RESUMO
The article is devoted to clinical--economic analysis of modern diagnostic technology--magnetocardiography by analyzing the "cost-effectiveness". Economic effectiveness of diagnosis of coronary artery disease using magnetocardiography in terms of cost/effectivness is shown. The economicaly optimal sequence of several noninvasive methods for diagnosis of coronary artery disease is defined.
Assuntos
Doença da Artéria Coronariana/diagnóstico , Doença da Artéria Coronariana/economia , Análise Custo-Benefício/estatística & dados numéricos , Magnetocardiografia/economia , Modelos Estatísticos , Doença da Artéria Coronariana/fisiopatologia , Ecocardiografia/economia , Ecocardiografia/instrumentação , Teste de Esforço/economia , Teste de Esforço/instrumentação , Humanos , Magnetocardiografia/instrumentação , Fatores de Risco , Tomografia Computadorizada de Emissão/economia , Tomografia Computadorizada de Emissão/instrumentaçãoRESUMO
The purpose of this work was to develop a low-cost magnetocardiography (MCG) system for use at cardiology clinics, without any magnetic shielding. The device consists of seven channels: four signal and three reference channels. The signal channels are based on relaxation-oscillation SQUIDs. The reference channels are assembled into an orthogonal reference vector magnetometer (RVM). The 11-litre magnetotransparent helium cryostat allows operation for 5 days without refilling. With the 4-channel device, it is possible to perform measurements of magnetic maps in a standard 36-point grid so that only 9 spatial positions of the multichannel magnetometer are used; acquiring 30 s of data for each observation point takes about 10-15 minutes. Software was developed for the device adjustment, data acquisition, and data processing, including preliminary processing, MCG-mapping, and medical analysis. Digital filtering, adaptive noise compensation, and averaging are used to suppress magnetic noises. Cardiac sources were modelled with effective magnetic dipoles, and with estimated 2D current density distributions at a frontal plane.