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The value of diffusion-weighted imaging in the diagnosis of active sacroiliitis

机译：弥散加权成像在活动性sa关节炎诊断中的价值

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The value of diffusion-weighted imaging in the diagnosis of active sacroiliitis Hüseyin Akdeniz sup1/sup, Serhat Avcusup2/sup, ?zkan ünalsup3/sup, Ayd?n Borasup4/sup, Mustafa Kas?m Karahocagilsup5/sup sup1/supDepartment of Radiology, Van Yuzuncu Yil University, Dursun Odaba?? Medical Center, Van, Turkey sup2/supDepartment of Radiology, Gazi University, Faculty of Medicine, Ankara, Turkey sup3/supDepartment of Radiology, Ankara Oncology Education and Research Hospital, Ankara, Turkey sup4/supDepartment of Radiology, Private Ba?ar? Hospital, Istanbul, Turkey sup5/supDepartment of Infectious Diseases and Clinical Microbiology, Ahi Evran University, School of Medicine, K?r?ehir, Turkey INTRODUCTION: The aim of this study was to evaluate the effectiveness of diffusion-weighted imaging (DWI) in the diagnosis of active sacroiliitis. METHODS: In this prospective study, 66 patients with clinical prediagnosis of active sacroiliitis were evaluated. Four patients who were not suitable for MRI examination were excluded. Twenty subjects with no complaint of low back pain constituted the control group. All of the patients underwent sacroiliac MRI examination performed with a 1.5 Tesla unit using phase array body coil. Before DWI, oblique axial and coronal T1 and T2-weighted TSE followed by STIR sequences were obtained. DWI examinations were obtained on SS-SE EPI sequence through chemical shifting selective fat supression technique. ?b? value was chosen as 50, 400 and 800 mm2/sec and total scanning time was 114 seconds. ADC calculations were made from the ADC maps by placing ROI on the active inflammatory regions in case group and on sacrum and iliac bones in control group. RESULTS: Of the 62 cases, 42 had a radiologic diagnosis of active sacroiliitis, and 20 were regarded as normal. Mean ADC values in 42 patients with active sacroiliitis were significantly higher than control group. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy rate of DWI in the diagnosis of active sacroiliitis were found to be 100 % for all. The cut-off ADC value was 0.94x10-3 mm2/sec for right sacroiliitis and 0.89x10-3 mm2/sec for left sacroiliitis. DISCUSSION AND CONCLUSION: We believe that DWI and ADC quantification can be used successfully for the early diagnosis and follow-up of active sacroiliitis.
机译：弥散加权成像在活动性cro关节炎HüseyinAkdeniz 1 ，Serhat Avcu 2 、? kankanal 3 ，Ayd？n诊断中的价值Bora 4 ，Mustafa Kas？m Karahocagil 5 1 范·尤尊库伊尔大学放射学系，杜尔松·奥达巴？土耳其范市医学中心 2 土耳其安卡拉加兹大学医学院放射学系 3 土耳其安卡拉安卡拉肿瘤教育与研究医院放射科 4 私人医院放射科？土耳其伊斯坦布尔市医院 5 阿伊埃夫兰大学医学院传染病学与临床微生物学系，土耳其克勒希尔（K？r？hir）简介：本研究的目的是评估扩散的有效性加权成像（DWI）诊断活动性sa肌炎。方法：在这项前瞻性研究中，对66例活动性cro关节炎的临床预诊断患者进行了评估。排除了四名不适合进行MRI检查的患者。二十名无腰痛主诉的受试者组成对照组。所有患者均通过相阵列人体线圈以1.5特斯拉单位进行saMRI检查。在进行DWI之前，先获得倾斜的轴向和冠状T1和T2加权TSE，然后是STIR序列。通过化学位移选择性脂肪抑制技术对SS-SE EPI序列进行DWI检查。 b值选择为50、400和800 mm2 / sec，总扫描时间为114秒。通过将ROI放置在病例组的活动性炎症区域以及对照组的骨和骨上，根据ADC图进行ADC计算。结果：在62例中，有42例经放射学诊断为活动性cro肌炎，其中20例视为正常。 42例活动性cro关节炎患者的平均ADC值明显高于对照组。发现DWI对活动性cro菌炎的敏感性，特异性，阳性预测值，阴性预测值和准确率均为100％。右sa肌的截止ADC值为0.94x10-3 mm2 / sec，左sa肌为0.89x10-3 mm2 / sec。讨论与结论：我们认为DWI和ADC定量可成功用于活动性cro关节炎的早期诊断和随访。

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