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1.
Journal of Biomedical Engineering ; (6): 1193-1202, 2021.
Article in Chinese | WPRIM | ID: wpr-921861

ABSTRACT

As a common disease in nervous system, epilepsy is possessed of characteristics of high incidence, suddenness and recurrent seizures. Timely prediction with corresponding rescues and treatments can be regarded as effective countermeasure to epilepsy emergencies, while most accidental injuries can thus be avoided. Currently, how to use electroencephalogram (EEG) signals to predict seizure is becoming a highlight topic in epilepsy researches. In spite of significant progress that made, more efforts are still to be made before clinical applications. This paper reviews past epilepsy studies, including research records and critical technologies. Contributions of machine learning (ML) and deep learning (DL) on seizure predictions have been emphasized. Since feature selection and model generalization limit prediction ratings of conventional ML measures, DL based seizure predictions predominate future epilepsy studies. Consequently, more exploration may be vitally important for promoting clinical applications of epileptic seizure prediction.


Subject(s)
Electroencephalography , Epilepsy/diagnosis , Humans , Machine Learning , Seizures/diagnosis , Signal Processing, Computer-Assisted
2.
Chinese Journal of Digestion ; (12): 337-341, 2019.
Article in Chinese | WPRIM | ID: wpr-756295

ABSTRACT

Objective To evaluate the short-term efficacy of combination of 125 I seed brachytherapy and cetuximab in postoperation recurrent rectum cancer.Methods From July 2014 to June 2018,at Affiliated Hospital of Shandong Academy of Medical Sciences,57 patients with postoperation recurrent rectal cancer were recruited.According to therapy the patients were divided into two groups:the radiotherapy group (30 cases) treated with radioactive 125I seeds alone and the combination treatment group (27 cases) treated with combination of radioactive 125I seeds and cetuximab.The tumor size,pain relief and adverse reactions were observed in both groups.Chi-square test were performed for statistical analysis.Results After treatment for six months,the total efficacy rate and local control rate of combination treatment group were 54.2% (13/24) and 87.5% (21/24),respectively;and which were higher than those of radiotherapy group (17.9%,5/28 and 39.3%,11/28),and the differences were statistically significant (x2 =15.01 and 2.55,both P < 0.05).At one month after treatment,the pain relief rate of radiotherapy group and combination treatment group was 70.0% (21/30) and 85.2% (23/27),respectively,and there was no statistically significant difference between the two groups (P > 0.05).After treatment for six months,the rates of adverse reactions of radiotherapy group and combination treatment group were 46.7 % (14/30) and 63.0% (17/27),respectively,there was no statistically significant difference between the two groups (P > 0.05).The symptoms of patients with radiation injury significantly improved after symptomatic treatment.Conclusion The short-term efficacy of combination of 125 I seed brachytherapy and cetuximab is better than that of 125 I seed brachytherapy alone in patients with postoperation recurrent rectum cancer.

