Moreover, PET imaging with dual tracers ([18F]AlF-NOTA-QHY-04 and [18F]FDG) in some patients showed that higher uptake of [18F]AlF-NOTA-QHY-04 was observed in certain lesions, particularly in lymphoma patients, implying the CXCR4-targeted PET is more suitable than [18F]FDG PET in the diagnosis of lymphoma. The gene discussed is CXCR4; the disease is lymphoma.