Essays about: "Fotonräknande"

Showing result 11 - 13 of 13 essays containing the word Fotonräknande.

  1. 11. Evaluation of the Impact of X-ray Tube Voltage and Filter Thickness on the Performance of Spectral Photon-Counting Detectors

    University essay from KTH/Medicinteknik och hälsosystem

    Author : Cassandra Mannila; Marcus Larsson; [2021]
    Keywords : Photon Counting Detectors; X-ray Tube Voltage; Filter Thickness; Detective Quantum Efficiency; Optimizing; Fotonräknande detektorer; Rörspänning; Filtertjocklek; DQE; Optimering;

    Abstract : During the past years photon-counting detectors (PCDs) have emerged as an alternative to conventional energy-integrating detectors and may significantly improve the standard of care for computed tomography (CT). There are two main alternatives for the material of the detector: cadmium telluride (CdTe) and silicon (Si). READ MORE

  3. 12. Segmentation of People and Vehicles in Dense Voxel Grids from Photon Counting LiDAR using 3D-Unet

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Fredrik Danielsson; [2021]
    Keywords : Deep Learning; LiDAR; Segmentation; Dense Voxel Grids; Single Photon Counting; Machine Learning; 3D U-Net; Convolutional Neural Network;

    Abstract : In recent years, the usage of 3D deep learning techniques has seen a surge,mainly driven by advancements in autonomous driving and medical applications.This thesis investigates the applicability of existing state-of-the-art 3Ddeep learning network architectures to dense voxel grids from single photoncounting 3D LiDAR. READ MORE

  4. 13. Improved Spatial Resolution in Segmented Silicon Strip Detectors

    University essay from KTH/Medicinteknik och hälsosystem

    Author : Eva Bergström; Ida Johansson; [2019]
    Keywords : computed tomography; photon-counting; silicon strip detector; spatial resolution; machine learning; classification; datortomografi; fotonräknande; kiselstrippdetektor; spatiell upplösning; maskininlärning; klassificering;

    Abstract : Semiconductor detectors are attracting interest for use in photon-counting spectral computed tomography. In order to obtain a high spatial resolution, it is of interest to find the photon interaction position. READ MORE