Clinical Evaluation of [68Ga]Ga-ELI411 PET Imaging in Adult Patients With Solid Tumors

Inclusion Criteria: * Written informed consent obtained prior to the performance of any study-specific procedures. * Adults aged 18 years or older. * Histologically, cytologically, or clinically confirmed malignant solid tumor. * Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1. * Clinical indication for \^18F-FDG PET imaging. * No clinically significant abnormalities in physical examination, vital signs, laboratory tests, or 12-lead electrocardiogram that, in the investigator's judgment, would interfere with study participation or image interpretation. * Women of childbearing potential must have a negative pregnancy test prior to administration of the investigational radiotracer. * Participants of childbearing potential (male and female) must agree to use highly effective contraception during the study and for at least 6 months after administration of the investigational radiotracer, and must refrain from sperm or oocyte donation during this period. * Willing and able to comply with all study procedures and follow-up requirements. Exclusion Criteria: * Any concomitant disease or medical condition that, in the investigator's judgment, could compromise participant safety or interfere with image interpretation. * Concomitant medications or therapies that may affect the safety, biodistribution, radiation dosimetry, or diagnostic performance of the investigational radiotracer. * Previous anticancer treatment (including chemotherapy, radiotherapy, immunotherapy, targeted therapy, radionuclide therapy, or major surgery) without an adequate washout period, as determined by the investigator. * Known hypersensitivity to gallium-containing radiopharmaceuticals, ethanol, any component of the investigational product, or a history of severe allergic reactions. * Pregnant or breastfeeding women. * Inability to undergo PET/CT imaging or comply with study procedures. Participation in another interventional clinical trial that, in the investigator's judgment, could interfere with this study. * Any other condition that, in the investigator's judgment, makes the participant unsuitable for participation in this study.