EMF and Health, by Dr. Eshwar Chandra
-
Upload
the-radiation-doctor -
Category
Mobile
-
view
293 -
download
1
description
Transcript of EMF and Health, by Dr. Eshwar Chandra
![Page 1: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/1.jpg)
Dr N Eshwar Chandra MD DNB FRCR FICR
• MBBS Kakatiya Medical College, Warangal, AP
• MD & DNB PGIMER, Chandigarh
• FRCR Royal College of Radiologists, London
• Present Professor and Head of Radiology, employment Kamineni Academy of Medical Sciences,
Hyderabad
• Memberships IRIA, ISPR, ISNR, ISVIR, IMA, ECR, RSNA, RCR, Musculoskeletal Society
• Publications 6
• Invited lectures Over 80
![Page 2: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/2.jpg)
Electromagnetic fields & Health
Dr N Eshwar ChandraProfessor & HOD
Kamineni Academy of Medical Sciences, Hyderabad
![Page 3: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/3.jpg)
What is EMF• Electromagnetic field:
A physical field produced by electrically charged objects which affects the behavior of charged objects in the vicinity of the field.
![Page 4: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/4.jpg)
What are the types of EMF?
• Nonionising radiation – radio, computer, microwave, cell phone
• Ionising radiation – X rays, gamma rays
![Page 5: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/5.jpg)
What are the types of nonionisingradiation
• Extremely low frequency: <300 Hz
Electricity power supply and electric appliances
• Intermediate frequency: 300 Hz-10 MHz
computer screens, antitheft devices, security systems
• Radiofrequency: 10 MHz-300 GHz
Radio, television, radar and cellular phones & microwave ovens
![Page 6: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/6.jpg)
What are the causes of natural sources of EMF ?
![Page 7: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/7.jpg)
What are the causes of man made sources of EMF ?
![Page 8: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/8.jpg)
What are the effects of EMF?
• Biological Effect: A biological effect is the physical alteration that occurs within an organism following an exposure that causes a measurable change in biology.
• Production of heat, auditory clicks
• Health hazard: causes detectable impairment of the health of the exposed individual or of his or her offspring
![Page 9: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/9.jpg)
What are the exposure limits?• The specified levels according to ICNIRP guidelines for
power density for frequencies 900MHz &1800 MHz are
4.5W/m2 and 9W/m 2 respectively
Threshold Zone Limit when body start feeling the impact
900 mHz 230 W/m2
1800 mHz 460 W/m2
Safe Zone ICNIRP limit
900 mHz 4.5 W/m2
1800 mHz 9.2 W/m2
50 times safety margin exists in ICNIRP
Safe Zone ICNIRP limit
900 mHz 0.45 W/m2
1800 mHz 0.92 W/m2
DOT, Government of India has reduced limits by further 10 times
![Page 10: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/10.jpg)
What are the safe limits for base stations?
• Working at ground level antenna structures –below safe limits
• Stand off distances at the antennas –6 feet around for omni directional antenna. 6 feet in front for directional(panel/sector) antennas. 1 feet in front for directional (integrated) antenna. 1 feet in front for directional (dish, microwave) antenna.
![Page 11: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/11.jpg)
What are the monitoring agencies?
![Page 12: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/12.jpg)
What are the health effects ?
• Only established health effect – increase in traffic accidents when used while driving.
• RF field associated heating not a concern in routine use
![Page 13: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/13.jpg)
What is electromagnetic hypersensitivity?
• A phenomenon where individuals experience adverse health effects while using or being in the vicinity of electric, magnetic or EMF sources & devices
• Sleep disorders, headaches, nervousness, fatigue, depression and concentration difficulties.
• Symptoms real, but not attributable to EMF
Major review of 31 provocation studies Rubin et al 2005
![Page 14: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/14.jpg)
Are there any harmful health effects from living close to base stations ?
• Do not cause cancer
• RF signals from base stations too low to affect health
![Page 15: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/15.jpg)
Are mobile phone safe for children?
• No data to suggest a health hazard
• UK & Sweden: Minimise use or minimise exposure
• More research recommended by WHO
![Page 16: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/16.jpg)
No documented effects on brain cancer, cognition, leukemia, health disturbances, embryonic or fetal development
![Page 17: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/17.jpg)
Do mobiles towers affect birds,
animals, trees?
• No evidence of a significant environmental impact
![Page 18: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/18.jpg)
Can a radiation shield protect us from EMF exposure ?
• Scientific evidence does not indicate any need for shields.
• Hands free devices can reduce exposure by 10 times
![Page 19: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/19.jpg)
Can mobile phones cook eggs and make pop corn?
![Page 20: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/20.jpg)
Can mobile phones cook eggs and make pop corn?
Snopes.com
![Page 21: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/21.jpg)
•Lead•Magnetic fields (ELF)•Metronidazole•Post menopausal HRT•Phenytoin•Progestin only pills•Zidovudine (AZT)
![Page 22: EMF and Health, by Dr. Eshwar Chandra](https://reader033.fdocuments.us/reader033/viewer/2022052322/5583eed9d8b42a33318b48f8/html5/thumbnails/22.jpg)
Conclusion