This is a prospective, interventional clinical pilot study that recruited 10 normal volunteers who underwent 68Ga-Pentikra PET/CT imaging to evaluate the safety, biodistribution and radiation dosimetry of 68Ga-Pentikra in normal volunteers.

Inclusion Criteria:

• 1) Age: 18 ~ 60 years old (including boundary values); 2) Gender: male or female; 3) Body weight: males weighing ≥50kg, females weighing ≥45kg, and body mass index [BMI = weight (kg)/height 2 (m2)] within the range of 19.0 ~ 26.0kg/m2 (including boundary values); (4) Subjects can fully understand and voluntarily participate in this experiment, and sign the informed consent form.

Exclusion Criteria:

- 1) Minors, pregnant women, lactating women, and those with severe hepatic or renal insufficiency (alanine aminotransferase exceeding the upper limit of normal values by 8-10 times and serum creatinine of 186-442 umol/L).

2) Previous history of tumour and surgery; 3) Other conditions judged by the investigator to be unsuitable as study subjects .