For the past some time, Aarti had been observing some erratic body movement, unsteadiness and lack of coordination in the activities of her sister Radha, who also used to complain of severe headache occasionally. Aarti suggested to her parents to get a medical check-up of Radha. The doctor thoroughly examined Radha and diagnosed that she has a brain tumor. 

(a) What, according to you, are the values displayed by Aarti?

(b) How can radioisotopes help a doctor to diagnose brain tumor?

a) Aarti has incessantly displayed care towards the health of her sister. She has been a keen observer and concerned for others.

b) Using a radio-isotope, a doctor can understand the movement of a normal brain and a brain having tumor in it. A radio-isotope is made to enter the body along with the elements and a compound, whose absorption, functioning and distribution to the brain is studied. The isotope emits radiation and these radiations are detected for absorption and function of the compounds. So, a doctor can diagnose the brain tumor.