Real-time digital K-edge subtraction fluoroscopy

T. L. Houk, R. A. Kruger, C. A. Mistretta, Stephen J Riederer, C. G. Shaw, J. C. Lancaster, D. C. Flemming

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We report in vitro and in vivo trials of K-edge fluoroscopy, by which iodine contrast concentration is displayed live, with tissue and bone images suppressed, free of patient-motion artifacts. Iodine and cerium, 125 and 225 mg/cm 2 respectively, filter alternate TV fields of cine-pulsed 50 KVP x-rays. Weighted subtraction of successive TV fields isolates the iodine image and simultaneously minimizes artifacts. Digital techniques are used in real time. At our present x-ray tube limit, 500 mA instantaneous current, the patient exposure is 180 mR/sec and quantum mottle limits the image quality. Integrating four successive difference images provides a compromise between mottle and smoothly moving displays. Cardiovascular images of a 17-kg dog, using 1 ml/kg Renografin-60 injected into a foreleg vein, show that a 15-cm chest thickness is our present practical maximum. This method may be useful in diagnosing cardiovascular anomalies in infants without catheterization or suspension of breathing.

Original languageEnglish (US)
Pages (from-to)270-278
Number of pages9
JournalInvestigative Radiology
Volume14
Issue number4
DOIs
StatePublished - 1979
Externally publishedYes

Fingerprint

Fluoroscopy
Iodine
Artifacts
X-Rays
Cerium
Catheterization
Veins
Suspensions
Respiration
Thorax
Dogs
Bone and Bones

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Houk, T. L., Kruger, R. A., Mistretta, C. A., Riederer, S. J., Shaw, C. G., Lancaster, J. C., & Flemming, D. C. (1979). Real-time digital K-edge subtraction fluoroscopy. Investigative Radiology, 14(4), 270-278. https://doi.org/10.1097/00004424-197907000-00002

Real-time digital K-edge subtraction fluoroscopy. / Houk, T. L.; Kruger, R. A.; Mistretta, C. A.; Riederer, Stephen J; Shaw, C. G.; Lancaster, J. C.; Flemming, D. C.

In: Investigative Radiology, Vol. 14, No. 4, 1979, p. 270-278.

Research output: Contribution to journalArticle

Houk, TL, Kruger, RA, Mistretta, CA, Riederer, SJ, Shaw, CG, Lancaster, JC & Flemming, DC 1979, 'Real-time digital K-edge subtraction fluoroscopy', Investigative Radiology, vol. 14, no. 4, pp. 270-278. https://doi.org/10.1097/00004424-197907000-00002
Houk, T. L. ; Kruger, R. A. ; Mistretta, C. A. ; Riederer, Stephen J ; Shaw, C. G. ; Lancaster, J. C. ; Flemming, D. C. / Real-time digital K-edge subtraction fluoroscopy. In: Investigative Radiology. 1979 ; Vol. 14, No. 4. pp. 270-278.
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