1887
banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Evaluation of the microangiographic fluoroscope (MAF) using generalized system performance metrics
Rent:
Rent this article for
USD
10.1118/1.4792460
    + View Affiliations - Hide Affiliations
    Affiliations:
    1 Toshiba Stroke and Vascular Research Center, University at Buffalo, State University of New York, Buffalo, New York 14214
    2 Toshiba Stroke and Vascular Research Center, Department of Radiology, Department of Neurosurgery, and Department of Physiology and Biophysics, University at Buffalo, State University of New York, Buffalo, New York 14214
    3 Toshiba Stroke and Vascular Research Center, Department of Radiology, Department of Neurosurgery, Department of Physiology and Biophysics, Department of Mechanical and Aerospace Engineering, Department of Electrical Engineering, and Department of Biomedical Engineering, University at Buffalo, State University of New York, Buffalo, New York 14214
    a) Author to whom correspondence should be addressed. Electronic mail: ajain6@buffalo.edu; Telephone: 716-829-5409; Fax: 716-829-2212.
    Med. Phys. 40, 031915 (2013); http://dx.doi.org/10.1118/1.4792460
/content/aapm/journal/medphys/40/3/10.1118/1.4792460
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/3/10.1118/1.4792460
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic of MAF showing locations of fiber-optic plates (FOP), fiber-optic taper, light image intensifier (LII), and CsI(Tl) input phosphor.

Image of FIG. 2.
FIG. 2.

MAF in deployed position in front of a FPD with a custom-made detector changer on a C-arm gantry to facilitate switching between detectors.

Image of FIG. 3.
FIG. 3.

Experimental setup showing location of head phantom for scatter measurements.

Image of FIG. 4.
FIG. 4.

Measured scatter fraction as a function of lead disc size for two different air-gaps. The intercept on the y-axis represents the scatter fraction without the perturbation of the disc.

Image of FIG. 5.
FIG. 5.

Scatter and focal spot MTFs.

Image of FIG. 6.
FIG. 6.

Measured MTF for the MAF and the FPD.

Image of FIG. 7.
FIG. 7.

Measured NNPS for the MAF (a) and the FPD (b) for different detector exposures.

Image of FIG. 8.
FIG. 8.

Calculated DQE for the MAF and the FPD for exposures of 39.3 and 44.5 μR, respectively.

Image of FIG. 9.
FIG. 9.

GMTFs for the MAF showing the effect of the choice of the focal spot size. Three different focal spots were used with a magnification factor of 1.20 and zero scatter fraction.

Image of FIG. 10.
FIG. 10.

GDQEs for the MAF showing the effect of the choice of the focal spot size. Three different focal spots with a magnification factor of 1.20 and zero scatter fraction.

Image of FIG. 11.
FIG. 11.

GMTF comparisons for the MAF and the FPD. Small and large focal spot with a scatter fraction of 0.33 and a magnification factor of 1.20.

Image of FIG. 12.
FIG. 12.

GDQE comparisons for the MAF and the FPD. Small and large focal spot with a scatter fraction of 0.33 and a magnification factor of 1.20.

Image of FIG. 13.
FIG. 13.

Images of a coronary stent with 100 μm struts were taken with the MAF using identical techniques parameters (RQA 5 spectrum with about 40 μR per frame detector entrance exposure and geometric magnification of 1.2) with three different focal spots. The arrow in each image shows the location for the line profiles shown in Fig. 14 .

Image of FIG. 14.
FIG. 14.

Comparison of line profiles taken from the same locations in the stent images for the small and large focal spots shown in Fig. 13 . (The location of the line profiles is shown by the lines with arrows in Fig. 13 .) A total of seven different peaks indicated by the arrows in this figure were identified to calculate contrast.

Loading

Article metrics loading...

/content/aapm/journal/medphys/40/3/10.1118/1.4792460
2013-02-28
2014-04-23
Loading

Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Evaluation of the microangiographic fluoroscope (MAF) using generalized system performance metrics
http://aip.metastore.ingenta.com/content/aapm/journal/medphys/40/3/10.1118/1.4792460
10.1118/1.4792460
SEARCH_EXPAND_ITEM