Refine
Year of publication
- 2010 (342) (remove)
Institute
- Fachbereich Medizintechnik und Technomathematik (72)
- Fachbereich Wirtschaftswissenschaften (41)
- IfB - Institut für Bioengineering (40)
- Fachbereich Elektrotechnik und Informationstechnik (37)
- Fachbereich Energietechnik (35)
- Fachbereich Chemie und Biotechnologie (34)
- Fachbereich Maschinenbau und Mechatronik (31)
- Fachbereich Bauingenieurwesen (24)
- Fachbereich Luft- und Raumfahrttechnik (24)
- INB - Institut für Nano- und Biotechnologien (24)
Language
- English (185)
- German (155)
- Italian (1)
- Multiple languages (1)
Document Type
- Article (178)
- Conference Proceeding (73)
- Book (38)
- Part of a Book (20)
- Conference: Meeting Abstract (12)
- Patent (7)
- Report (5)
- Other (2)
- Part of a Periodical (2)
- Contribution to a Periodical (1)
Keywords
Design and initial performance of PlanTIS: a high-resolution positron emission tomograph for plants
(2010)
Positron emitters such as 11C, 13N and 18F and their labelled compounds are widely used in clinical diagnosis and animal studies, but can also be used to study metabolic and physiological functions in plants dynamically and in vivo. A very particular tracer molecule is 11CO2 since it can be applied to a leaf as a gas. We have developed a Plant Tomographic Imaging System (PlanTIS), a high-resolution PET scanner for plant studies. Detectors, front-end electronics and data acquisition architecture of the scanner are based on the ClearPET™ system. The detectors consist of LSO and LuYAP crystals in phoswich configuration which are coupled to position-sensitive photomultiplier tubes. Signals are continuously sampled by free running ADCs, and data are stored in a list mode format. The detectors are arranged in a horizontal plane to allow the plants to be measured in the natural upright position. Two groups of four detector modules stand face-to-face and rotate around the field-of-view. This special system geometry requires dedicated image reconstruction and normalization procedures. We present the initial performance of the detector system and first phantom and plant measurements.
Following the success of PET/CT during the last decade and the recent increasing proliferation of SPECT/CT, another hybrid imaging instrument has been gaining more and more interest: MR-PET. First combined, simultaneous PET and MR studies carried out in small animals demonstrated the feasibility of the new approach. Concurrently, some prototypes of an MR-PET scanner for simultaneous human brain studies have been built, their performance is being tested and preliminary applications have already been shown. Through this pioneering work, it has become clear that advances in the detector design are necessary for further optimization.
Recently, the different issues related to the present state and future prospects of MR-PET were presented and discussed during an international 2-day workshop at the Forschungszentrum Jülich, Germany, held after, and in conjunction with, the 2008 IEEE Nuclear Science Symposium and Medical Imaging Conference in Dresden, Germany on October 27–28, 2008. The topics ranged from small animal MR-PET imaging to human MR-BrainPET imaging, new detector developments, challenges/opportunities for ultra-high field MR-PET imaging and considerations of possible future research and clinical applications. This report presents a critical summary of the contributions made to the workshop.
Gas sensor investigation based on a catalytically activated thin-film thermopile for H2O2 detection
(2010)
Simultaneous detection of cyanide and heavy metals for environmental analysis by means of µISEs
(2010)
Shakedown analysis of two dimensional structures by an edge-based smoothed finite element method
(2010)
Comparison of Intravenous Immunoglobulins for Naturally Occurring Autoantibodies against Amyloid-β
(2010)
Realization of a calorimetric gas sensor on polyimide foil for applications in aseptic food industry
(2010)
Normative Regulations
(2010)
During the development process of a complex technical product, one widely used and important technique is accelerated testing where the applied stress on a component is chosen to exceed the reference stress, i.e. the stress encountered in field operation, in order to reduce the time to failure. For that, the reference stress has to be known. Since a complex technical product may fail regarding numerous failure modes, stress in general is highly dimensional rather than scalar. In addition, customers use their products individually, i.e. field operation should be described by a distribution rather than by one scalar stress value. In this paper, a way to span the customer usage space is shown. It allows the identification of worst case reference stress profiles in significantly reduced dimensions with minimal loss of information. The application example shows that even for a complex product like a combustion engine, stress information can be compressed significantly. With low measurement effort it turned out that only three reference stress cycles were sufficient to cover a broad range of customer stress variety.