Syndication

martedì 9 giugno 2015

Pericoli dalla Risonanza Magnetica

Viene pubblicato un estensivo lavoro di raccolta di precedenti studi sugli effetti di una macchina di indagine a risonanza magnetica su organismi cellulari sia umani che di batteri.

Il risultato di correlazione è positivo, per cui, pur valutando come questa tecnica sia molto importante nella diagnostica ospedaliera in quanto non invasiva, gli autori segnalano che debbono essere approfonditi gli studi per individuare protocolli che determino condizioni di maggiore sicurezza.


Ovviamente, quanto sopra non vale per le persone elettrosensibili, in quanto queste macchine generano diversi campi:
- statico magnetico
- magnetico dinamico che varia in base al tempo
- radiofrequenze !
e quindi ... fuggire !!!   idem dalla TAC , dai raggi X , .... rimane solo l'ecografia !



Magnetic resonance imaging (MRI): A review of genetic damage investigations
Vijayalaxmi, Fatahi M, Speck O. Magnetic resonance imaging (MRI): A review of genetic damage investigations. Mutat Res Rev Mutat Res. 2015 Apr-Jun;764:51-63. doi: 10.1016/j.mrrev.2015.02.002. Epub 2015 Feb 21.

Abstract

Magnetic resonance imaging (MRI) is a powerful, non-invasive diagnostic medical imaging technique widely used to acquire detailed information about anatomy and function of different organs in the body, in both health and disease. It utilizes electromagnetic fields of three different frequency bands: static magnetic field (SMF), time-varying gradient magnetic fields (GMF) in the kHz range and pulsed radiofrequency fields (RF) in the MHz range. There have been some investigations examining the extent of genetic damage following exposure of bacterial and human cells to all three frequency bands of electromagnetic fields, as used during MRI: the rationale for these studies is the well documented evidence of positive correlation between significantly increased genetic damage and carcinogenesis. Overall, the published data were not sufficiently informative and useful because of the small sample size, inappropriate comparison of experimental groups, etc. Besides, when an increased damage was observed in MRI-exposed cells, the fate of such lesions was not further explored from multiple 'down-stream' events. This review provides: (i) information on the basic principles used in MRI technology, (ii) detailed experimental protocols, results and critical comments on the genetic damage investigations thus far conducted using MRI equipment and, (iii) a discussion on several gaps in knowledge in the current scientific literature on MRI. Comprehensive, international, multi-centered collaborative studies, using a common and widely used MRI exposure protocol (cardiac or brain scan) incorporating several genetic/epigenetic damage end-points as well as epidemiological investigations, in large number of individuals/patients are warranted to reduce and perhaps, eliminate uncertainties raised in genetic damage investigations in cells exposed in vitro and in vivo to MRI.
http://1.usa.gov/1QGGT5u

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