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Objective To understand the research hotspots and research trends about convolutional neural networks in the field of oncology imaging diagnosis by analyzing the characteristics of published literature at home and abroad over the past decade. Methods The SCI-E database was used as the data source to retrieve literature about convolutional neural networks in the field of oncology imaging diagnosis published from 2012 to 2022. The distribution characteristics of countries, institutions, journals, co-cited authors, and keywords of the studies were analyzed by CiteSpace software. Results A total of 1088 papers were eventually included, and they were mostly from China, the United States, and India. A total of 39 papers were published by Sun Yat-sen University, the research institution with the highest number of publications. Radiology Nuclear Medicine Medical Imaging was the journal with the highest number of publications. A total of 25 high-frequency keywords and 15 burst keywords were obtained. The formation of 12 author co-citation clusters such as image segmentation and lung nodule, as well as 11 keyword clusters such as automatic segmentation and breast cancer, was observed. Conclusion Current research on convolutional neural networks for oncology imaging diagnosis focuses on oncology segmentation, lung-nodule recognition, assisted diagnosis of breast cancer, and other high-frequency oncology.
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Objective To explore the hemodynamic characteristics in functional side-to-end (STE) anastomosis arteriovenous fistula (AVF) by computational fluid dynamics (CFD), so as to provide theoretical basis for clinical application of the AVF. Methods AVF models of functional STE anastomosis (STE group) and conventional STE anastomosis (cSTE group) were established. The hemodynamic parameters of models in two groups under retrograde and antegrade flow states were analyzed, including blood flow velocity, pressure drop, low wall shear stress area (LWSSA). Results Under retrograde flow, the total LWSSA in STE group was 5.70% lower than that in cSTE group, and the LWSSA on venous wall in STE group was 49.71% lower than that in cSTE group. Under antegrade flow, the total LWSSA in STE group was 6.97% greater than that in cSTE group, and the LWSSA on venous wall in STE group was 10.62% lower than that in cSTE group. Conclusions Under retrograde flow state, functional STE anastomosis can significantly decrease the LWSSA of AVF, while under antegrade flwo state, functional STE anastomosis has no significant impact on improving the LWSSA of AVF.
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Objective:To analyze the curative effect of locking compression pediatric hip plate (LCH-PHP) in the treatment tumor-like lesions of femoral neck in children.Methods:From January 2012 to June 2019, 45 children with Erol type Ⅱ-Ⅳ tumor-like lesions of femoral neck were retrospectively analyzed, involving 32 males and 13 females, aged 2-14 years.Among them, 27 cases were simple bone cyst, 15 cases were fibrous dysplasia, 3 cases were Langerhans histiocytosis, and 17 cases were accompanied with pathological fracture.Patients without pathological fracture were divided into 2 groups according to different surgical methods: lesion removal and bone grafting+ LCH-PHP preventive fixation group (group A) and lesion removal and bone grafting group (group B). Patients with pathological fracture were divided into 2 groups according to the different surgical methods: lesion removal and bone grafting+ LCH-PHP fixation and reduction group (group C) and lesion removal and bone grafting group (group D). The loss of femoral neck-stem angle, healing time and Musculoskeletal Tumor Society (MSTS) scores were compared between group A and group B. Changes of femoral neck-stem angle were compared between group C and group D at postoperative 1 day and the last follow-up.Results:Forty-five patients were followed up for an average of 2.6 (1-4) years.The loss of femoral neck-stem angle in group A and group B were (0.50 ± 0.45)°, and (2.26 ± 1.64)°, which was significantly different ( t=-3.193, P<0.05). There were no significant differences in the healing condition, healing time and MSTS scores at the last follow-up between group A and group B(all P>0.05). In group C, the ipsilateral femoral neck-stem angle at the postoperative 1 day and the last follow-up were (133.67±4.53)°and (133.00±4.32)°, respectively, which was comparable ( P>0.05). In group D, the ipsilateral femoral neck-stem angle at the postoperative 1 day and the last follow-up were (133.36±7.82)°and (130.63±8.24)°, respectively, which was significantly different ( t=7.11, P<0.05). Conclusions:LCH-PHP fixation can effectively maintain the femoral neck-stem angle and prevent the occurrence of pathological fracture children with Erol Ⅱ-Ⅳ tumor-like lesions of femoral neck.
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OBJECTIVES@#To collect and analyze the ECG signal in real time, the analog filter and the signal amplifier were used to construct the abnormal signal acquisition and classification system.@*METHODS@#The ARM10E processor was used to detect the signal shape and QRS complex wave. Based on the Poincare support vector machine, the feature set was extracted from the training data set to construct the heart disease classifier, and the clinical classification model was given.@*RESULTS@#The device effectively reduces computational complexity, improves processor speed, real-time acquisition and diagnoses heart disease.@*CONCLUSIONS@#Portable ECG devices can capture suspected waveforms of abnormal signals, establish and evaluate high quality signals, reduce patient on-line waiting time, and facilitate early diagnosis and recognition of heart disease.
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Humans , Algorithms , Arrhythmias, Cardiac , Diagnosis , Electrocardiography , Heart , Signal Processing, Computer-Assisted , Support Vector MachineABSTRACT
Objective To analyze the clinical characteristics and treatment strategy of ankle supination fracture in children.Methods From January 2012 through July 2014,89 children were treated at our department for ankle fracture caused by supination sprain according to their medical history,physical examination,X-ray films and CT three-dimensional reconstruction of the ankle.Appropriate protocols were applied on the basis of Lauge-Hansen classification,type and displacement of their fractures.Of them,52 belonged to the supination-adduction type (the extramalleolus fracture was of Odgen type Ⅶ in 51 children whose epiphyseal plate of distal fibula had not been closed),35 to the supination-extorsion type (32 cases had tri-plane fracture and 3 Tillaux fracture),and the remaining 2 did not fit the Lauge-Hansen classification.Surgical treatment was applied in 32 cases and conservative treatment in 57 ones.Results All the children received outpatient follow-up from 12 to 24 months(mean,18 months).No bone nonunion,osteoarthritis,or fracture malunion was found.The American Orthopaedic Foot & Ankle Society scores averaged 92 points (range,from 88 to 100 points) at the last follow-ups.Conclusions In children whose epiphyseal plate is nearly closed,supination-adduction sprain likely causes an extramalleolus fracture of Salter-Harris type Ⅰ or type Ⅱ,but in children whose epiphyseal plate is unclosed,an epiphyseal fracture of Odgen type Ⅶ is inclined to happen.A Tillaux fracture or tri-plane fracture at the level of distal tibiofibular syndesmosis results often from supination-extorsion sprain in children.For fractures involving epiphysis or epiphyseal plate,anatomical reduction and proper fixation are critical to functional recovery and reducing complications.
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Object-oriented programming is a basic course of information management and information system. Some measures were thus put forward for the teaching reform of information management and information system course, training the computation thinking and innovation ability of students, according to the problems occurred in its teaching,such as perfecting its teaching system,adjusting its theoretical contents,scientific design of its experi-ments and its examination methods.