Journal of Medical Physics
 Home | Search | Ahead of print | Current Issue | Archives | Instructions | Subscription | Login  The official journal of AMPI, IOMP and AFOMP      
 Users online: 407  Home  EMail this page Print this page Decrease font size Default font size Increase font size 
Year : 1993  |  Volume : 18  |  Issue : 2  |  Page : 32-34

A Fast Response Wide Range Solid State Densitometer

Correspondence Address:
H.K Pendurkar

Login to access the Email id

Source of Support: None, Conflict of Interest: None

Rights and PermissionsRights and Permissions

Routine assessment of radiation doses for about 18,000 persons per month is still being carried out by the Radiation Protection Services Division through its Film Badge Service, in addition to 21,000 per month through TLD. This necessitated, earlier, the development of a semiautomatic Film Densitometer Reader which uses a densitometer having an expensive photomultiplier with associated high voltage supply and elaborate electronic circuitry covering a linear range of 0-4 optical density. This paper describes a linear densitometer developed using an ultrasensitive fast response silicon photodiode (which forms part of a solid state photo detector - amplifier combination) and a temperature compensated log ratio amplifier. The instrument is simple, cost-effective and reliable. It measures diffuse optical density of the monitor film in the range of 0 to 5 with a least measurable density of 0.01.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded113    
    Comments [Add]    

Recommend this journal