On 8 June 2016 Laura Kovacs will be presenting her WiSE seminar with the title “Enjoying Research at the Intersection of Math and Computer Science”. Laura Kovacs is Associate Professor of Formal Methods at the Department of Computer Science and Engineering, Chalmers.
Laura Kovacs’ research and teaching focuses on computer theorem proving and symbolic computation, and integrates program analysis techniques with new approaches to program assertion synthesis and automated reasoning. She is the co-developer of the award-winning theorem prover Vampire, with a special role on enhancing theorem prover with novel features for program analysis. She works interdisciplinary, bridging together computer science, mathematics and logic. Laura Kovacs is a Wallenberg Academy Fellow, and she has been awarded the European Research Council Starting Grant. Welcome!
When? Wednesday 8 June, 11:30–13:00 (incl. lunch)
Where? Landahlsrummet (7430), Maskingränd 2, vån 7Ö, Chalmers Johanneberg
During the seminar we offer lunch. Please register by the latest on Friday 3 June with an email to firstname.lastname@example.org.Share this:
On Wednesday, 1 June 1, Hans Emil Atlason, MPBME, will present his master thesis with the title “Inertial sensors for improving electromyographic classification of hand-gestures”.
Time: 14.00 pm. 1 June, 2016
Place: Landahlsrummet (room 7430), Hörsalsvägen 11, 7th floor
Examiner: Bo Håkansson
Supervisor: Max Ortiz Catalan
Introduction: Classification of hand-gestures from electromyography (EMG) could provide robotic prosthetic hand control to transradial amputees. However, the usability of such a system is influenced by many factors, such as arm position and limb movements. Inertial sensors can be used to provide information about arm position and movement, and therefore potentially improve prosthetic hand control. The aims of this thesis were to implement the technology to simultaneously record forearm EMG and inertial signals for hand-gesture classification, evaluate recorded EMG and inertial signals during various movements, and conduct an experiment to compare offline and real-time classification of hand-gestures using different feature-sets of EMG and inertial signals.
Methods: A Motion Processing Unit (MPU) was used to provide accelerometer, gyroscope and magnetometer data. Software for inertial signal recordings was developed in Matlab and added to the myoelectric pattern recognition software BioPatRec for movement classification. Prototype EMG and inertial signals were recorded while a subject performed sharp up-and-down arm movements, and contraction and relaxation of a hand gesture. In the comparison experiment, subjects performed hand gestures while forearm EMG and inertial data was recorded. Signal features were then extracted from EMG, accelerometer, gyroscope, and orientation in Euler angles. Classification performance was compared offline and in real-time (Motion Test).
Results: A Graphical User Interface (GUI) was developed for recording of EMG and inertial signals, and modules for inertial signal treatment were added to BioPatRec. The prototype recordings of simultaneous EMG and inertial signals showed that changes in inertial signals due to arm movements can correlate to movement artifacts in EMG, and that the contraction and relaxation of a hand gesture can be traced using inertial signals. Offline classification showed no statistical differences between the EMG alone and EMG with either accelerometer, gyroscope or Euler angle features. The accelerometer and Euler angle features resulted in higher accuracy than gyroscope features, despite that inertial signals alone are not intended to distinguishing between hand-gestures. No statistically significant difference was found between EMG alone and EMG with gyroscope in the real-time classification of hand gestures.
Conclusions: Inertial sensors showed to provide complementary information to EMG during the execution of hand gesture. This work provides a platform to investigate the potential benefit of inertial sensors for prosthetic control.Share this:
On Friday, 27 May at 9.30 am. Abir Sanizadeh, MPBME, will present her master thesis with the title “Clinical Evaluation of Dose-Guided Adaptive Radiotherapy for Lung Cancer Patients”.
Time: 9.30, 27 May
Place: Lunnerummet (room 3311), Hörsalsvägen 11, 3rd floor
Examiner: Fredrik Kahl
The use of Dose-Guided Adaptive Radiotherapy (DGRT) offers new possibilities to utilize patient imaging data and treatment planning data. Geometric changes are frequent during the course of treatment of lung cancer patients. This may potentially result in deviations between the planned and actual delivered dose. DGRT was defined as the method to assess the quality of the treatment and the dose delivered to the target volume and critical structures of the patient. Integrated Transit Planar EPID Dosimetry (ITPD) is a fast method for absolute in-treatment dose verification and to ensure optimized treatment.
This report project aims at clinical evaluation of adaptive radiotherapy of lung cancer patients and investigates if ITPD could detect geometric changes in lung cancer. This method allows the physicians and oncologists to predict the delivered dose in the routine clinical treatment. In this research project, statistical analysis methods are presented and dose distribution comparison of the treatment plan was calculated in 2D and 3D format.
