• Patients with adrenal masses suspected to be aldosterone-producing adenomas based on routine imaging (e.g., CT scans), or clinically diagnosed primary aldosteronism patients requiring subtyping

• Signed written informed consent, with willingness and ability to comply with study procedures.

• Female participants must be surgically sterilized or postmenopausal for over a year; if not, reliable contraception is required.

• Male participants must use reliable contraception during the study and refrain from sperm donation.