FusionFormer: A Multi-sensory Fusion in Bird's-Eye-View and Temporal Consistent Transformer for 3D Objection

Multi-sensor modal fusion has demonstrated strong advantages in 3D object detection tasks. However, existing methods that fuse multi-modal features through a simple channel concatenation require transformation features into bird's eye view space and may lose the information on Z-axis thus leads to inferior performance. To this end, we propose FusionFormer, an end-to-end multi-modal fusion framework that leverages transformers to fuse multi-modal features and obtain fused BEV features. And based on the flexible adaptability of FusionFormer to the input modality representation, we propose a depth prediction branch that can be added to the framework to improve detection performance in camera-based detection tasks. In addition, we propose a plug-and-play temporal fusion module based on transformers that can fuse historical frame BEV features for more stable and reliable detection results. We evaluate our method on the nuScenes dataset and achieve 72.6% mAP and 75.1% NDS for 3D object detection tasks, outperforming state-of-the-art methods

The resting-state functional magnetic resonance imaging of PTSD after subarachnoid hemorrhage: a preliminary study

Abstract Background: Subarachnoid hemorrhage (SAH) is a devastating disease that can cause post-traumatic stress disorder (PTSD). In this study we compared 11 post-SAH PTSD patients with equal number of gender-matched SAH patients without PTSD. Methods: We used resting-state functional magnetic resonance imaging (rs-fMRI) to detect the amplitude of low frequency fluctuation (ALFF) of whole brains. Results: Compared with the control group, ALFFs in the PTSD group increased significantly in the left amygdala, left anterior cingulate gyrus, right insular lobe and right dorsolateral prefrontal cortex (dlPFC) after SAH, but decreased significantly in bilateral lingual gyrus. Conclusions: In our limited experience, post-SAH PTSD may have specific rs-fMRI features that are different from PTSD caused by exogenous traumatic events. However, we should be cautious due to the relatively small sample size of this preliminary study. The results may be helpful for the classification of PTSD and lay the foundation for the design of treatment strategy in the future.</jats:p