The primary results of this research show that the reason for adaptation in the 46 patients was change in atelectasis (40%), tumor regression (17%), change in pleural effusion (17%) or other causes (26%). The ITPD method detected 76% of the changes in atelectasis, while only 50% of the tumor regression cases and 42% of the pleural effusion cases were detected. Only 10% of the cases adapted for other.
In a statistical analysis view, the method has a 17% false-positive rate. No significant correlations were found between changes in DVH metrics and γ fail-rates. The conclusion can be drawn that atelectasis changes can be seen by ITPD and for the other geometrical changes; the ITPD is not sensitive enough to capture the clinically relevant changes.
At this lunch seminar we will hear transplant surgeon Niclas Kvarnström at the Sahlgrenska University Hospital talk about two different research projects. The first part is about the uterus transplantation trial, while the second part is about an ongoing project with image guided liver surgery.
Uterus transplantation trial
After a decade of research including several animal uterus transplantation models and publications on ethical considerations, the group lead by professor Mats Brännström initiated the world’s first clinical study of uterus transplantation in 2012.
Nine women with absolute uterine infertility were transplanted with uteri from live donors. So far five of the recipients have delivered healthy babies.
The first part of the seminar is about the background, methods and results of this study.
Image guided liver surgery
The results of surgical removal of tumours in the liver are dependent on the possibility of intraoperative identification of the target area. Modern preoperative imaging has made it possible with accurate diagnose and localization of the tumour. However, during surgery we normally do not have access to the same diagnostic tools. When introducing new imaging technology in the operating room we hope to target the tumour safer with regards to radically removing the tumour and sparing healthy liver parenchyma.
The second part of this seminar is about a unique project combining different new advanced imaging modalities in the operating room.
Welcome to this MedTech West lunch seminar!
When? 11:30-12:30, 30 May, 2016
Where? Hjärtats aula, Vita stråket 12, Sahlgrenska University Hospital
Efter att några av Nordens största arkitektbyråer har tävlat om uppdraget att rita det 90 000 kvadratmeter stora Sahlgrenska Life har nu en vinnare utsetts. Det är Sweco och Arkitema Architects som enligt juryn tillsammans har lyckats skapa det vinnande förslag som ska ge sjukhuset och Göteborgs Universitet nya moderna lokaler för sina verksamheter inom vård, forskning och utbildning. Inte minst kommer Sahlgrenska Life också att innebära en rejäl förstärkning av Göteborgsregionens position inom life science genom att erbjuda en kreativ miljö för näringslivet.
På detta lunchseminarium får du höra projektansvarig Niclas Malmeling från Västfastigheter berätta om bakgrunden till Sahlgrenska Life, arkitekttävlingen, det vinnande bidraget och vad som väntar innan man om några år kan flytta in i de byggnader som ska binda samman Sahlgrenska sjukhuset med universitets verksamhet på Medicinareberget.
Vi bjuder på en lunchsmörgås om du anmäler dig före kl. 13:00 måndagen den 9 maj.
ANMÄL DIG HÄR!
NOTE! This lunch seminar is in Swedish.
NÄR? 11 maj 2016 kl. 11:30-12:15 (13:00 inkl. lunch)
VAR? Hjärtats aula, Vita stråket 12, Sahlgrenska Universitetssjukhuset
Den 7 juni bjuder vi tillsammans med Gothia Forum, Innovationsplattformen och Sahlgrenska Science Park in till en eftermiddag som ska ge dig som arbetar inom medicinteknikbranschen och sjukvården en bredare kunskap om vad klinisk utvärdering är, vilka regler som styr och exempel på hur man kan arbeta i praktiken.
Anmälan gör du senast 25 maj till email@example.com. Vi bjuder på lunchsmörgås, så glöm inte ange eventuella kostrestriktioner i ditt mail. Seminariet är kostnadsfritt.
När? Den 7 juni 2016, kl.11:30-14:45
Var? Hjärtats aula, Vita stråket 12, Sahlgrenska Universitetssjukhuset
11:30 Mingel och lunchsmörgås
12:00 Presentation av arrangörer
12.15 Översiktlig genomgång av klinisk utvärdering och klinisk prövning. Jan Thorelius, Enheten för Medicinteknik, Läkemedelsverket
13:30 Klinisk utvärdering – hur fungerar det i praktiken exempel från ett medicintekniskt bolag. Maria Åberg Håkansson, Senior Medical Affairs Manager och Karin Fredriksson, Regulatory Affairs Manager, Wellspect HealthCare
14:15 Diskussion och avslutning