뇌 자기공명영상에서 Heavily T2 FLAIR와 DWI 기법의 영상비교
Image Comparison of Heavily T2 FLAIR and DWI Method in Brain Magnetic Resonance Image
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초록
The purpose of this study is to obtain brain MRI images through Heavenly T2 FLAIR and DWItechniques to find out strengths and weaknesses of each image. Data were analyzed on 13 normal peopleand 17 brain tumor patients. Philips Ingenia 3.0TCX was used as the equipment used for the inspection,and 32 Channel Head Coil was used to acquire data. Using Image J and Infinity PACS Data, 3 mm2 of graymatter, white matter, cerebellum, basal ganglia, and tumor areas were set and measured. Quantitativeanalysis measured SNR and CNR as an analysis method, and qualitative analysis evaluated overallimage quality, lesion conspicuity, image distortion, susceptibility artifact and ghost artifact on a 5-pointscale. The statistical significance of data analysis was that Wilcox-on Signed Rank Test and Paired t-testwere executed, and the statistical program used was SPSS ver.22.0 and the p value was less than 0.05. In quantitative analysis, the SNR of gray matter, white matter, cerebellum, basal ganglia, and tumorof Heavily T2 FLAIR is 41.45±0.13, 40.52±0.45, 41.44±0.51, 40.96±0.09, 35.28±0.46 and the CNR is15.24±0.13, 16.75±0.23, 16.28±0.41, 15.83±0.17, 16.63±0.51. In DWI, SNR is 32.58±0.22, 36.75±0.17,30.21±0.19, 35.83±0.11, 43.29±0.08, and CNR is 13.14±0.63, 14.21±0.31, 12.95±0.32, 11.73±0.09,17.56±0.52. In normal tissues, Heavenly T2 FLAIR obtained high results, but in disease evaluation, highresults were obtained at DWI, b=1000 (p<0.05). In addition, in the qualitative analysis, overall imagequality, lesion conspicuity, image distortion, susceptibility artifact and ghost artifact aspects of theHeavily T2 FLAIR were evaluated, and 3.75±0.28, 2.29±0.24, 3.86±0.23, 4.08±0.21, 3.79±0.22 valueswere found, respectively, and 2.53±0.39, 4.13±0.29, 1.90±0.20, 1.81±0.21, 1.52±0.45 in DWI. As a resultof qualitative analysis, overall image quality, image distortion, susceptibility artifact and ghost artifact wererated higher than DWI. However, DWI was evaluated higher in lesion conspicuity (p<0.05). In normaltissues, the level of Heavenly T2 FLAIR was higher, but the DWI technique was higher in the evaluation ofthe disease (tumor). The two results were necessary techniques depending on the normal site and thelocation of the disease. In conclusion, statistically significant results were obtained from the two techniques. In quantitative and qualitative analysis, the two techniques had advantages and disadvantages, andin normal and disease evaluation, the two techniques produced useful results. These results are believedto be educational data for clinical basic evaluation and MRI in the future.
Abstract
The purpose of this study is to obtain brain MRI images through Heavenly T2 FLAIR and DWItechniques to find out strengths and weaknesses of each image. Data were analyzed on 13 normal peopleand 17 brain tumor patients. Philips Ingenia 3.0TCX was used as the equipment used for the inspection,and 32 Channel Head Coil was used to acquire data. Using Image J and Infinity PACS Data, 3 mm2 of graymatter, white matter, cerebellum, basal ganglia, and tumor areas were set and measured. Quantitativeanalysis measured SNR and CNR as an analysis method, and qualitative analysis evaluated overallimage quality, lesion conspicuity, image distortion, susceptibility artifact and ghost artifact on a 5-pointscale. The statistical significance of data analysis was that Wilcox-on Signed Rank Test and Paired t-testwere executed, and the statistical program used was SPSS ver.22.0 and the p value was less than 0.05. In quantitative analysis, the SNR of gray matter, white matter, cerebellum, basal ganglia, and tumorof Heavily T2 FLAIR is 41.45±0.13, 40.52±0.45, 41.44±0.51, 40.96±0.09, 35.28±0.46 and the CNR is15.24±0.13, 16.75±0.23, 16.28±0.41, 15.83±0.17, 16.63±0.51. In DWI, SNR is 32.58±0.22, 36.75±0.17,30.21±0.19, 35.83±0.11, 43.29±0.08, and CNR is 13.14±0.63, 14.21±0.31, 12.95±0.32, 11.73±0.09,17.56±0.52. In normal tissues, Heavenly T2 FLAIR obtained high results, but in disease evaluation, highresults were obtained at DWI, b=1000 (p<0.05). In addition, in the qualitative analysis, overall imagequality, lesion conspicuity, image distortion, susceptibility artifact and ghost artifact aspects of theHeavily T2 FLAIR were evaluated, and 3.75±0.28, 2.29±0.24, 3.86±0.23, 4.08±0.21, 3.79±0.22 valueswere found, respectively, and 2.53±0.39, 4.13±0.29, 1.90±0.20, 1.81±0.21, 1.52±0.45 in DWI. As a resultof qualitative analysis, overall image quality, image distortion, susceptibility artifact and ghost artifact wererated higher than DWI. However, DWI was evaluated higher in lesion conspicuity (p<0.05). In normaltissues, the level of Heavenly T2 FLAIR was higher, but the DWI technique was higher in the evaluation ofthe disease (tumor). The two results were necessary techniques depending on the normal site and thelocation of the disease. In conclusion, statistically significant results were obtained from the two techniques. In quantitative and qualitative analysis, the two techniques had advantages and disadvantages, andin normal and disease evaluation, the two techniques produced useful results. These results are believedto be educational data for clinical basic evaluation and MRI in the future.
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