Results 201 to 210 of about 6,985,189 (226)
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Medical Physics, 1981
Information contained in the x‐ray energy spectrum can be used to produce selective radiographic images of bone or soft tissue. A method has been devised to separate bone and soft tissue based upon differences in photoelectric absorption and Compton scattering using an appropriate combination of images obtained with radiographic exposures at 70 KVP and
W R, Brody +3 more
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Information contained in the x‐ray energy spectrum can be used to produce selective radiographic images of bone or soft tissue. A method has been devised to separate bone and soft tissue based upon differences in photoelectric absorption and Compton scattering using an appropriate combination of images obtained with radiographic exposures at 70 KVP and
W R, Brody +3 more
openaire +4 more sources
Performance characteristics of a dual‐energy detector for digital scan projection radiography
Medical Physics, 1987An energy discriminating x‐ray detector has been developed for dual‐energy, scan projection digital radiography. The detector is comprised of a pair of x‐ray intensifying screen/linear photodiode arrays, aligned one behind the other. Energy discrimination is achieved by employing a low atomic number phosphor in the front screen and a high atomic number
D R, Morgan, R A, Sones, G T, Barnes
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Excretory urography using dual-energy scanned projection radiography.
Radiology, 1981Excretory urograms of 10 patients were obtained using a GE 8800 CT scanner with Scout View which had been modified for dual-kVp scanned projection radiography. Using this system, it is possible to combine images obtained simultaneously at 85 and 135 kVp to create subtraction images from which substances of desired mean atomic number have been removed ...
F G, Sommer +5 more
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TU-F-18A-06: Dual Energy CT Using One Full Scan and a Second Scan with Very Few Projections
Medical Physics, 2014Purpose: The conventional dual energy CT (DECT) requires two full CT scans at different energy levels, resulting in dose increase as well as imaging errors from patient motion between the two scans. To shorten the scan time of DECT and thus overcome these drawbacks, we propose a new DECT algorithm using one full scan and a second scan with very few ...
T Wang, L Zhu
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Physics and Imaging in Radiation Oncology, 2017 Background and Purpose: Several strategies for estimating stopping power ratio (SPR) from dual-energy CT (DECT) have been proposed to improve accuracy of proton dose calculations.
Jørgen Breede Baltzer Petersen +2 more
exaly +2 more sources
Calcified Tissue International, 2001
The objective of this study was to determine the effect of fixation, soft tissues, and scan projection on bone mineral measurements with dual energy X-ray absorptiometry (DXA). In seven fresh cadavers, DXA scans were obtained within 48 hours of death and after 10 months of fixation with 5% formalin/95% ethanol.
E M, Lochmüller +3 more
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The objective of this study was to determine the effect of fixation, soft tissues, and scan projection on bone mineral measurements with dual energy X-ray absorptiometry (DXA). In seven fresh cadavers, DXA scans were obtained within 48 hours of death and after 10 months of fixation with 5% formalin/95% ethanol.
E M, Lochmüller +3 more
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Dual-energy scanned projection radiography of osseous metastatic disease.
Investigative radiology, 1986Dual-energy scanned projection radiography was used to evaluate eight patients with both lytic and blastic metastatic disease in the axial skeleton. The ability to selectively cancel obscuring soft-tissue structures from images resulted in improved conspicuity of involved sites, compared with conventional radiographic studies, despite greater quantum ...
D J, Sartoris +2 more
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<title>Experimental System For Dual Energy Scanned Projection Radiography</title>
SPIE Proceedings, 1981A. L. Hall +7 more
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