Trop-2 Targeted PET Probes in Advanced TNBC

After enrollment, before subjects receive TROP-2 ADC treatment, after 2 cycles of treatment, and at the time of progression, in these three phases, subjects will undergo 89Zr-DFO-hSR7 and 18F-FDG examinations once respectively (subjects will first undergo the 18F-FDG examination, and then the 89Zr-DFO-hSR7 examination within 1 week).