The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform
Jon Hyett - One of the best experts on this subject based on the ideXlab platform.
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The Identification and Tracking of Uterine Contractions Using Template Based Cross-Correlation
Annals of Biomedical Engineering, 2017Co-Authors: Sarah C. Mcdonald, Graham Brooker, Hala Phipps, Jon HyettAbstract:The purpose of this paper is to outline a novel method of using template based cross-correlation to identify and track uterine contractions during labour. A purpose built six-channel Electromyography (EMG) device was used to collect data from consenting women during labour and birth. A range of templates were constructed for the purpose of identifying and tracking uterine activity when cross-Correlated with the EMG signal. Peak finding techniques were applied on the cross-Correlated Result to simplify and automate the identification and tracking of contractions. The EMG data showed a unique pattern when a woman was contracting with key features of the contraction signal remaining consistent and identifiable across subjects. Contraction profiles across subjects were automatically identified using template based cross-correlation. Synthetic templates from a rectangular function with a duration of between 5 and 10 s performed best at identifying and tracking uterine activity across subjects. The successful application of this technique provides opportunity for both simple and accurate real-time analysis of contraction data while enabling investigations into the application of techniques such as machine learning which could enable automated learning from contraction data as part of real-time monitoring and post analysis.
Balaji Singh Krishna - One of the best experts on this subject based on the ideXlab platform.
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Role of 99mTc-HIDA Scan for Assessment of Gallbladder Dyskinesia and Comparison of Gallbladder Dyskinesia with Various Parameters in Laparoscopic Cholecystectomy Patients
Hindawi Limited, 2019Co-Authors: Manuneethimaran Thiyagarajan, Eniyan Kamaraj, Nitesh Navrathan, Mohanapriya Thyagarajan, Balaji Singh KrishnaAbstract:Objectives. Pathogenesis of gallstone includes bile stasis due to defect in the gallbladder muscle contraction. Our aim of the study is to find out the role of 99mTc-HIDA scan in assessment of gallbladder dyskinesia in cholelithiasis patients before laparoscopic cholecystectomy and compare the gallbladder dyskinesia with various parameters like symptoms of patients, diabetic status of patients, gallstones size and number, and cholecystitis features in histopathology report after surgery. Material and Method. This is a prospective observational study conducted at our hospital for three years. Totally 40 patients with gallstone were subjected to 99mTc-HIDA scan, to assess the ejection fraction of gallbladder. For all these patients detailed clinical history, presence of comorbid illness like diabetics, and symptomatology were elicited. For all patients, ultrasonogram of abdomen was done to assess number and size of stones. All parameters were tabulated and Correlated. Result. While comparing 99mTc-HIDA scan findings with symptoms of patients, 21.2% were asymptomatic and 78.8% symptomatic patients who had ejection fraction less than 80%. All patients in EF >80% group were symptomatic only. It is not statistically significant. On comparing 99mTc-HIDA scan findings with diabetic status of the patients, 42.4% of diabetic and 57.6 % of nondiabetic patients had ejection fraction less than 80%. It is not statistically significant (0.681). While comparing 99mTc-HIDA scan findings with size of the gallstone in ultrasound, 63.6% patients with size less than 1cm and 36.4% with size more than 1cm had ejection fraction < 80%. It is statistically significant (0.048). On comparing 99mTc-HIDA scan findings with number of stones in ultrasound, 18.2% single gallstone patients and 81.8% multiple gallstone patients had EF less than 80% which is statistically significant (0.001). While comparing the 99mTc-HIDA scan findings with histopathology report after laparoscopic cholecystectomy, 21.2% non-cholecystitis patients and 78.8% cholecystitis patients had EF less than 80%, which is statistically (0.017) significant. Conclusion. 99mTc-HIDA scan can be an accurate method to diagnose the gallbladder dyskinesia. Gallbladder dyskinesia in 99mTc-HIDA scan can be used to predict large size stones and multiple stones before surgery. The sensitivity can be improved by 99mTc-HIDA scan in diagnosing cholecystitis patients
Sarah C. Mcdonald - One of the best experts on this subject based on the ideXlab platform.
