You need JavaScript to view this

Significance of quantum fluctuations in roentgen imaging

Journal Article:

Abstract

Quantum fluctuations in the roentgen radiation relief are analysed mathematically. The intrinsic signal-to-noise ratio of the radiation relief for a given object contrast is proportional to the square root of the number of photons contributing to the image of a characteristic detail in the object. In the presence of secondary radiation the signal-to-noise ratio is impaired, since the fluctuations of secondary radiation increase the noise of the radiation relief. By efficient secondary screening, the quality of the relief can be partially recovered. With a dynamically limited recording device, i.e. a film-screen combination, increased detection speed in conjunction with improved secondary screening will either result in unchanged image quality with the gain of an object-dose reduction or provide improved imaging at an unchanged dose value. As regards the relation between contrast resolution and spatial resolution, the dose required to barely demonstrate an object detail of given geometry and composition is found to vary inversely with the fourth power of the linear size of the detail. It is also concluded that recording and secondary-screening devices should always be considered together as far as recording quality is concerned.
Authors:
Strid, K G [1] 
  1. Sahlgrenska Sjukhuset, Goeteborg (Sweden)
Publication Date:
Jan 01, 1980
Product Type:
Journal Article
Reference Number:
AIX-12-607671; EDB-81-112004
Resource Relation:
Journal Name: Acta Radiol.: Oncol., Radiat. Phys., Biol.; (Sweden); Journal Volume: 19:2
Subject:
62 RADIOLOGY AND NUCLEAR MEDICINE; BIOMEDICAL RADIOGRAPHY; SIGNAL-TO-NOISE RATIO; IMAGES; NOISE; RESOLUTION; X RADIATION; X-RAY RADIOGRAPHY; DIAGNOSTIC TECHNIQUES; ELECTROMAGNETIC RADIATION; INDUSTRIAL RADIOGRAPHY; IONIZING RADIATIONS; MEDICINE; NUCLEAR MEDICINE; RADIATIONS; RADIOLOGY; 550602* - Medicine- External Radiation in Diagnostics- (1980-)
OSTI ID:
6162827
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: AROND
Submitting Site:
INIS
Size:
Pages: 129-137
Announcement Date:

Journal Article:

Citation Formats

Strid, K G. Significance of quantum fluctuations in roentgen imaging. Sweden: N. p., 1980. Web.
Strid, K G. Significance of quantum fluctuations in roentgen imaging. Sweden.
Strid, K G. 1980. "Significance of quantum fluctuations in roentgen imaging." Sweden.
@misc{etde_6162827,
title = {Significance of quantum fluctuations in roentgen imaging}
author = {Strid, K G}
abstractNote = {Quantum fluctuations in the roentgen radiation relief are analysed mathematically. The intrinsic signal-to-noise ratio of the radiation relief for a given object contrast is proportional to the square root of the number of photons contributing to the image of a characteristic detail in the object. In the presence of secondary radiation the signal-to-noise ratio is impaired, since the fluctuations of secondary radiation increase the noise of the radiation relief. By efficient secondary screening, the quality of the relief can be partially recovered. With a dynamically limited recording device, i.e. a film-screen combination, increased detection speed in conjunction with improved secondary screening will either result in unchanged image quality with the gain of an object-dose reduction or provide improved imaging at an unchanged dose value. As regards the relation between contrast resolution and spatial resolution, the dose required to barely demonstrate an object detail of given geometry and composition is found to vary inversely with the fourth power of the linear size of the detail. It is also concluded that recording and secondary-screening devices should always be considered together as far as recording quality is concerned.}
journal = {Acta Radiol.: Oncol., Radiat. Phys., Biol.; (Sweden)}
volume = {19:2}
journal type = {AC}
place = {Sweden}
year = {1980}
month = {Jan}
}