Application of Quantum Detection-Driven Artificial Intelligence Algorithms for Single-Molecule cfDNA Characterization in the Early Diagnosis of Prostate Cancer

Inclusion Criteria: 1. Male, aged 18-80 years; 2. PSA \> 4 ng/ml; 3. Patients meeting criteria for prostate biopsy: * fPSA/PSA \< 0.16 or PSA D \> 0.15 or PSA V \> 0.75; ② Positive digital rectal examination (DRE); ③ Imaging studies (ultrasound/MRI) showing suspicious lesions. Exclusion Criteria: 1. Patients diagnosed with any malignant tumour within the past five years; 2. Patients who have undergone transurethral resection or enucleation of the prostate; 3. Patients who have previously received treatment for prostate cancer, including but not limited to endocrine therapy, targeted therapy, or immunotherapy; 4. Patients on long-term anticoagulant or antiplatelet therapy (anticoagulants discontinued for less than one week); 5. Patients who have received any form of tumour treatment prior to enrolment blood sampling, including surgery, radiotherapy/chemotherapy, endocrine therapy, targeted therapy, or immunotherapy; 6. Concurrent severe systemic diseases deemed by the investigator likely to interfere with trial treatment, evaluation, or compliance, including serious respiratory, circulatory, neurological, psychiatric, gastrointestinal, endocrine, immunological, or urological disorders; 7. Organ transplant recipients or individuals with prior non-autologous (allogeneic) bone marrow or stem cell transplantation; 8. Subjects who have undergone blood transfusion within one month prior to blood sampling; 9. Patients currently participating in other clinical trials, or who have participated in other clinical trials within the past year; 10. Patients deemed unsuitable for this clinical trial by the investigator; 11. Patients meeting any of the above criteria shall not be eligible for inclusion as subjects.