14. Why would isotopes used for cancer treatment not be used for medical imaging

Question

14. Why would isotopes used for cancer treatment not be used for medical imaging?
15. Name three of the five principles for minimizing exposure to ionizing radiation. 16. Which measurement is most useful for detecting harm to personal from radioactive material, the curie, roentgen or rem? 14. Why would isotopes used for cancer treatment not be used for medical imaging?
15. Name three of the five principles for minimizing exposure to ionizing radiation. 16. Which measurement is most useful for detecting harm to personal from radioactive material, the curie, roentgen or rem? 14. Why would isotopes used for cancer treatment not be used for medical imaging?
15. Name three of the five principles for minimizing exposure to ionizing radiation. 16. Which measurement is most useful for detecting harm to personal from radioactive material, the curie, roentgen or rem?

Explanation / Answer

14) Isotopes are used for the cancer therapy, in which high energy radiation is released by the excited chemical that shrink tumours and kill cancer cells. The radioisotopes which includes X ray, Gamma rays and charged particles are mostly used for therapy. Metals like Iodine which is radioactivelly labelled have the potentiality tot ravel in the blood and kills cancer cells.The radiation damages the genetic information and passes through the herediatary which inturn changes into free radical generation.recently 3 dimensional conformal radiation therapy used for the treatment of cancers. Sometimes combination of chemotherapy and radiation therapy is given which is called chemo radaition or radiochemotherapy.

Few radioisotopes therapies used for treatment of cancers is :

Gamma rays and X rays have high penetration power they can travel very long distance so these are used as imaging of bones,muscles where penetration power is also very high, whereas tumour tissue cannot because its associated benign or maligant its impossible whole body to find the cancer..It is used for therapy.

FIVE PRINCIPLES MINIMIZING THE EXPOSURE OF IONIZING RADIATION :-

TIME : It is imporatant factor in which people are exposed to radiation, if minimising the exposure time reduces the dose from the radaition source.

DISTANCE : Dose of radaition increases with increase in distance from the source

SHIELDING :- Proper shielding material is between the person and radiation minimize the exposure of radiation.

CONTAINMENT : the usage should also with closed chamber., periodical monitoring

PROTECTION :- Dose limiting for radiation workers protection is very important for this exposure.

Peridical monitoring of labelling materials, posting and reporting about materials.

16) Rem is so ahrm for personal because it termed as equivalent of radiation dose, IU units are sievert. It energy absorbed by human tissues and damages the tissue.

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