Measurement of UV Emission from a Diffusing Optical Fiber Using Radiochromic Film

  title={Measurement of UV Emission from a Diffusing Optical Fiber Using Radiochromic Film},
  author={David Welch and Henry M. Spotnitz and David J. Brenner},
  journal={Photochemistry and Photobiology},
Analysis of the emission pattern from optical diffuser tips is vital to their usage in biomedical applications, especially as they find growing functionality beyond established phototherapy techniques. The use of ultraviolet radiation with diffuser tips increases the need to accurately characterize these devices, both for effective application and to avoid potentially dangerous exposure conditions. This study presents a new method to capture the diffusion pattern at a high resolution through… 
Spectroscopy and Light Emitting Diodes Based System in Characterizing External Beam Therapy 3 Films for Solar Ultraviolet Measurement
Gafchromic external beam therapy 3 (EBT3) film has widely been used in medical field applications. Principally, the EBT3 film’s color gradually changes from light green to darker color under
Improved Ultraviolet Radiation Film Dosimetry Using OrthoChromic OC-1 Film
Dosimetry with this film provides a simple, accurate, and inexpensive method of quantifying ultraviolet radiation exposure that is suitable for far‐UVC measurements, and the spectrum of the incident ultraviolet radiation strongly affected the response of the film.
Effect of far ultraviolet light emitted from an optical diffuser on methicillin-resistant Staphylococcus aureus in vitro
This study establishes far-UVC delivered from a laser through an optical diffuser as a viable solution for disinfection of susceptible regions such as around catheters, drivelines, or other skin penetrating medical devices.
Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases
It is shown for the first time that far-UVC efficiently inactivates airborne aerosolized viruses, with a very low dose of 2 mJ/cm2 of 222-nm light inactivating >95% of aerosolization H1N1 influenza virus.
Author Correction: Far-UVC light: A new tool to control the spread of airborne-mediated microbial diseases
It is shown for the first time that far-UVC efficiently kills airborne aerosolized viruses, a very low dose of 2 mJ/cm2 of 222-nm light inactivating >95% of aerosolization H1N1 influenza virus.


Measurement of the Emission Profiles of Cylindrical Light Diffusers Using a Video Technique
A technique originally used for determining the profile of a laser beam with a commercial video camera is adapted in order to measure the distribution of light from a cylindrical diffuser to produce quantitative one-dimensional beam profiles in both the circumferential and axial direction of the light diffuser.
A Comparative Optical Analysis of Cylindrical Diffuser Fibres for Laser Therapy Using Fluorescence Imaging
Abstract. Cylindrical light diffusers are commercially available for clinical applications such as photodynamic therapy (PDT) and interstitial laser photocoagulation (ILP). A fluorescence imaging
Three-dimensional characterization of the light distribution from diffusing cylindrical optical-fiber tips.
The effect of microbending of the fiber on the output intensity distribution, as well as the effect of the choice of laser used, was investigated and was seen to have a significant impact on the uniformity of these diffusers.
Novel cylindrical illuminator tip for ultraviolet light delivery
The design, processing, and sequential testing of a novel cylindrical diffusing optical fiber tip for ultraviolet light delivery is described. This device has been shown to uniformly (+/- 15%)
Angular Dependence of the Efficiency of the UV Sensor Polysulphone Film
The UV dose refers to the physical quantity radiant exposure, which is defined for a plane area element with fixed orientation in space and thus radiation intercepting this area element is weighted
The response of the Gafchromic EBT3 film to short wavelength UV is comparable to the daily safe exposure limits for humans, thus making it valuable as a tool for passive UV radiation monitoring.
Fabrication and characterization of cylindrical light diffusers comprised of shape memory polymer.
A technique for constructing light diffusing devices comprised of a flexible shape memory polymer (SMP) cylindrical diffuser attached to the tip of an optical fiber that consistently withstand over 8 W of incident IR laser light without suffering damage when immersed in water.
Multichannel film dosimetry with nonuniformity correction.
The multichannel dosimetry method was shown to be an effective way to separate out non-dose-dependent abnormalities from radiochromic Dosimetry film images and to improve the integrity of the dose information.
Performance evaluation of cylindrical fiber optic light diffusers for biomedical applications
Dosimetry for intracavity and interstitial light delivery requires next to the knowledge of tissue optical properties and models describing light propagation in tissue also exact knowledge of the
Ultraviolet Radiation Effects Upon the Eye: Problems of Dosimetry
The acute phototoxic effect of ultraviolet radiation (UVR) on the eye, photokeratitis (also known as snow blindness or welder's flash), has long been recognised. Less obvious are potential hazards to