3.
Article in Chinese | WPRIM | ID: wpr-514882

ABSTRACT

Objective To investigate the clinical value of the transluminal radiofrequency catheter ablation (RFCA) for malignant esophageal obstruction.Methods The retrospective cross-sectional descriptive study was conducted.The clinicopathological data of 52 patients with malignant esophageal obstruction who underwent transluminal RFCA at the Affiliated Hospital of Shandong Academy of Medical Science between March 2013 and March 2016 were collected.Patients received the bipolar radiofrequency ablation (RFA) under dualchannel endoscopy and X-ray.Observation indicators:(1) intra-and post-operative situations:operation situations,operation time,time of RFA,postoperative complications and duration of postoperative hospital stay,(2) follow-up.Follow-up using outpatient examination and telephone interview was performed to detect the subsequent treatment,survival of patients and recurrence of esophageal obstruction up to June 2016.Measurement data with normal distribution were represented as average (range).Results (1) Intra-and post-operative situations:52 patients underwent successful RFCA,without the occurrence of aspiration,asphyxia,hemorrhage and perforation.Esophageal obstruction was disappeared after treatment,X-ray findings showed a smooth esophagus.Average operation time and time of RFCA were respectively 58 minutes (range,20-71 minutes) and 23 minutes (range,8-42 minutes).Patients took liquid food at postoperative day 2 and normal food at postoperative day 3,without the sensations of esophageal obstruction.Of 52 patients,1 with postoperative hypotension returned to normal level through rehydration and increasing blood volume.Five patients with postoperative substernal pain were improved after 2-day symptomatic treatment.And other 46 patients didn't have postoperative complications.Average duration of postoperative hospital stay was 3 days (range,1-5 days).(2)Follow-up:52 patients were followed up for 3-24 months,with a median time of 13 months.Of 52 patients,17 underwent single intravascular interventional therapy,15 underwent intravascular interventional therapy combined with single systemic chemotherapy,14 underwent single systemic chemotherapy and other 6 didn't undergo antineoplastic therapy.During the follow-up,9 patients didn't have esophageal obstruction and 26 were complicated with esophageal obstruction again.Esophageal obstruction of 26 patients was respectively occurred at 3-8 months postoperatively,20 patients were improved after bipolar transluminal RFCA under dual-channel endoscopy and X-ray and 6 received parenteral nutrition support therapy due to extreme exhaustion.Seventeen patients died of cachexia caused by terminal malignant tumors.Conclusion Transluminal RFCA is safe and effective for malignant esophageal obstruction,with a good short-term outcome.

4.
Article in Chinese | WPRIM | ID: wpr-662818

ABSTRACT

Objective To explore the feasibility, safety and preliminary efficacy of radioactive gastric tube of 125Ⅰ seeds in the treatment of advanced esophageal carcinoma. Methods For 10 cases with advanced esophageal carcinoma, the tumor target area was outlined in the TPS system according to preoperative CT images. Prescription dose was 60 Gy with 125Ⅰ seed radioactivity of 2. 22 × 107 Bq. Accordingly, the 125Ⅰ seeds number and the appropriate gastric tube was decided. Then, depending on the location of the tumor and certain rules, 125Ⅰ seeds were fixed in the tube wall to make the radioactive 125Ⅰ seeds gastric tube. Under the C-arm X-ray fluoroscopy, the radioactive 125Ⅰ seeds gastric tubes were placed into esophageal carcinoma site of the patients. Results The radioactive 125Ⅰ seeds gastric tubes of 10 patients were successfully placed, without esophageal perforation, bleeding complications and so on. In one month after operation, all patients with dysphagia′s Stooler classification score were 2 -3 level,of which one case died of other basic diseases in three months after operation, and six cases achieved 0 -1 level while the other three cases achieved 1 -2 level in four months after operation. There were no cases of postoperative chest pain, bleeding, pneumonia and other related complications. Conclusions The radioactive 125Ⅰ seeds gastric tube could not only help to solve nutrition problems, but also the intracavitary brachytherapy inhibit the growth of tumor, which is safe and feasible in clinical use. It can be used as a palliative treatment for patients with advanced esophageal carcinoma.

5.
Article in Chinese | WPRIM | ID: wpr-662817

ABSTRACT

Objective To study the dosimetry distribution of 125Ⅰ seed chains with different radians in different curvatures of bile ducts. Methods The outlines were drawn on the papers, which are the seed chain models with different radians. Radians formula (radian length=2πr × angle/360) was used to calculate the corresponding 0°, 30°, 60°, 90°, 120°, 150° and 180° models with a radian length at 45 mm, for the total length of seed chain model was 45 mm, and the seeds, had no interval or linear arrangements. The image was transmitted to the Brachytherapy planning system for seeds implantation( TPS) to simulate the seed chains with different radians. Using TPS to delineate the tumor target area, of which the activity was set as 1. 85 × 107 Bq, and the prescription dose was 60 Gy. It was prescribed to simulate the bile duct ( diameter at 8 mm) . TPS were used to calculate the D90 and V100 of the simulated bile duct with the diameter at 8 mm, and explore dosimetry of the points at the centripetal and centrifugal sides with 5 mm vertical distance which from two endpoints and center of seed chains with different radians. Results When the radian of seed chain was 30°, the D90and the V100 were the highest (the D90 was 132 Gy; the V100 was 100%). While the radian was 60°, the D90 and the V100 were the lowest (the D90 was 45 Gy, the V100 was 68%). As the radian was 30°, the highest dose was in the center ( dose in the centripetal side was 165 Gy, and centrifugal side dose was 142 Gy) . The center has the lowest dose as the radian up to 180°(dose in the centripetal side was 90 Gy, and centrifugal side dose was 50 Gy) . Among all radians, dose in the centripetal side was always higher than centrifugal side in the center. Between two endpoints, dose in the centrifugal side was higher than centripetal. Conclusions Distribution of seed chain dosage also changed along with the change of radian. When the radian of seed chain was 30°, the D90 and the V100 were the highest. The centripetal dose was higher than that of the centrifugal side.

