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pro vyhledávání: '"H N, Cardinal"'
Publikováno v:
Medical physics. 20(1)
Contrast agents based on the lanthanide elements gadolinium and holmium have recently been developed for magnetic resonance imaging (MRI). Because of the increased atomic number of these elements relative to iodine, these new compounds, used as x-ray
Autor:
H N, Cardinal, A, Fenster
Publikováno v:
Medical physics. 18(5)
In the analysis of x-ray system performance, the log-signal function, or negative logarithm of the relative detector signal, and the analogously defined log-variance function, are of central importance. These are smooth, monotonic functions of object
Publikováno v:
Medical physics. 17(6)
Many applications in radiography require, or would benefit from, the ability to translate, i.e. move, an optical image in the detector plane. In this paper, we describe the design and characterization of a prism-based optical image translator for ins
Autor:
H N, Cardinal, A, Fenster
Publikováno v:
Medical physics. 17(3)
We propose the use of conic and cubic surface equations (surfaces of second and third order) to directly approximate the dual-energy equations (the integral equations for the dual-energy log-signal functions, i.e., the negative logarithms of the rela
Publikováno v:
SPIE Proceedings.
The conventional x-ray image intensifier (XRII) has developed from an aid for fluoroscopy, where resolution is poor and noise high, through XRII photofluorography, where high resolution is needed and noise is moderate, to digital subtraction angiogra
Autor:
H N, Cardinal, A, Fenster
Publikováno v:
Medical physics. 15(2)
It is proposed that digital scanned projection radiography of the chest be performed by using an energy-sensitive septaless xenon ionization detector (SXID) to obtain dual-energy images. The proposed detector is composed of a front region, sensitive