[Postoperative quality of life for patients with a vestibular schwannoma].

OBJECTIVES: To determine the prognoses criteria of quality of life's impairment after vestibular schwannoma surgery. STUDY DESIGN: Our study includes retrospectively 104 consecutive patients operated between 1991 & 2000 of a vestibular schwannoma. Patients with bilateral tumors were not included, neither patients lost of follow-up. The french version of the Short Form-36 self assessment questionnaire was sent to all patients. RESULTS: The response rate was 68% (71 patients). The patients' postoperative quality of life was lower of the norm, especially for psychical dimensions. This impairing of health whatever age, tumor size, operative approach or follow-up time. Sex and 2nd surgery were the only factors associated with a lower score. Women had worse rating of physical functioning. CONCLUSION: To operate small tumors should not assume that the impact on patients'life would be necessary less than following the removal of larger tumors. Women should have particularly clear explications before surgery and while follow-up

Efficient Dike Monitoring Using Terrestrial SFM Photogrammetry

International audienceNature based solutions are growing rapidly in order to mitigate in the near future the effects of climate change and rise of sea level on most anthropogenic coasts. In that frame, the CHERbourg bLOC (CHERLOC) project aims to study new coastal engineering solutions (overtopping, sediment transport) thanks to two new artificial units in two test sites (Normandy, France) considering biodiversity preservation but also societal acceptability. This study details an efficient method to monitor such coastal infrastructure using terrestrial Structure from Motion (SfM). In 2021, surveys were conducted to acquire pictures in April, May, June and November. A time series of 3D photogrammetric models was generated using open source SfM software. The first model was georeferenced using Ground Control Points (GCP) measured by Differential Global Navigation Satellite System (DGNSS) so that it could be used as a reference for the following point clouds using surrounding ripraps assumed to be non-mobile through the period of the study. The georeferencing Root Mean Square Error (RMSE) was found to be 1.8 cm for the April model whereas RMSEs of relative registrations of the following dates were found to be sub-centimetric. These results can be used to observe and measure blocks displacements as well as sand volumes evolution throughout the time series. The biggest displacement was found to be 23 cm between April and June. Sand topographic variation shows a continuous accumulation on selected cross-sections between April and November with an overall height accumulation of about 30 cm. Sand volumes measurements show consistent results with an added volume of 3.67 m3 on the previous areas

Conformal mesh and two-step tomographic imaging of the Supelec breast phantom

The realistic breast phantom developed by the French team at Supelec provides an excellent opportunity to explore various measurement systems and associated algorithms. In this case there is a known ground truth for the geometry of the segmented regions for direct comparison of images with actual sizes, shapes and locations of the different features. It also allows for testing utilizing a range of dielectric materials for both the adipose and fibroglandular region which can be useful given the disparity of published property values. For this experiment, we are exploring our tomographic imaging algorithm with a log transformation in the context of restricting the imaging zone strictly to that space occupied by the phantom. In this case, the 2-dimensional perimeter of the breast was approximated by a simple ellipse which was extracted from the original image. All images were recovered without the assistance of a priori information and also included our 2-step imaging scheme. Simple parameter tests were performed to assess the limitations of the technique, especially when the imaging zone was not accurately determined. The final results were also analyzed by examination of histograms of the field residuals to assess whether the algorithm is robust and unbiased

A switched reader complementary-loops structure for detecting LF RFID tagged pebbles

This paper presents a reader switched complementary loops structure for pebbles RFID tracking. These so-called "smart pebbles" are tagged with LF RFID glasstags and deployed on beaches, in the context of coastal morpho-dynamics survey. At different periods, the detection of these pebbles over the beach has to be done in the minimum of time. The goal of the project LARGE is to provide a RFID reader antenna structure for reducing the time of the glasstags detection. Technical challenges are that LF glasstags detection is very sensitive to its orientation. As the prototype has to adapt to an unknown orientation and depth of the RFID tags, two key ideas are exploited in this work: (i) the use of complementary loops for reducing the orientation sensitivity and (ii) the switching in loop sizes for adapting to optimal depth of tag detection. A prototype is build and tested with a commercial RFID reader and conclusions of our measurements show that detection performances can be increased with this multiple loops and complementary loops structure