6.
Article in Chinese | WPRIM | ID: wpr-660805

ABSTRACT

Objective To explore the feasibility, safety and preliminary efficacy of radioactive gastric tube of 125Ⅰ seeds in the treatment of advanced esophageal carcinoma. Methods For 10 cases with advanced esophageal carcinoma, the tumor target area was outlined in the TPS system according to preoperative CT images. Prescription dose was 60 Gy with 125Ⅰ seed radioactivity of 2. 22 × 107 Bq. Accordingly, the 125Ⅰ seeds number and the appropriate gastric tube was decided. Then, depending on the location of the tumor and certain rules, 125Ⅰ seeds were fixed in the tube wall to make the radioactive 125Ⅰ seeds gastric tube. Under the C-arm X-ray fluoroscopy, the radioactive 125Ⅰ seeds gastric tubes were placed into esophageal carcinoma site of the patients. Results The radioactive 125Ⅰ seeds gastric tubes of 10 patients were successfully placed, without esophageal perforation, bleeding complications and so on. In one month after operation, all patients with dysphagia′s Stooler classification score were 2 -3 level,of which one case died of other basic diseases in three months after operation, and six cases achieved 0 -1 level while the other three cases achieved 1 -2 level in four months after operation. There were no cases of postoperative chest pain, bleeding, pneumonia and other related complications. Conclusions The radioactive 125Ⅰ seeds gastric tube could not only help to solve nutrition problems, but also the intracavitary brachytherapy inhibit the growth of tumor, which is safe and feasible in clinical use. It can be used as a palliative treatment for patients with advanced esophageal carcinoma.

7.
Article in Chinese | WPRIM | ID: wpr-660803

ABSTRACT

Objective To study the dosimetry distribution of 125Ⅰ seed chains with different radians in different curvatures of bile ducts. Methods The outlines were drawn on the papers, which are the seed chain models with different radians. Radians formula (radian length=2πr × angle/360) was used to calculate the corresponding 0°, 30°, 60°, 90°, 120°, 150° and 180° models with a radian length at 45 mm, for the total length of seed chain model was 45 mm, and the seeds, had no interval or linear arrangements. The image was transmitted to the Brachytherapy planning system for seeds implantation( TPS) to simulate the seed chains with different radians. Using TPS to delineate the tumor target area, of which the activity was set as 1. 85 × 107 Bq, and the prescription dose was 60 Gy. It was prescribed to simulate the bile duct ( diameter at 8 mm) . TPS were used to calculate the D90 and V100 of the simulated bile duct with the diameter at 8 mm, and explore dosimetry of the points at the centripetal and centrifugal sides with 5 mm vertical distance which from two endpoints and center of seed chains with different radians. Results When the radian of seed chain was 30°, the D90and the V100 were the highest (the D90 was 132 Gy; the V100 was 100%). While the radian was 60°, the D90 and the V100 were the lowest (the D90 was 45 Gy, the V100 was 68%). As the radian was 30°, the highest dose was in the center ( dose in the centripetal side was 165 Gy, and centrifugal side dose was 142 Gy) . The center has the lowest dose as the radian up to 180°(dose in the centripetal side was 90 Gy, and centrifugal side dose was 50 Gy) . Among all radians, dose in the centripetal side was always higher than centrifugal side in the center. Between two endpoints, dose in the centrifugal side was higher than centripetal. Conclusions Distribution of seed chain dosage also changed along with the change of radian. When the radian of seed chain was 30°, the D90 and the V100 were the highest. The centripetal dose was higher than that of the centrifugal side.

