Ces radiol. 2013, 67(3):232-237

Exposure parameters of cine mode and fluoroscopy mode of the angiography systemOriginal article

Lucie Súkupová

Institut klinické a experimetnální medicíny, Praha

Aim: The aim of this work was to analyse exposure parameters of cine mode and fluoroscopy mode and therefore to understand the automatic exposure control of an angiography system used for interventional cardiology procedures. The influence of the additional filtration on dose to patients was assessed.

Methods: The study was performed on the angiography system Axiom Artis MP with an image intensifier. Exposure parameters selected by the automatic exposure control of many cine modes for adult patients as well as for pediatric patients were analysed. Mainly it included tube voltage, tube current, pulse width and additional filtration.

Results: The main difference between cine mode and fluoroscopy mode was in used tube current and pulse width, smaller difference was between additional filtration. With increasing thickness of the phantom, the AEC makes the tube current increase, pulse width and voltage is kept constant. With still increasing phantom width, current and pulse width increase, voltage is kept constant. Then tube current, pulse width and also voltage increase. With voltage increased, the additional filtration is lowered.

Conclusion: The exposure parameters of cine mode were a little bit different from parameters of fluoroscopy mode. Thicker additional filtration significantly lowers the skin dose to patients but cannot be used for obese patients due to excessive X-ray tube loading.

Keywords: angiography system, additional filtration, exposure parameters, skin dose

Accepted: March 15, 2013; Published: September 1, 2013  Show citation