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X-ray Imaging01:24

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German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with X-rays, and by 1900, X-ray was widely...
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X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
08:30

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Published on: September 11, 2011

Radiation dose of interventional radiology system using a flat-panel detector.

Koichi Chida1, Yohei Inaba, Haruo Saito

  • 1Department of Radiological Technology, School of Health Sciences, Faculty of Medicine, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan. chida@mail.tains.tohoku.ac.jp

AJR. American Journal of Roentgenology
|November 26, 2009
PubMed
Summary

Flat-panel detectors (FPDs) in cardiac interventional radiology do not inherently reduce radiation dose compared to image intensifiers (IIs). Practical measures are essential for dose reduction in FPD systems.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Radiation Physics

Background:

  • Cardiac interventional radiology increasingly uses flat-panel detectors (FPDs) for superior imaging performance over image intensifiers (IIs).
  • The actual radiation dose implications of FPDs in clinical cardiac interventional radiology settings remain unclear.

Purpose of the Study:

  • To quantify and compare radiation entrance surface doses during cineangiography and fluoroscopy.
  • To evaluate dose differences between FPD and II systems in cardiac interventional radiology.

Main Methods:

  • Examined 20 radiology systems (11 FPD, 9 II) across 15 cardiac catheterization laboratories.
  • Measured entrance surface doses using 20-cm acrylic plates and a skin dose monitor during cineangiography and fluoroscopy.

Main Results:

  • Fluoroscopy: Average entrance surface doses were statistically similar between FPD (16.63 mGy/min) and II (17.81 mGy/min) systems.
  • Cineangiography: FPD systems showed a slightly lower average entrance surface dose (29.68 mGy/10 s) than II systems (38.50 mGy/10 s), but the difference was not statistically significant.

Conclusions:

  • FPD systems do not inherently offer lower radiation doses than II systems in cardiac interventional radiology.
  • Despite FPDs' good detective quantum efficiency, practical dose reduction strategies are necessary for both FPD and II systems.