Near-real-time radiography detects 0. 1% changes in areal density with 1-millimeter spatial resolution

Conference · Mon Jun 01 04:00:00 EDT 1987

DOI:https://doi.org/10.1007/978-1-4613-0979-6_103· OSTI ID:6069294

Stupin, D M

Using digital subtraction radiography, the author detects an 0.1% change in areal density in a phantom. Areal density is the product rho x, where rho is the material density and x is the material thickness. Therefore, it is possible to detect an 0.1% difference in either density or thickness in unknown samples. A special x-ray television camera detects the areal density change on the phantom. In a difference image, formed by subtracting the 128-television-frame averages of the phantom image from the phantom-and-step image, the step is resolved with a 1-mm spatial resolution. Surprisingly, crossed 2-..mu..m-diam tungsten wires that overlie the phantom are also detected. This procedure takes a few seconds. The performance of any digital imaging x-ray system will improve by using the averaging and digital subtraction techniques. 8 refs., 6 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6069294
• Report Number(s): LA-UR-87-3026; CONF-870691-4; ON: DE88000534
• Country of Publication: United States
• Language: English

Related Subjects

440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
CAMERAS
DATA
EXPERIMENTAL DATA
IMAGE PROCESSING
INDUSTRIAL RADIOGRAPHY
INFORMATION
MOCKUP
NUMERICAL DATA
PERFORMANCE TESTING
PHANTOMS
PROCESSING
REAL TIME SYSTEMS
RESOLUTION
SPATIAL RESOLUTION
STRUCTURAL MODELS
TESTING
X-RAY RADIOGRAPHY