64 Cu-/ 177 Lu-Cetuximab Theranostic Pair: May the Single 64 Cu-Cetuximab Diagnostic Scan Be Acquired at Any Time After Injection?

Autor: Laffon E; CHU de Bordeaux, Bordeaux, France.; Centre de Recherche Cardio-Thoracique de Bordeaux, Université de Bordeaux, Bordeaux, France., Marthan R; CHU de Bordeaux, Bordeaux, France.; Centre de Recherche Cardio-Thoracique de Bordeaux, Université de Bordeaux, Bordeaux, France.; INSERM U-1045, Centre de Recherche Cardio-Thoracique de Bordeaux, Bordeaux, France.
Jazyk: angličtina
Zdroj: Cancer biotherapy & radiopharmaceuticals [Cancer Biother Radiopharm] 2023 Feb; Vol. 38 (1), pp. 74-76. Date of Electronic Publication: 2022 Oct 10.
DOI: 10.1089/cbr.2022.0046
Abstrakt: Two independent equations were recently proposed for estimating 177 Lu-cetuximab cumulative activity, in a preclinical situation, from an initial 64 Cu-cetuximab diagnostic scan acquired at peak time of decay-uncorrected ( t peak-uncorr ) or decay-corrected ( t peak-corr ) time-activity curve of trapped 64 Cu-cetuximab, respectively. The standard uptake ratio (SUR) measured at t peak-uncorr or t peak-corr turned out to be a key metric in each equation, respectively. However, acquiring the diagnostic scan at t peak-uncorr or t peak-corr might be a limitation of the proposed method. Therefore, in an attempt to overcome this limitation, this note aims at theoretically investigating whether SUR( t peak-uncorr ) and/or SUR( t peak-corr ) could be derived from a diagnostic scan acquired at any time postinjection.
Databáze: MEDLINE