Method of establishing the optimal radiation dose for radiopharm

Drug – bio-affecting and body treating compositions – Radionuclide or intended radionuclide containing; adjuvant... – Attached to antibody or antibody fragment or immunoglobulin;...

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424 111, 128659, 604 20, A61K 5110, A61B 600, A61N 130

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active

060225211

ABSTRACT:
A method for determining the number of millicuries to be administered to a patient as a dose so as to establish a given centigray (cGy) dose to either the patient's lean body or the patient's total body. The method includes the steps of injecting a radioactive tracer into a patient, determining radiation levels in the whole body, calculating a geometric mean based on the radiation levels, determining the percent-injected activity remaining in the body at each time point, plotting the percent-injected activity versus calculated time from infusion on a log-linear graph, determining the effective half live and the rate of clearance from the log-linear graph, cross-indexing the effective half-life value with the patient's body weight, and multiplying the determined amount of therapeutic millicuries per centigray by the amount of desired centigray to be administered.

REFERENCES:
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"Importance of the Terminal Portion of Tumor Time-Activity Curve in Determining Tumor Dosimetry in Radioimmunotherapy", The Journal of Nuclear Medicine, vol. 32, No. 6, Jun. 1991, pp. 1314-1315.
Kaminski et alia, "Imaging, Dosimetry, and Radioimmunotherapy with Iodine 131-Labeled Anti-CD37 Antibody in B-Cell Lymphoma", Journal of Clinical Oncology, vol. 10, No. 11, Nov. 1992, pp. 1696-1711.
Zasadny et alia, "Standardized Uptake Values of Normal Tissues at Pet with 2-[Fluorine-18]-Fluoro-2-Deoxy-D-Glucose: Variations with Body Weight and a Method for Correction", Radiology, Dec. 1993, pp. 847-850.
Kaminski et alia, "Radioimmunotherapy of B-Cell Lymphoma with [.sup.131 l]Anti-B1 (Anti-CD20) Antibody", The New England Journal of Medicine, Aug. 12, 1993, pp. 459-465.
Koral et alia, "CT-Spect Fusion Plus Conjugate Views for Determining Dosimetry in Iodine-131-Monoclonal Antibody Therapy of Lymphoma Patients", The Journal of Nuclear Medicine, vol. 35, No. 10, Oct. 1994, pp. 1714-1720.
K.R. Zasadny et alia, Abstract for "Correlation of Dosimetric Parameters with Hematological Toxicity after Radioimmunotherapy of Non-Hodgkin's Lymphoma with I-131 Anti-B1. Utility of a New Parameter: Total Body Dose-Lean", The Journal of Nuclear Medicine, vol., 36, No. 5, May 1995, Abstract Book.

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