Scattered radiation in chest radiography

Journal Article · Thu Jan 01 04:00:00 EST 1981 · Med. Phys.; (United States)

DOI:https://doi.org/10.1118/1.595027· OSTI ID:5543778

Niklason, L T; Sorenson, J A; Nelson, J A

Luminance scatter fractions were measured for patients and phantoms in various regions of the chest film. Scatter fractions were found to be highly variable, being quite high in the regions of the chest with a large equivalent tissue thickness (e.g. mediastinum, chest wall, and subdiaphragmatic areas). For example, approximately 90% of the radiation reaching the mediastinum region of the chest film was found to be scattered radiation when a grid was not used. Even with a 12:1 grid, less than 50% of the available primary beam contrast was being displayed in the mediastinum. In regions of the chest film with high scatter fractions, film latitude was also a problem, further reducing image contrast in these regions. Image contrast and scatter fractions in chest radiography were investigated for different scatter rejection techniques including air gaps, antiscatter grids, and slit radiography.

• Research Organization: University of Utah Medical Center, Salt Lake City
• OSTI ID: 5543778
• Journal Information: Med. Phys.; (United States), Journal Name: Med. Phys.; (United States) Vol. 8:5; ISSN MPHYA
• Country of Publication: United States
• Language: English

Related Subjects

61 RADIATION PROTECTION AND DOSIMETRY
655003* -- Medical Physics-- Dosimetry
BIOMEDICAL RADIOGRAPHY
BODY
BODY AREAS
CHEST
DIAGNOSTIC TECHNIQUES
DOSIMETRY
ELECTROMAGNETIC RADIATION
IMAGES
IONIZING RADIATIONS
MEDICINE
MOCKUP
NUCLEAR MEDICINE
PATIENTS
PHANTOMS
RADIATIONS
RADIOLOGY
SCATTERING
STRUCTURAL MODELS
X RADIATION