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The Identification and Tracking of Uterine Contractions Using Template Based Cross-Correlation
Annals of Biomedical Engineering, 2017Co-Authors: Sarah C. Mcdonald, Graham Brooker, Hala Phipps, Jon HyettAbstract:The purpose of this paper is to outline a novel method of using template based cross-correlation to identify and track uterine contractions during labour. A purpose built six-channel Electromyography (EMG) device was used to collect data from consenting women during labour and birth. A range of templates were constructed for the purpose of identifying and tracking uterine activity when cross-Correlated with the EMG signal. Peak finding techniques were applied on the cross-Correlated Result to simplify and automate the identification and tracking of contractions. The EMG data showed a unique pattern when a woman was contracting with key features of the contraction signal remaining consistent and identifiable across subjects. Contraction profiles across subjects were automatically identified using template based cross-correlation. Synthetic templates from a rectangular function with a duration of between 5 and 10 s performed best at identifying and tracking uterine activity across subjects. The successful application of this technique provides opportunity for both simple and accurate real-time analysis of contraction data while enabling investigations into the application of techniques such as machine learning which could enable automated learning from contraction data as part of real-time monitoring and post analysis.
Manuneethimaran Thiyagarajan - One of the best experts on this subject based on the ideXlab platform.
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Role of 99mTc-HIDA Scan for Assessment of Gallbladder Dyskinesia and Comparison of Gallbladder Dyskinesia with Various Parameters in Laparoscopic Cholecystectomy Patients
Hindawi Limited, 2019Co-Authors: Manuneethimaran Thiyagarajan, Eniyan Kamaraj, Nitesh Navrathan, Mohanapriya Thyagarajan, Balaji Singh KrishnaAbstract:Objectives. Pathogenesis of gallstone includes bile stasis due to defect in the gallbladder muscle contraction. Our aim of the study is to find out the role of 99mTc-HIDA scan in assessment of gallbladder dyskinesia in cholelithiasis patients before laparoscopic cholecystectomy and compare the gallbladder dyskinesia with various parameters like symptoms of patients, diabetic status of patients, gallstones size and number, and cholecystitis features in histopathology report after surgery. Material and Method. This is a prospective observational study conducted at our hospital for three years. Totally 40 patients with gallstone were subjected to 99mTc-HIDA scan, to assess the ejection fraction of gallbladder. For all these patients detailed clinical history, presence of comorbid illness like diabetics, and symptomatology were elicited. For all patients, ultrasonogram of abdomen was done to assess number and size of stones. All parameters were tabulated and Correlated. Result. While comparing 99mTc-HIDA scan findings with symptoms of patients, 21.2% were asymptomatic and 78.8% symptomatic patients who had ejection fraction less than 80%. All patients in EF >80% group were symptomatic only. It is not statistically significant. On comparing 99mTc-HIDA scan findings with diabetic status of the patients, 42.4% of diabetic and 57.6 % of nondiabetic patients had ejection fraction less than 80%. It is not statistically significant (0.681). While comparing 99mTc-HIDA scan findings with size of the gallstone in ultrasound, 63.6% patients with size less than 1cm and 36.4% with size more than 1cm had ejection fraction < 80%. It is statistically significant (0.048). On comparing 99mTc-HIDA scan findings with number of stones in ultrasound, 18.2% single gallstone patients and 81.8% multiple gallstone patients had EF less than 80% which is statistically significant (0.001). While comparing the 99mTc-HIDA scan findings with histopathology report after laparoscopic cholecystectomy, 21.2% non-cholecystitis patients and 78.8% cholecystitis patients had EF less than 80%, which is statistically (0.017) significant. Conclusion. 99mTc-HIDA scan can be an accurate method to diagnose the gallbladder dyskinesia. Gallbladder dyskinesia in 99mTc-HIDA scan can be used to predict large size stones and multiple stones before surgery. The sensitivity can be improved by 99mTc-HIDA scan in diagnosing cholecystitis patients
P.-o. Nyström - One of the best experts on this subject based on the ideXlab platform.
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Grade of prolapse and symptoms of haemorrhoids are poorly Correlated: Result of a classification algorithm in 270 patients.
Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland, 2008Co-Authors: Roger Gerjy, A. Lindhoff-larson, P.-o. NyströmAbstract:Purpose: Haemorrhoid prolapse is an indication for surgery. A correlation between worsening anatomy and increasing symptoms is commonly assumed. We developed a classification algorithm of prolapse ...
