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found;\n* There were no known peripheral or central venous problems;\n* 68Ga PSMA PET \u002F CT imaging can be performed within 6 weeks after the diagnosis of renal cell carcinoma;\n* Signed the informed consent form of voluntary participation in clinical trials.\n\nExclusion Criteria:\n\n* Age ≤ 18 years old;\n* Can't stand lying flat in PET \u002F CT examination;\n* There are contraindications for 68Ga PSMA ligands;\n* In the past two years, there was a history of other malignant tumors, or according to the doctor's research judgment, complications may occur and affect the normal operation of the test;\n* Renal function is impaired or hemodialysis is in progress.","ALL","18 Years","90 Years",{"count":164,"type":165},300,"ESTIMATED","INTERVENTIONAL",[168],"NA","The primary research purpose is to evaluate the diagnostic efficacy of 68Ga-PSMA PET in metastatic lesions of locally advanced and advanced renal cell carcinoma, and to compare with that of enhanced CT. 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