The AAPM/RSNA physics tutorial for residents: Digital fluoroscopy

Robert A. Pooley, J. Mark McKinney, David A. Miller

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

A digital fluoroscopy system is most commonly configured as a conventional fluoroscopy system (tube, table, image intensifier, video system) in which the analog video signal is converted to and stored as digital data. Other methods of acquiring the digital data (eg, digital or charge-coupled device video and flat-panel detectors) will become more prevalent in the future. Fundamental concepts related to digital imaging in general include binary numbers, pixels, and gray levels. Digital image data allow the convenient use of several image processing techniques including last image hold, gray-scale processing, temporal frame averaging, and edge enhancement. Real-time subtraction of digital fluoroscopic images after injection of contrast material has led to widespread use of digital subtraction angiography (DSA). Additional image processing techniques used with DSA include road mapping, image fade, mask pixel shift, frame summation, and vessel size measurement. Peripheral angiography performed with an automatic moving table allows imaging of the peripheral vasculature with a single contrast material injection.

Original languageEnglish (US)
Pages (from-to)521-534
Number of pages14
JournalRadiographics
Volume21
Issue number2
DOIs
StatePublished - Jan 1 2001

Keywords

  • Digital subtraction angiography
  • Fluoroscopy
  • Images, processing
  • Physics
  • Radiography, digital

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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