This is an open-label positron emission tomography/computed tomography (PET/CT) study to investigate the clinical predictive value of 68Ga-DOTA-BPP in subjects with triple-negative breast cancer. The visual and semiquantitative methods will be used to assess the PET/CT images

ACE is expressed in triple-negative breast cancer cells. This project develops new type of 68GA-labeled DOTA-BPP, leveraging the inherent strengths of this nuclear medicine discipline, promoted the formulation of the production of this drug To obtain 68Ga-DOTA-BPP injection that can be used in preclinical studies and meets clinical standards. Join a group In clinical patients, 68Ga-DOTA-BPP PET/CT imaging of patients with ACE-positive TNBC was performed, and ACE was obtained To provide evidence for patient screening and efficacy evaluation before targeted therapy with high expression of TNBC, and preliminatively evaluate the level of ACE against high level of ACE. The effect of tumor development can provide a practical basis for the establishment of ACE-targeted PET imaging platform

Inclusion Criteria:

1. 18-75 years old;
2. ECOG score 0 or 1 point;
3. Participants with confirmed TNBC cancer who are suggested by the clinicians to conduct PET/CT imaging for tumor diagnosis or staging.

Exclusion Criteria:

1. Pregnant or nursing;
2. Severe hepatic or renal dysfunction;
3. Low WBC (less than 3 x 10^9/L);
4. Unable to comply with the PET/CT imaging procedures

Patients at Being Cancer Hospital who are confirmed TNBC.