[Hematoma Segmentation of Spontaneous Intracerebral Hemorrhage Based on Watershed and Region-Growing Algorithm].

Objective: To establish a brain hematoma CT image segmentation method based on watershed and region-growing algorithm so as to measure hematoma volume quickly and accurately, to explore the consistency between the results of this segmentation method and those of manual segmentation, the clinical gold standard, and to compare the results of this method with the calculation of the two Tada formulas commonly used in clinical practice. Methods: The preoperative CT images of 152 patients who were treated for spontaneous cerebral hemorrhage at the Department of Neurosurgery, West China Hospital, Sichuan University between January 2018 and June 2019 were retrospectively collected. The CT images were randomly assigned, by using a random number table, to the training set, the test set and the validation set, which contained 100 patients, 22 patients and 30 patients, respectively. The labeling results of the training set and the test set were used in algorithm training and testing. Four methods, namely, manual segmentation, algorithm segmentation, i.e., segmentation calculation based on watershed and regional growth algorithm, Tada formula, i.e., the traditional Tada formula calculation, and accurate Tada formula, i.e., accurate Tada formula calculation based on 3D-Slicer, were applied on the validation set to measure the hematoma volume. The Digital Imaging and Communications in Medicine (DICOM) data of subjects meeting the selection criteria of the study were manually segmented by two experienced neurosurgeons. The hematoma segmentation model was built based on watershed algorithm and regional growth algorithm. Seed point selected by neurosurgeons was taken as the starting point of growth. Regional grayscale difference criterion combined with manual segmentation validation were adopted to determine the regional growth threshold that met the segmentation precision requirements for intracranial hematoma. Using manual segmentation as the gold standard, Bland-Altman consistency analysis was used to verify the consistency of the three other methods for measuring hematoma volume. Results: With manual segmentation as the gold standard, among the three methods of measuring hematoma volume, algorithm segmentation had the smallest percentage error, the narrowest range of difference, the highest intra-group correlation coefficient (0.987), good consistency, and the narrowest 95% limits of agreement ( LoA). The percentage error of its segmentation was not statistically significant for hematomas of different volumes. Conclusion: The segmentation method of spontaneous intracerebral hemorrhage based on watershed and regional growth algorithm shows stable measurement performance and good consistency with the clinical gold standard, which has considerable clinical significance, but it still needs further validation with more clinical samples.

[Application of Improved Unet Network in the Recognition and Segmentation of Hemorrhage Regions in Brain CT Images].

OBJECTIVE: To examine the performance and application value of improved Unet network technology in the recognition and segmentation of hemorrhage regions in brain CT images. METHODS: A total of 476 brain CT images of patients with spontaneous intracerebral hemorrhage (SICH) were retrospectively included. The improved Unet network was used to identify and segment the hemorrhage regions in the patients' brain CT images. The CT imaging data of the hemorrhage regions were manually labelled by clinicians. After randomized sorting, 430 data sets from 106 patients were selected for inclusion in the training set and 46 data sets from 11 patients were included in the test set. After data enhancement, the experimental data set underwent network training and model testing in order to assess the segmentation performance. The segmentation results were compared with the those of the Unet network (Base), FCN-8s network and Unet++ network. RESULTS: In the segmentation of brain CT image hemorrhage region with the improved Unet network, the three evaluation indicators of Dice similarity coefficient, positive predictive value (PPV), and sensitivity coefficient (SC) reached 0.8738, 0.9011 and 0.8648, respectively, increasing by 8.80%, 7.14% and 8.96%, respectively, compared with those of FCN-8s, and increasing by 4.56%, 4.44% and 4.15%, respectively, compared with those of Unet network (Base). The improved Unet network also showed better segmentation performance than that of Unet++ network. CONCLUSION: The improved method based on Unet network proposed in this report displayed good performance in the recognition and segmentation of hemorrhage regions in brain CT images, and is an appropriate method for the recognition and segmentation of hemorrhage regions in brain CT images, showing potential application value for assisting clinical decision-making and preventing early hematoma expansion.

