人工智能辅助压缩感知技术结合三种T2WI压脂技术的应用研究  

Application of artificial intelligence-assisted compressed sensing combined with three types of fat-suppressed T2WI techniques

作　　者：李刚[1] 黄锦彬 汪昕荣 雷漫诗 熊安妮 向青 邓锶锶 孟占鳌 Li Gang;Huang Jinbin;Wang Xinrong;Lei Manshi;Xiong Anni;Xiang Qing;Deng Sisi;Meng Zhan’ao(Department of Radiology,the Third Affiliated Hospital of Sun Yat-sen University,Guangzhou 510630,China)

机构地区：[1]中山大学附属第三医院放射科,广州510630

出　　处：《新医学》2023年第10期717-722,共6页Journal of New Medicine

基　　金：广州市科技计划项目(202007030007)。

摘　　要：目的探讨人工智能辅助压缩感知技术(ACS)结合3种T2加权像(T2WI)压脂技术在图像质量、成像时间及方案选择方面的优势。方法对因腰痛行常规腰椎MRI平扫的30例患者,除了进行原有的检查序列外,再结合ACS加行5组矢状位(SAG)T2WI压脂序列,使用的3种T2WI压脂技术包括频率选择饱和法(FS)、水脂分离成像技术(WFI)及短反转时间的反转恢复技术(STIR),共包括ACS-SAG-T2WI-FS(A组,30例)、ACS-SAG-T2WIWFI(B组,30例)、ACS-SAG-STIR(C组,30例)、SAG-T2WI-FS(D组,30例)、SAG-T2WI-WFI(E组,30例)、SAG-STIR(F组,30例)6组序列。通过客观评价指标信噪比(SNR)、对比噪声比(CNR)等,以及脊柱疾病诊断经验丰富的2名放射科医师对图像质量的主观评价评估检查效果。结果A组第4椎体、第4~5椎间盘、同层脊髓的SNR、CNR大于D组;B组第4椎体、第4~5椎间盘、同层脊髓的SNR、CNR大于E组;C组第4椎体、第4~5椎间盘、同层脊髓的SNR、CNR大于F组(P均<0.01)。从成像时间看,A组比D组节省13.2%的时间,B组比E组节省8.9%的时间,C组比F组节省12.4%的时间(P均<0.01)。2名放射科医师对A、B、C组的主观评价均高于D、E、F组(P均<0.01;2名医师评分具有一致性,Kappa=0.972、P<0.01)。结论ACS结合3种T2WI压脂技术在时间、质量上均优于单纯使用3种T2WI压脂技术。其中ACS-SAG-T2WI-FS成像时间最短,图像质量最好,为首选方法;ACS-SAG-T2WI-WFI能提供多期图像,时间优势差为次选;ACS-SAG-STIR有最稳定的压脂能力,可作为最后的选择。Objective To explore the advantages of artifi cial intelligence-assisted compressed sensing(ACS)combined with three types of fat-suppressed T2WI techniques in image quality,scanning time and scheme selection.Methods In 30 patients with low back pain who underwent conventional lumbar magnetic resonance imaging(MRI)plain scan,ACS combined with 5 groups of sagittal(SAG)fat-suppressed T2WI sequences were added to original examination sequence.Frequency-selective fat saturation(FS),water-fat separation(WFI)and short tau inversion recovery(STIR)techniques were employed.ACS-SAG-T2WI-FS(group A,n=30),Acs-SAG-T2WI-WFI(group B,n=30),ACS-SAG-STIR(group C n=30),SAG-T2WI-FS(group D,n=30),SAG-T2WI-WFI(group E,n=30)and SAG-STIR sequences(group F,n=30)were employed.Objective evaluation indicators of signal-to-noise ratio(SNR)and contrast-to-noise ratio(CNR)and subjective evaluation by two radiologists were carried out to assess the effect.Results The SNR and CNR of the fourth vertebra,the fourth and fi fth intervertebral discs and the same spinal cord in group A were higher than those in group D.The SNR and CNR of the fourth vertebra,the fourth and fi fth intervertebral discs,and the same spinal cord in group B were higher than those in group E.The SNR and CNR of the fourth vertebra,the fourth and fi fth intervertebral discs,and the same spinal cord in group C were higher compared with those in group F(all P<0.01).The imaging time in group A was shortened by 13.2%compared with that in group D.The imaging time in group B was reduced by 8.9%compared with that in group E.The imaging time in group C was reduced by 12.4%compared with that in group F(all P<0.01).The subjective scores by two radiologists for groups A,B and C were signifi cantly higher than those in groups D,E and F(all P<0.01;The scores of the two physicians were consistent,Kappa=0.972,P<0.01).Conclusions The combination of ACS and three types of fat-suppressed T2WI techniques(FS,WFI and STIR)is superior to use of fat-suppressed T2WI techniques alone.ACS-SAG-T2WI-FS se

关 键 词：人工智能辅助压缩感知技术 水脂分离成像技术 频率选择饱和法 短反转时间 

分 类 号：R319[医药卫生—基础医学] TP18[自动化与计算机技术—控制理论与控制工程]