不同强度AIFI重建技术在上腹部MRI检查中的应用

Application value of artificial intelligence-based filtering and interpolated image reconstruction technology with different strengths in upper abdominal magnetic resonance imaging examination of patients

目的研究不同强度基于人工智能的滤波和插值图像(AIFI)重建技术在上腹部磁共振成像(MRI)检查中的应用价值。方法回顾性分析2019年5月至2020年5月西安高新医院收治的66例上腹部MRI检查患者的临床资料,将资料处理后按照不同处理方法分为常规滤波重建组(n=22)、AIFI重建组(n=22)及AIFI和滤波同时重建组(n=22),观察并比较三组患者的图像锐利度和图像峰值信噪比以及图像对比度、图像噪声、图像质量、图像清晰度评分。结果常规滤波重建组、AIFI重建组(强度1、2、3、4、5)以及AIFI和滤波同时重建组(AIFI强度2联合中等强度滤波及AIFI强度3联合中等强度滤波)图像锐利度与原始图像比较具有一定优势,其中AIFI重建组AIFI强度4、AIFI和滤波同时重建组AIFI强度3联合中等强度滤波图像锐利度分别为(0.45±0.10)dB、(0.52±0.16)dB,均明显高于常规滤波重建组的(0.29±0.05)dB,且AIFI和滤波同时重建组AIFI强度3联合中等强度滤波图像锐利度为(0.52±0.16)dB,明显高于AIFI重建组强度1、2、3、4、5的(0.32±0.07)dB、(0.35±0.08)dB、(0.37±0.09)dB、(0.45±0.10)dB、(0.40±0.11)dB,差异均有统计学意义(P<0.05);常规滤波重建组、AIFI重建组(强度1、2、3、4、5)以及AIFI和滤波同时重建组(AIFI强度2联合中等强度滤波及AIFI强度3联合中等强度滤波)图像对比度、图像噪声、图像质量、图像清晰度均显著优于原始图像,且AIFI重建组强度3、AIFI和滤波同时重建组AIFI强度2和AIFI强度3的图像对比度评分分别为(3.95±0.18)分、(4.11±0.21)分、(4.13±0.22)分,均明显高于常规滤波重建组的(3.37±0.12)分,AIFI重建组强度4、AIFI和滤波同时重建组AIFI强度2和AIFI强度3联合的图像噪声评分分别为(3.99±0.18)分、(4.01±0.20)分、(4.02±0.21)分,明显高于常规滤波重建组的(3.89±0.12)分,AIFI和滤波同时重建组AIFI强度2和AIFI强度3的图像质量评分分别为(4.08±0.21)分、(4.14±0.22)分,明显高于常规滤波重建组的(3.48±0.14)分,AIFI重建组强度4的图像清晰度评分为(3.99±0.19)分,明显高于常规滤波重建组的(3.38±0.13)分,差异均有统计学意义(P<0.05)。结论中高强度AIFI重建技术的降噪表现与常规滤波比较表现更优,是一种前景良好的降噪技术,其在腹部MRI中的最优参数T1加权成像(T1WI)为AIFI强度3与常规滤波组合,双回波序列和T2加权成像(T2WI)为AIFI强度4。

Objective To study the application value of artificial intelligence-based filtering and interpolated image(AIFI)reconstruction technology with different intensities in upper abdominal magnetic resonance imaging(MRI)examination.Methods The clinical data of 66 patients undergoing upper abdominal MRI examinations admitted to Xi'an High-tech Hospital from May 2019 to May 2020 were retrospectively analyzed.After processing the data,they were divided into conventional filtering reconstruction group(n=22),AIFI reconstruction group(n=22),and AIFI and fil-tering simultaneous reconstruction group(n=22)according to different processing methods.The image sharpness and peak signal noise of the three groups of patients,the ratio and image contrast,image noise,image quality,and image sharpness scores were observed and compared.Results The image sharpness in conventional filtering reconstruction group,AIFI reconstruction group(intensity 1,2,3,4,5),and AIFI and filtering simultaneous reconstruction group(AIFI intensity 2 combined with medium intensity filtering,AIFI intensity 3 combined with medium intensity filtering)has cer-tain advantages in comparison with original image;the image sharpness in AIFI reconstruction group(intensity 4),AIFI and filtering simultaneous reconstruction group(AIFI intensity 3 combined with medium intensity filtering)were(0.45±0.10)dB and(0.52±0.16)dB,which are significantly higher than(0.29±0.05)dB of the conventional filtering reconstruc-tion group;and the image sharpness in AIFI and filtering simultaneous reconstruction group(AIFI intensity 3 combined with medium intensity filtering)was(0.52±0.16)dB,significantly higher than(0.32±0.07)dB,(0.35±0.08)dB,(0.37±0.09)dB,(0.45±0.10)dB,(0.40±0.11)dB of AIFI reconstruction group(intensity 1,2,3,4,5);the differences were sta-tistically significant(P<0.05).In conventional filtering reconstruction group,AIFI reconstruction group(intensity 1,2,3,4,5),and AIFI and filter simultaneous reconstruction group(AIFI intensity 2 combined with medium intensity filtering,AIFI intensity 3 combined with medium intensity filtering),the image contrast,image noise,image quality,and image clarity were significantly higher than those of the original image;the image contrast scores of AIFI reconstruction group(intensity 3),AIFI and filtering simultaneous reconstruction group(AIFI intensity 2 combined with medium intensity filter-ing),and AIFI and filtering simultaneous reconstruction group(AIFI intensity 3 combined with medium intensity filtering)were(3.95±0.18)points,(4.11±0.21)points,(4.13±0.22)points,which were significantly better than(3.37±0.12)points of the conventional filtering reconstruction group;the image noise scores in AIFI reconstruction group(intensity 4),AIFI and filtering simultaneous reconstruction group(AIFI intensity 2 combined with medium intensity filtering),AIFI and filter-ing simultaneous reconstruction group(AIFI intensity 3 combined with medium intensity filtering)were(3.99±0.18)points,(4.01±0.20)points,(4.02±0.21)points,which were significantly higher than(3.89±0.12)points of the conventional filter-ing reconstruction group;the image quality scores of AIFI and filtering simultaneous reconstruction group(AIFI intensi-ty 2 combined with medium intensity filtering),AIFI and filtering simultaneous reconstruction group(AIFI intensity 3 combined with medium intensity filtering)were(4.08±0.21)points,(4.14±0.22)points,which were significantly higher than(3.48±0.14)points of the conventional filtering reconstruction group;the image clarity score of AIFI reconstruction group(intensity 4)was(3.99±0.19)points,significantly higher than(3.38±0.13)points of conventional filtering recon-struction group;the differences were statistically significant(P<0.05).Conclusion Medium and high intensity AIFI re-construction technology has better noise reduction performance than conventional filtering reconstruction,which is a promising noise reduction technology.The optimal parameter T1 weighted imaging(T1WI)in abdominal MRI is the combination of AIFI intensity 3 and conventional filtering,and the dual echo sequence and T2 weighted imaging(T2WI)are AIFI intensity 4.