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Total body irradiation when the source of radiation is horizontal on the patient (phantom)…….… | ||
| Kerbala Journal of Medicine | ||
| Article 25, Volume 2, Issue 5, 2009, Pages 737-744 PDF (0 K) | ||
| Author | ||
| Fatihiya F. Hasan | ||
| Abstract | ||
| background: Medically administered total-body irradiation, (also known as whole- body radiation), involves the use of external radiation sources that produce penetrating rays of energy to deliver a relatively uniform amount of radiation to the entire body. TBI can be done any for to suppress the patient’s immune system and prevent rejection of donor-bone marrow after a bone marrow transplant using donor marrow (from some one other than the patient). Objective: using new technique for body irradiation to serve total body irradiation (TBI) (the radiation will be covered the whole body) and detect time and dose of required exposure by using a phantom (it is a material like a human tissue), When The source of radiation was used in horizontal position on the phantom. Materials & Methods: The source of radiation, obtained from 60Co available in Hospital of Radiotherapy and Nuclear Medicine in Baghdad. Thimble Chamber: It is an instrument employed in measurement of the ionizing radiation. Phantom: Data on dose distribution are almost entirely derived from measurements in phantoms (tissue equivalent materials) Results: This technique is easily applied with less expenditure and the radiation will be covered the whole body, but here because of large distance between the patient and source of radiation, the dose rate is small so we need more time to give the prescribed dose. The max. Field size of radiation that we get is (150cm x 150 cm) and because the average length of Iraqi adult is 170 cm, therefore the patient should bend his knee in order to be totally within the field size. Conclusion: Recommend for future study on (Gamma – Ray in horizontal position) which might be more effective than vertical position in case, they use (acceleration device) that device will increase dose rate which result to reduce time of exposure to radiation. | ||
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