Canadian CT head rule adherence in a rural hospital without in-house computed tomography.

Introduction: We sought to determine the difference between Canadian CT Head Rule (CCHR) indicated imaging rates and actual imaging rates for patients with mild traumatic brain injuries (mTBIs) at a rural emergency department (ED) without in-house computed tomography (CT). In addition, we compared CCHR adherence at a hospital without CT to previous publications from centres with CT to determine if rural populations receive less CT imaging for minor head traumas when indicated by the CCHR.

Methods: This retrospective chart review explored individuals who presented to a rural ED (no in-house CT scanner) with a primary diagnosis of mild head injury or concussion between 1 January 2017 and 31 December 2021.

Optical orbital angular momentum analogy to the Stern-Gerlach experiment.

Symmetry breaking has been shown to reveal interesting phenomena in physical systems. A notable example is the fundamental work of Otto Stern and Walther Gerlach [Stern and Zerlach, Z. Physik9, 349 (1922)10.

Structured light enhanced machine learning for fiber bend sensing.

The intricate optical distortions that occur when light interacts with complex media, such as few- or multi-mode optical fiber, often appear random in origin and are a fundamental source of error for communication and sensing systems. We propose the use of orbital angular momentum (OAM) feature extraction to mitigate phase-noise and allow for the use of intermodal-coupling as an effective tool for fiber sensing. OAM feature extraction is achieved by passive all-optical OAM demultiplexing, and we demonstrate fiber bend tracking with 94.