Characterization of the imaging properties of x-ray focal spots

M Trefler, JE Gray - Applied Optics, 1976 - opg.optica.org
The imaging characteristics of diagnostic x-ray systems are dependent, in part, upon the size,
shape, and intensity distribution of the x-ray source. These properties, however, vary with …

Comparison of dosimetry and image quality in computed and conventional tomography

W Maue-Dickson, M Trefler, DR Dickson - Radiology, 1979 - pubs.rsna.org
Comparison was made of tomograms of a phantom head and a normal adult cadaver head
on GE CT/T, Delta 50, EMI 5005, and CGR Stratomatic units. Image quality was ranked as …

Phase effects in diagnostic radiological images

JE Gray, M Trefler - Medical Physics, 1976 - Wiley Online Library
The effect of phase on the quality of diagnostic radiological images is investigated on a
theoretical basis and with the use of the computer simulations. Phase effects are divided into two …

Digital tomographic filtering of radiographs

…, AN Venetsanopoulos, M Trefler - IEEE Transactions on …, 1983 - ieeexplore.ieee.org
Conventional radiographs do not provide information about the depths of details and
structures because they are two-dimensional projections of three-dimensional bodies. Taking …

Service offshoring: Threats and opportunities [with Comments and Discussion]

D Trefler, D Rodrik, P Antràs - Brookings trade forum, 2005 - JSTOR
… Finally, let me move to Trefler's third main point. His argument rests on the premises that (a) …
In light of our results, Trefler's first premise can be empirically validated by testing whether …

Capabilities, wealth, and trade

J Sutton, D Trefler - Journal of Political Economy, 2016 - journals.uchicago.edu
We explore the relation between a country’s income and the mix of products it exports. Both
are simultaneously determined by countries’ capabilities, that is, by countries’ productivity …

Bargaining with asymmetric information in non-stationary markets

D Trefler - Economic Theory, 1999 - Springer
The Rubinstein and Wolinsky bargaining-in-markets framework is modified by the introduction
of asymmetric information and non-stationarity. Non-stationarity is introduced in the form …

[BOOK][B] The Long and Short of the Canada-US Free Trade Agreement

D Trefler - 1999 - users.econ.umn.edu
The CanadaMU. S. Free Trade Agreement (FTA) provides a unique window on the effects of
trade liberalization. It was an unusually clean trade policy exercise in that it was not bundled …

Measurements of the partial volume phenomenon

H Turnier, PV Houdek, M Trefler - Computerized Tomography, 1979 - Elsevier
The partial volume phenomenon can produce subtle changes in the reconstructed value of
the linear attenuation coefficient which may in turn make the detection of an object more …

Design and implementation of digital tomographic filters

…, AN Venetsanopoulos, M Trefler - IEEE Transactions on …, 1983 - ieeexplore.ieee.org
A technique is proposed which allows the selective filtering of conventional radiographs in
order to obtain depth-dependent information by utilizing the depth-dependent information …