Literature DB >> 1186633

New device for accurate measurement of the x-ray intensity distribution of x-ray tube focal spots.

K Doi, B Fromes, K Rossmann.   

Abstract

A new device has been developed with which the focal spot distribution can be measured accurately. The alignment and localization of the focal spot relative to the device are accomplished by adjustment of three micrometer screws in three orthogonal directions and by comparison of red reference light spots with green fluorescent pinhole images at five locations. The standard deviations for evaluating the reproducibility of the adjustments in the horizontal and vertical directions were 0.2 and 0.5 mm, respectively. Measurements were made of the pinhole images as well as of the line-spread functions (LSFs) and modulation transfer functions (MTFs) for an x-ray tube with focal spots of 1-mm and 50-mum nominal size. The standard deviations for the LSF and MTF of the 1-mm focal spot were 0.017 and 0.010, respectively.

Entities:  

Mesh：

Year:  1975        PMID： 1186633     DOI： 10.1118/1.594190

Source DB:  PubMed          Journal:  Med Phys        ISSN： 0094-2405            Impact factor:   4.071


  12 in total

1.  Study of the Generalized MTF and DQE for a New Microangiographic System.

Authors:  Iacovos S Kyprianou; Stephen Rudin; Daniel R Bednarek; Kenneth R Hoffmann
Journal:  Proc SPIE Int Soc Opt Eng       Date:  2004-05-06

2.  Intrinsic and total system performance evaluation for a newly developed Solid State X-ray Image Intensifier (SSXII) detector.

Authors:  V Singh; S N Swetadri Vasan; A Jain; P Sharma; D R Bednarek; S Rudin
Journal:  Proc SPIE Int Soc Opt Eng       Date:  2013-03-06

3.  Measurement of the x-ray effective focal spot size with edge response analysis using digital detectors.

Authors:  Masayuki Nishiki; Satoshi Yanagita; Noriko Nishikawa; Hitomi Sugimura
Journal:  J Med Imaging (Bellingham)       Date:  2020-03-23

4.  Evaluation and Comparison of High-Resolution (HR) and High-Light (HL) Phosphors in the Micro-Angiographic Fluoroscope (MAF) using Generalized Linear Systems Analyses (GMTF, GDQE) that include the Effect of Scatter, Magnification and Detector Characteristics.

Authors:  Sandesh K Gupta; Amit Jain; Daniel R Bednarek; Stephen Rudin
Journal:  Proc SPIE Int Soc Opt Eng       Date:  2011

5.  The analysis of rate limitation within enzymes: relations between flux control coefficients of rate constants and unidirectional rates, rate constants and thermodynamic parameters of single isolated enzymes.

Authors:  G C Brown; C E Cooper
Journal:  Biochem J       Date:  1994-05-15       Impact factor: 3.857

6.  Efficiency of the Human Observer Compared to an Ideal Observer Based on a Generalized NEQ Which Incorporates Scatter and Geometric Unsharpness: Evaluation with a 2AFC Experiment.

Authors:  Iacovos S Kyprianou; Arundhuti Ganguly; Stephen Rudin; Daniel R Bednarek; Brandon D Gallas; Kyle J Myers
Journal:  Proc SPIE Int Soc Opt Eng       Date:  2005

7.  Generalized Performance Evaluation of X-ray Image Intensifier compared with a Microangiographic System.

Authors:  Girijesh K Yadava; Iacovos S Kyprianou; Stephen Rudin; Daniel R Bednarek; Kenneth R Hoffmann
Journal:  Proc SPIE Int Soc Opt Eng       Date:  2005

8.  Overcoming x-ray tube small focal spot output limitations for high-resolution region of interest imaging.

Authors:  Sandesh K Gupta; Amit Jain; Daniel R Bednarek; Stephen Rudin
Journal:  Proc SPIE Int Soc Opt Eng       Date:  2012-03-08

9.  Generalized Objective Performance Assessment of a New High-Sensitivity Microangiographic Fluoroscopic (HSMAF) Imaging System.

Authors:  Girijesh K Yadava; Stephen Rudin; Andrew T Kuhls-Gilcrist; Daniel R Bednarek
Journal:  Proc SPIE Int Soc Opt Eng       Date:  2008

10.  Characterization of x-ray focal spots using a rotating edge.

Authors:  Linxi Shi; N Robert Bennett; Adam S Wang
Journal:  J Med Imaging (Bellingham)       Date:  2021-03-25
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