspartic acid
(NAA), choline (Cho), creatine (Cr), and the ratio of the integral
values: Cho / NAA, Cr / Lac, Cr / NAA, Cho / Cr, Lac / NAA and Lac /
Ace.