基于BERT-BiLSTM-CRF的SPECT诊断文本病灶提取研究

随着医学成像技术的不断进步,有价值的数据越来越多,但是当前还无法充分利用这些数据,从而会造成资源浪费。基于此,笔者将SPECT诊断报告作为研究对象,将数据进行预处理后传入构建的BERT-BiLSTM-CRF框架,旨在实现诊断报告中病灶的自动提取。实验结果表明,该方法能够有效完成核医学诊断文本的疾病表征自动提取,获得的精确度、召回率和F1-Score分别为92.21、94.14和93.17。

SPECT核素显像诊断小儿美克尔憩室

目的 评价SPECT核素显像诊断小儿美克耳憩室的价值。方法 14例小儿消化道出血患者 ,男 11例 ,女 3例 ,拟诊美克尔憩室行SPECT核素显像 ,14例均经手术、术后病理检查确诊。结果 14例核素显像患者均见腹部出现局限性放射性异常浓聚灶 ,诊断为美克耳憩室 ,与手术、病理检查符合率 10 0 %。结论 SPECT核素显像对小儿美克尔憩室诊断具有较高的敏感性和特异性 。

SPECT/CT融合显像骨转移癌诊断价值分析

目的:对SPECT/CT融合显像骨转移癌诊断价值的分析与探讨。方法:随机选取在笔者所在医院接受诊断的恶性肿瘤患者,采用不同方法进行治疗,对治疗结果进行对比分析。结果:SPECT/CT组的检查灵敏度指标、特异度指标等指标都优于骨显像组,组间差异具有统计学意义(P<0.05)。结论:对疑似骨转移癌患者,优先采用SPECT/CT诊断法,能够显著提高诊断效率。

Diagnostic value of18F-FDG PET in the assessment of myocardial viability in coronary artery disease：A comparative study with99mTc SPECT and echocar-diography

ObjectiveTo investigate the diagnostic value of 18F-fluorodeoxyglucose positron emission tomography （18F-FDG PET） in the as-sessment of myocardial viability in patients with known coronary artery disease （CAD） when compared to99mTc single photon emission computed tomography （SPECT） and echocardiography, with invasive coronary angiography as the gold standard.MethodsThirty patients with diagnosed CAD met the selection criteria, with 10 of them （9 men, mean age 59.5 ± 10.5 years） undergoing all of these imaging proce-dures consisting of SPECT and PET, echocardiography and invasive angiography. Diagnostic sensitivity of these less invasive modalities for detection of myocardial viability was compared to invasive coronary angiography. Inter- and intra-observer agreement was assessed for di-agnostic performance of SPECT and PET.ResultsOf all patients with proven CAD, 50% had triple vessel disease. Diagnostic sensitivity of SPECT, PET and echocardiography was 90%, 100% and 80% at patient-based assessment, respectively. Excellent agreement was achieved between inter-observer and intra-observer agreement of the diagnostic value of SPECT and PET in myocardial viability （k= 0.9）. Conclusion18F-FDG PET has high diagnostic value in the assessment of myocardial viability in patients with known CAD when com-pared to SPECT and echocardiography. Further studies based on a large cohort with incorporation of18F-FDG PET into patient management are warranted.

Role of SPECT/CT in diagnosis of hepatic hemangiomas

AIM: To investigate the role of SPECT/CT in the diagnosis of hepatic hemangiomas whose anatomical positions are not ideal, situated adjacent to the heart, the inferior cava,hepatic vessels or abdominal aorta, etc.METHODS: The hepatic perfusion, blood pool, and fusion imaging were carried out using SPECT/CT in 54 patients,who were suspected for hepatic hemangiomas. When the anatomical positions were not ideal, the diagnosis was difficult by SPECT only. So the information of computed tomography (CT) was applied to help in diagnosing. The results were recorded as hemangiomas or not.RESULTS: Of the 54 patients, 31 patients were diagnosed as suffering from hepatic hemangiomas. The anatomical positions of eight patients' hepatic hemangiomas (25.81%)were not ideal. Among these lesions of the eight patients,three patients' hepatic lesions were located near to the abdominal aorta, one to the heart, and four to the inferior cava. In addition, six abnormal radioactivity accumulation regions, adjacent to the heart and inferior cava, with the help of CT, were confirmed to be the imaging of inferior cava other than hepatic hemangiomas.CONCLUSION: When the anatomical positions of hepatic hemangiomas are not good enough for diagnosis, the fusion imaging of SPECT/CT is a simple and efficient method for differential diagnosis.

^(99m)Tc-热变性红细胞脾显像诊断异位脾种植临床价值

目的探讨99mTc-热变性红细胞脾显像,对脾破裂脾脏切除术后异位脾种植的诊断价值。方法 (1)99mTc标记热变性红细胞(改良方法);(2)Philips Forte双探头SPECT;(3)进行早期和延迟显像;(4)复习国内文献。结果 (1)患者外伤后脾切除、肠穿孔修补术22年。99mTc-热变性红细胞脾显像发现异位脾种植6枚,其中5枚通过增强CT定位,1枚CT平扫定位于子宫表面;(2)复习文献9篇,临床以肿瘤收治61例,手术61例(其中5例穿刺活检,3例腔镜活检),诊断脾异位种植超过68个。结论99mTc-热变性红细胞脾显像特异性诊断异位脾种植可避免不必要手术,保留患者残存防御能力,值得临床推广应用。