LOCAL CONSTRUCTION OF BATTERY POWERED DUAL FACE RADIOGRAPHIC VIEWING BOX WITH ROTATABLE NECK AND ADJUSTABLE STAND

INTRODUCTION
Radiographic viewing box is an illuminator use in viewing radiographs. Proper viewing conditions are very important when interpreting a radiograph. The viewing condition can enhance or degrade the subtle detail of the radiograph14. Before beginning the evaluation of radiograph, the viewing equipment and area should be considered. The area should be clean and free of distracting materials, magnifying aids, and film makers should be close at hand. Its function being to improves subject contrast of a radiographic image by enhancing the visualization of radiographs without which a radiographic image even with a good objectives contrast may not be well interpreted due to difference in perception of radiographic contrast by different observers9. X-ray illuminators have found increasing use in recent years as a tool for diagnosing medical problem.
         
Since the discovery of  x-ray in 1895 by William roentgen in Germany, many x-ray equipment and accessories have evolved, all aiming at proper radiation protection and adequate diagnosis of illnesses. Among these inventions are the x-ray illuminators, which play an important role in film viewing, perception and interpretation of visible images.

TABLE OF CONTENTS
Title page    
Dedication    
Acknowledgement     
Table of contents    

CHAPTER ONE
Background of study    
Introduction    
Statement of problem    
Purpose of study    
Significance of study
Scope of study
Review of related literature

CHAPTER TWO
Theoretical background    
2.1  Viewing conditions    
Observer and visual acuity    
Those relating to the illuminator
2.2 Features of illuminator boxes
2.3 How to carry quality control test for illuminator
Direct assessment of surface perspex screen of illuminator
Assessment of the surface perspex screen of illuminator using black card.
2.4     Care of illuminators
2.5 Materials use in construction of illuminator  box
Plastic
Metals
2.6    Electrical components    
A rechargeable battery    
A switch    
Electrical wire    
A choke
Transformer

CHAPTER THREE
Materials and methods
3.1      Preliminary steps    
3.2     Choice of design    
3.3    Fabrication of the illuminator housing  
The head:
Components and systems required:  
3.4 Machinery used in this contruction    
3.5       Sources of materials    
Other materials required and reasons
3.6   Fabrication procedure
Plate marking and cutting
Folding of plate
Welding    
Drilling     
Filling
Painting    
Fabrication of the perspex screen.
Materials used in the production of the screen
Procedure
3.7   Voltage regulator circuit
Circuit operation    
The stand and base

CHAPTER   FOUR
4.1   Research findings/ quality control tests    
4.1.1    Uniformity of the intensity of illuminator
Determination of the uniformity of the intensity of ilumination.
Procedures:    
4.1.2 Measuring the temperature of the surface    
over a period of time.    
Quality control test for maximum discharging time    
Summary of results
Recommendation from the study    
Area of further studies     
Limitations of study    
Conclusion    
References