Results 201 to 210 of about 18,723 (229)

Multi-target passive positioning with signal classification and MIMO radar. [PDF]

Sci Rep
Wang H, Liu X, Lei Z.
europepmc   +1 more source

Prior information-based subtraction radiography for enhanced tumor visibility in image-guided radiotherapy. [PDF]

Front Oncol
Hu Y, Leng S.
europepmc   +1 more source

A method for selective tissue and bone visualization using dual energy scanned projection radiography

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, G, Butt, A, Hall, A, Macovski   +3 more
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<title>Experimental System For Dual Energy Scanned Projection Radiography</title>

SPIE Proceedings, 1981
A. L. Hall, N. J. Pelc, S. J. Riederer, G. S. Keyes, W. R. Brody, L. A. Lehmann, A. Macovski, R. E. Alvarez   +7 more
openaire   +3 more sources

Performance characteristics of a dual‐energy detector for digital scan projection radiography

Medical Physics, 1987
An 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
openaire   +2 more sources

Excretory urography using dual-energy scanned projection radiography.

Radiology, 1981
Excretory 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, W R, Brody, D, Gross, A, Macovski, A, Hall, N, Pelc   +5 more
openaire   +2 more sources

TU-F-18A-06: Dual Energy CT Using One Full Scan and a Second Scan with Very Few Projections

Medical Physics, 2014
Purpose: 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
openaire   +1 more source

Effect of Fixation, Soft-Tissues, and Scan Projection on Bone Mineral Measurements with Dual Energy X-ray Absorptiometry (DXA)

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, N, Krefting, D, Bürklein, F, Eckstein   +3 more
openaire   +2 more sources