Browsing by Author "Vano, E."
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- ItemComparison of two angiographic systems in paediatric interventional cardiology(2015) Ubeda, C.; Vano, E.; Miranda, P.; Aguirre, D.; Riquelme, N.; Guarda Salazar, Eduardo Raimundo
- ItemEntrance surface air kerma in X-ray systems for paediatric interventional cardiology : a national survey(2015) Ubeda, C.; Vano, E.; Miranda, P.; Valenzuela Abarca, Eduardo; Vergara, F.; Guarda, E.
- ItemRADIATION DOSE AND IMAGE QUALITY FOR ADULT INTERVENTIONAL CARDIOLOGY IN CHILE: A NATIONAL SURVEY(2011) Ubeda, C.; Vano, E.; Miranda, P.; Leyton, F.; Valenzuela, E.; Oyarzun, C.The aim of this work was to investigate the differences in dose settings and image quality among 10 X-ray systems used for interventional cardiology in Chile. Entrance surface air kerma (ESAK) was measured on a phantom of 20 cm thickness of polymethyl methacrylate slabs. Image quality was evaluated using DICOM images of a test object Leeds TOR 18-FG for cine mode acquisition, through the numerical parameters signal-to-noise ratio (SNR), high-contrast spatial resolution (HCSR) and figure of merit. ESAK rate values for fluoroscopy modes ranged between 7.1 and 121.7 mGy min(-1). For cine mode, ESAK values per frame ranged from 63 to 400 mu Gy fr(-1). SNR and HCSR parameters for cine mode varied from 4.8 to 8.6 and 0.4 to 10, respectively. FOM values resulted from 6.9 to 64.5 among the different X-ray systems. Results show important differences between systems and point out the need to launch an optimisation programme.