Posted by 
Lying face down called prone radiation, to receive radiation therapy to the breast area reduces the amount of radiation that reaches the heart and lungs and protects them from damage.
When patients receive radiotherapy from X-ray radiation which destroys cancer cells, the radiation may destroy lungs and the heart if the patient lie on her back, lying on face protects and exempts the heart and lungs from the radiation.
Treatments that prevent or reduce the heart and lungs from radiation are very important to prevents heart and lungs damage. Prone radiotherapy makes it easy to treat large breast without heart and lungs damage.
Arthritis patients or those suffering from back pain may not be able to benefit from this method, women who are not comfortable lying on their stomach for a long period of time may not use prone radiation.
haleplushearty.blogspot.com