These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.
Pubmed for Handhelds
PUBMED FOR HANDHELDS
Search MEDLINE/PubMed
Title: Theoretical and experimental determination of sensitivity and edge enhancement in xeroradiography and ionography. Author: Plewes D, Johns HE. Journal: Med Phys; 1980; 7(4):315-23. PubMed ID: 6446678. Abstract: A study of the factors affecting image quality and x-ray sensitivity of ionography and xeroradiography is presented. First, the relative charge sensitivities (nC/cm2mR) are compared. It is shown that high pressure xenon (10 atm cm) as used in ionography produces more than 2.5--3.5 times more charge than the selenium layers used in xeroradiography for the same x-ray exposure. The influence of development time and toner deposition on the appearance of images is investigated theoretically and experimentally. A parameter describing development sensitivity is proposed. It is shown that an increase in development sensitivity (ODcm2/nC) with increasing development time is accompanied by a loss in edge enhancement. The development sensitivity of ionography is about twice that typical of xeroradiography. This makes the total sensitivity (OD/mR) or the ionography process more than 4.5--6.5 times that of xeroradiography. The total sensitivity of ionography is about 1/2 that of par speed film screen combinations.[Abstract] [Full Text] [Related] [New Search]