Stored autologous blood transfusion does not increase recurrence of prostate cancer after radical prostatectomy: A preliminary study / 中华男科学杂志

Objective@#To analyze the association of stored autologous blood transfusion (SABT) with tumor recurrence in PCa patients after radical prostatectomy and explore the application of SABT in this surgical procedure.@*METHODS@#Forty-five PCa patients underwent radical prostatectomy in our hospital in recent five years, of whom, 20 received SABT (group A) and the other 25 allogeneic blood transfusion (group B) intraoperatively. After surgery, we followed up the patients regularly for 3－66 months by examination of the levels of total PSA (tPSA) and free PSA (fPSA), digital rectal examination (DRE), and MRI to observe the biochemical recurrence of the tumor. We compared the data obtained between the two groups of patients.@*RESULTS@#In group A, 8 cases were in stages T1a－T1b and 12 in stages T2a－T2c, and in group B, 14 cases were in stages T1a－T1b and 11 in stages T2a－T2c. The volume of transfused blood was 800 ml in group A and 400－1 200 ml in group B. No statistically significant differences were observed between the two groups in the operation time, intraoperative blood loss or postoperative Gleason scores (P > 0.05), nor in the tPSA level or the results of DRE and MRI at 12, 24, 36, 48 and over 48 months (P > 0.05).@*CONCLUSIONS@#SABT is safe for PCa patients undergoing radical prostatectomy and does not increase the tumor recurrence rate after surgery.

Development Trend of Medical Facilities' Data Analysis and Decision in Operation and Maintenance / 中国医院管理

In order to clarify the research directions of medical facilities' data analysis and decision in operation and maintenance management,the paper illustrates current functions of medical facilities operation and maintenance from the following aspects:building hospital intelligent management,power supply and distribution system's safety,energy consumption's optimization,network's optimization and complex medical equipment's operation guarantee.The problems of data analysis and decision about hospital facilities' operation and maintenance management are summarized.Four kinds of data decision models are put forward,including risk identification,health assessment of equipment,faults prediction and diagnosis,and management optimization.These methods could provide reference for the development of medical facilities' operation and maintenance.

Evaluation on the design and application effect of pure water analysis system of medical proton and heavy ion accelerator / 中国医学装备

Objective: To design an online pure water analysis system based on the proton and heavy ion accelerator (IONTRIS system) in Shanghai proton and heavy ion center (SPHIC), and to evaluate its application effect by operating data statistics. Methods: The system used the control system of Siemens S7-300 PLC to collect online data from sensors of pure water system. Analyzing the operation rules and setting the limiting value of alarm, and using WINCC software to develop monitoring and analysis system of central computer so as to real-time operate online data. The application effect of the system was evaluated by comparing the cost of one month consumables between before and after the system was applied. Results: After the system was applied, the real-time monitoring of pure water system was realized, and the efficiency of the consumables was enhanced. Conclusion: The application of the pure water analysis system has a good effect on the operation efficiency of the pure water system.

Effects of calcium phosphate cement/eucommia ulmoides extracts compound on cell proliferation and adhesion of MC3T3E1 osteoblasts in vitro / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To observe the effects of calcium phosphate cement/eucommia ulmoides extracts compound (CPC/EUE) on cell proliferation and adhesion of MC3T3E1 osteoblasts in vitro.</p><p><b>METHODS</b>Cultured MC3T3E1 osteoblasts were divided into 5 groups: blank control, CPC/EUE 0, 0.152, 0.304 and 0.608 mg/ml. 3H-TdR and scan electronic microscopy (SEM) were used to observe the cell growth, proliferation and adhesion.</p><p><b>RESULT</b>The CPC/EUE compound enhanced the cell growth, proliferation and adhesion. The concentrations of 0.152 mg/ml, 0.304 mg/ml were more significant in enhancing the cell proliferation rate (P<0.05).</p><p><b>CONCLUSION</b>CPC/EUE can promote the cell growth, proliferation and adhesion of the osteoblasts.</p>

Detection of expression of Th1/Th2 cytokines in jurkat cell treated with gamma-interferon by cytometric bead array / 中国实验血液学杂志

In order to explore the value of gamma-interferon (IFN-gamma) in therapy of T lymphoid leukemia and role of cytometric bead array (CBA) method in detection of Th1/Th2 cytokines expression, the Jurkat cells were cultured for 48 hours in different concentration of IFN-gamma, the expressions of IL-2, IL-6, INF-gamma and TNF-alpha in culture supernatants were assayed by CBA method; CD25 expression was assayed by flow cytometry. The results showed that the expressions of IL-2, TNF-alpha were enhanced in INF-gamma dose-dependent way, and the expression of CD25 was also enhanced, but there was no expression of IL-6. It is concluded that Jurkat cells induced by IFN-gamma were able to express high-level of Th1 cytokine and IL-2 membrane receptor (CD25), and the CBA method can be used to exactly evaluate the dynamic change of Th1/Th2 cytokines.