PT - JOURNAL ARTICLE AU - Yuni K. Dewaraja AU - Michael Ljungberg AU - Alan J. Green AU - Pat B. Zanzonico AU - Eric C. Frey AU - SNMMI MIRD Committee AU - Wesley E. Bolch AU - A. Bertrand Brill AU - Mark Dunphy AU - Darrell R. Fisher AU - Roger W. Howell AU - Ruby F. Meredith AU - George Sgouros AU - Barry W. Wessels TI - MIRD Pamphlet No. 24: Guidelines for Quantitative <sup>131</sup>I SPECT in Dosimetry Applications AID - 10.2967/jnumed.113.122390 DP - 2013 Dec 01 TA - Journal of Nuclear Medicine PG - 2182--2188 VI - 54 IP - 12 4099 - http://jnm.snmjournals.org/content/54/12/2182.short 4100 - http://jnm.snmjournals.org/content/54/12/2182.full SO - J Nucl Med2013 Dec 01; 54 AB - The reliability of radiation dose estimates in internal radionuclide therapy is directly related to the accuracy of activity estimates obtained at each imaging time point. The recently published MIRD pamphlet no. 23 provided a general overview of quantitative SPECT imaging for dosimetry. The present document is the first in a series of isotope-specific guidelines that will follow MIRD 23 and focuses on one of the most commonly used therapeutic radionuclides, 131I. The purpose of this document is to provide guidance on the development of protocols for quantitative 131I SPECT in radionuclide therapy applications that require regional (normal organs, lesions) and 3-dimensional dosimetry.