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Radiologia Brasileira

On-line version ISSN 1678-7099

Abstract

PARIZOTI, Alexandre  and  NETTO, Thomaz Ghilardi. Study of optimization of images in interventional fluoroscopy. Radiol Bras [online]. 2009, vol.42, n.6, pp.375-378. ISSN 1678-7099.  http://dx.doi.org/10.1590/S0100-39842009000600011.

OBJECTIVE: The objective of the present study is to analyze the optimization of fluoroscopic image quality and patient entrance surface air kerma rate in interventional radiology procedures, utilizing a phantom adapted for fluoroscopy. MATERIALS AND METHODS: The authors utilized a phantom developed for evaluating conventional radiological images adapted for fluoroscopy through the addition of two catheters with different diameters, both of them utilized in interventional radiology. The patient entrance surface air kerma rate was determined with the aid of this phantom. RESULTS: The evaluation of technical parameters for different exposure modes of a digital fluoroscopic imaging system has allowed the determination of the air kerma rate, enabling the optimization of the image quality in interventional procedures. The decrease in the patient entrance surface air kerma rate may achieve 67%. CONCLUSION: The optimization of fluoroscopic image quality achieved with a phantom allows reducing the patient entrance surface air kerma with no significant loss of diagnostic performance.

Keywords : Images optimization; Fluoroscopy; Phantom; Dose reduction.

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