The Comparison between Dose Rates at the Interventional Reference Point of the Angiography Systems in Many Facilities

Abstract

The management of the radiation dose is very important in interventional radiology (IVR), especially in percutaneous coronary intervention (PCI). Therefore, we measured entrance surface doses at the interventional reference point of 27 cardiac intervention procedures in 22 cardiac catheterization laboratories around Hiroshima, and compared these doses. Recently, for cardiac interventional radiology, the X-ray machines using flat-panel detectors (FPD) instead of image intensifiers (I.I.) is increasing; 13 systems used FPD and 14 systems used I.I. For fluoroscopy rate, the difference between laboratories was 9 times. For cineangiography rate, the difference between laboratories was 7 times. In addition, between both devices, the I.I. group is bigger than the FPD group. When comparing by the same condition, for the dose at the interventional reference point, no significant difference was detected between the FPD group and the I.I. group. This study shows that FPD is not available for reducing the radiation dose simply. Therefore, it is necessary that we think of the balance with image quality and radiation dose. The optimization of the devices and cardiac intervention procedures becomes very important.

Avaliação da qualidade da imagem e taxa de exposição na cardiologia intervencionista

“…Neste trabalho o objetivo é propor uma forma de avaliar quantitativamente o potencial de otimização dos equipamentos dedicados à cardiologia intervencionista, no desenvolvimento de um protocolo que contivesse os testes para aceitação inicial dos equipamentos de amostragem, os testes de qualidade da imagem (contraste e detalhe) e as medidas da taxa de exposição no detector de imagem (Anderson et al, 2000). (Boone et al, 1993), foi possível avaliar semi-quantitativamente o desempenho dos equipamentos e de um equipamento escolhido aleatoriamente em relação ao grupo de equipamentos e em relação ao esperado internacionalmente (Cowen, 1987;Ishibashi , 2011;Miller, 2012 (Balter, 2006;Lemoigne et al, 2009).…”