Q-14. All isotopes are used for thyroid except: (PGI 02)
a) I-131
b) I-123
c) I-122
d) I-125
e) I-129
Answer: c, d and e
Explanation:
Thyroid scan:
I-123: Radiotracer of choice for functional evaluation of thyroid
I-131: Most favored for therapeutic purpose
Important point:
99Tc Pertechnetate most commonly used for imaging