title: Fitting of radioactivity data to exponential functions by weighted least squares analysis.
abstract: The weighted least squares analysis ( WLS ) was compared with the commonly used least squares analysis in the fitting of radioactivity data to an exponential equation. The results show that the two methods present the same accuracy in estimating the parameters of exponential functions, while the WLS analysis offers a much higher reliability, permitting a considerable shortening of the sample counting time.
mesh_terms: D006801:Humans; D011868:Radioisotopes; D012711:Serum Albumin, Radio-Iodinated / Q000378:metabolism; D013223:Statistics as Topic
chemical_list: D011868:Radioisotopes; D012711:Serum Albumin, Radio-Iodinated