8.
Article in Chinese | WPRIM | ID: wpr-468845

ABSTRACT

Objective To explore the clinical efficacy of image-guided 125I radioactive seed interstitial implantation therapy for unresectable pancreatic cancer.Methods 25 patients with unresectable pancreatic cancer evaluated by retrospective follow-up were enrolled in this study,13 patients received radioactive seeds implantation while 12 patients were given non-surgical treatment.We observe and compare the clinical benefits,objective curative effect,complications,adverse reaction,survival between the two groups of patients.Results Compared with the non-surgical treatment group,the clinical benefit rate in the radiotherapy seed implantation group was 92% (12/13) while that of the non-surgical group was 42% (5/12),the difference was of statistically significance.The numbers of cases evaluated as effective were 6 (46%) and 4 (33 %) respectively,the difference was not statistical significant (x2 =0.427,P > 0.05);The radioactive seed implantation group had no serious postoperative complications;3 cases who received subsequent chemotherapy in radioactive seed implantation group(23%,3/13) and 3 cases in non-surgical treatment group(25%,3/12)suffered from serious adverse reactions,the difference was of no statistical significance(x2 =0.013,P >0.05);Comparing the survival rate between the two groups,x2 =0.001,P =0.969,the difference was of no statistical significance.Conclusions The therapy of 125I radioactive seed implantation for unresectable pancreatic cancer significantly relieves cancer caused pain and improves quality of life.

9.
Article in Chinese | WPRIM | ID: wpr-437669

ABSTRACT

Objective To investigate interventional procedures and polygene feasibility for the treatment of liver carcinoma.Methods pCMV-p53 plasmid-liposome complex and concentrated TKCD retrovirus of supernatant liquid were prepared along with rabbit VX2 liver tumor models of 50 adult New Zealand rabbits.VX2 liver tumors about 2 cm in diameter from 45 adult rabbits were randomly divided into 5 groups of 9.Group 1 was the control group that used 0.9% sodium chloride as a placebo.Group 2 had transcatheter arterial embolization with lipiodol as treatment.Group 3 was the lipiodol and p53 group.Group 4 was the lipiodol and TK/CD group.Group 5 was the lipiodol,p53,and TK/CD group.The microtubule(1.2f)was inserted from the femoral to hepatic artery,tumor supply arteries were demonstrated by angiograms,and the drug was slowly injected under x-ray.The VX2 liver tumors were examined with B-ultrasound and computed tomography for maximum diameter (a) and minimum diameter (b) before and 10 days after interventional therapy.Gross tumor volume (V=ab2/2) and tumor growth rate were calculated.All the adult rabbits were euthanized 8 weeks after interventional therapy (including natural deaths).Histopathological examination was taken and survival time was observed.Results The tumor volume among the 5 groups had no significant difference before interventional therapy (P>0.05).Ten days after interventional therapy,analysis of the tumor volume for variance and the T-test were carried out.The results showed that each group compared to the control showed a significant difference in inhibiting cancer growth (P<0.05).The lipiodol,p53,and TK/CD group showed the best effect.According to factorial statistic analysis (2x2),p53 or TK/CD combined with lipiodol therapy can control the tumor obviously,but no mutual synergism effect was found (P=0.793).Each treatment group showed a significant difference of prolonged survival time compared to the control group (P<0.01).The multi-treatment or multi-gene group showed the best curative effects.Conclusions Interventional therapy can be the ideal path for administering medications for gene therapy.Transcatheter arterial embolization with lipiodol,wild-type p53 gene,TK/GCV,and CD/5-Fc applied in combination can control tumor growth and prolong survival time.

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