DeGrossi, 0., Gotta, H., Olivari,A., Pecorini, V., Chwojnik, A. Possibilities of using Tc99M in place of radioiodine in thyroid function studies. 11. Nuclearmed. 4: 383-390, 1965. Massin, J.P., Karam, J., Savoie, J.C. Comparison du technetium 99m et de l’iode 131 en scintigraphie thyroidienne. Annales d'‘Endocrin. 31: 962-968, 1970 12. Steinberg, M., Cavalieri, R.R., Choy, S.H. Uptake of technetium-99- pertechnetate in a primary thyroid carcincoma: evaluating nodules. 13. need for caution in J. Clin. Endocr, and Metab. 31: 81-84, 1970 Strauss, H.W., Hurley, P.J., Wagner, H.N. Jr. Advantages of 99m pertechnetate for thyroid scanning in patients with decreased radioiodine uptake. 14. Radiology 97: 307-310, 1970 dos Remedios, L.V., Weber, P.M., Jasko, I.A. Thyroid scintigraphy in 1000 patients: rational use of 99m7- and 11yz compounds. 12: 673-677, 1971. 15. J. Nucl. Med. . Atkins, H.L., Klopper, J.F., Lambrecht, R. Wolf, A. 99M@re and 123; iy thyroid imaging. A comparison of Am. J. Roentgenol; Radium Ther. and Nucl. Med. 117; 195-201, 1973 16. Usher, M.S., Arzoumanian, A.Y. Thyroid nodule scans made with pertechnetate and iodine may give inconsistent results. J. Nucl. Med. 12: 137-138, 1971. 17. Myers, W. Radioiodine-123 for scanning. 18. Goolden A., Glass H., Silvester, D. J. Nucl. Med. 7: 390, 1966. The choice of a radioactive isotope for the investigation of thyroid disorders. 41:20-25,, 1968. 5001363 Brit. J. Radiol.