{
  "ptid_time": "131_S_0123_2015-03-03",
  "img_path": "/data/qiuhui/data/adni/images/131_S_0123/2015-03-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 46,734 mm³, 0.6% below the reference mean. With a Z-score of -0.02 (49.3th percentile), this represents normal volume ; hippocampal volume measures 4,858 mm³, 30.3% below the reference mean. With a Z-score of -2.62 (0.4th percentile), this represents significant atrophy; whole brain volume measures 887,650 mm³, 13.8% below the reference mean. With a Z-score of -1.80 (3.6th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 82.3 years. Gender is Male. Education: 20 years. MMSE: 25.0. MoCA: 22.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.17 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows significant atrophy (Z-score -2.62, 0.4th percentile), which is strongly associated with Alzheimer's pathology. The whole brain volume also indicates moderate atrophy (Z-score -1.80, 3.6th percentile). Despite normal ventricular volume and AV45 (amyloid PET), the cognitive scores (MMSE 25, MoCA 22) suggest mild cognitive impairment, particularly given the hippocampal atrophy.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to normal amyloid PET but strong hippocampal atrophy and borderline cognitive scores)",
  "timestamp": "2025-07-26T15:00:14.047647"
}