Journal ArticleDOI
Improved control of image optical density with low-dose digital and conventional radiography in bedside imaging.
C M Schaefer,Reginald Greene,J. W. Oestmann,J M Kamalsky,Deborah A. Hall,H J Llewellyn,C. Robertson,James T. Rhea,H. Rosenthal,J R Rubens +9 more
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TLDR
It is concluded that digital radiography produces more consistent and ideal image density and performs at least as well as conventional radiography under phantom test conditions.Abstract:
The technical and diagnostic performance of simultaneously acquired low-dose (44% of standard dose) storage-phosphor digital radiographs (system resolution = 0.2 mm, 10 bits) were compared with those of standard-dose conventional bedside radiographs of the chest in 32 patients. The mean optical density (OD) of the lungs (800 measurements) was closer to the ideal density with digital radiography (1.45 OD +/- 0.20 [standard deviation] vs 1.75 OD +/- 0.53) and was less often outside the usable range (2.5% vs 42.5%). Receiver operating characteristic analysis for detection of simulated nodules and monitoring devices (nine readers, 4,608 observations) showed that digital radiography was superior to conventional radiography (P less than .05) for four of the nine readers and equivalent to conventional radiography for five readers. The authors concluded that digital radiography produces more consistent and ideal image density and performs at least as well as conventional radiography under phantom test conditions.read more
Citations
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Comparison of a photostimulable phosphor system with film for dental radiology
TL;DR: Major benefits of photostimulable phosphor systems include the elimination of chemical processing and an improved low contrast detectability performance.
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Imaging of the intensive care unit patient.
TL;DR: As demonstrated throughout this article, CT has played an increasingly important role in the evaluation of the critically ill patient, and the results are especially impressive, because most were obtained on earlier-generation CT machines, which are now totally outdated.
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A-Si:H/CsI(Tl) flat-panel versus computed radiography for chest imaging applications: image quality metrics measurement.
Xinming Liu,Chris C. Shaw +1 more
TL;DR: Measurements of image quality metrics, including the modulation transfer functions (MTFs), noise power spectra (NPSs), and detective quantum efficiencies (DQEs), for the FP and CR systems are presented and compared and show that the flat-panel system has slightly lower MTF but significantly higher DQEs than the CR system.
Patent
Intermediate density marker and a method using such a marker for radiographic examination
TL;DR: In this article, a partially radiolucent, partially radiopaque marker and a method for using such a marker for radiographic examination was presented. But the marker and the disclosed method may be employed for the examination of tissue structures of various densities, and the radiographic density and thickness of the marker are selected so that when the marker is exposed to x-ray radiation of a specified energy, the marker casts a legible shadow without obscuring anatomical detail present in the underlying tissue structure.
Journal ArticleDOI
Evaluation of soft-tissue foreign bodies: comparing conventional plain film radiography, computed radiography printed on film, and computed radiography displayed on a computer workstation.
B Reiner,Eliot L. Siegel,T McLaurin,Stuart R. Pomerantz,R Allman,J R Hebel,S Fritz,Zenon Protopapas +7 more
TL;DR: Computed radiography-soft copy is the preferred imaging technique for the detection of wood and plastic foreign bodies in soft tissue regardless of the size of the wood or the plastic.