{
  "ptid_time": "137_S_4536_2017-11-02",
  "img_path": "/data/qiuhui/data/adni/images/137_S_4536/2017-11-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 43,754 mm³, 18.4% above the reference mean. With a Z-score of 0.50 (69.0th percentile), this represents normal volume ; hippocampal volume measures 5,504 mm³, 15.3% below the reference mean. With a Z-score of -1.22 (11.1th percentile), this represents mild atrophy; whole brain volume measures 988,029 mm³, 6.4% above the reference mean. With a Z-score of 0.77 (78.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,295 mm³, 4.8% below the reference mean. With a Z-score of -0.26 (39.7th percentile), this represents normal volume ; fusiform gyrus volume measures 16,708 mm³, 3.7% above the reference mean. With a Z-score of 0.28 (61.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 15,896 mm³, 11.8% below the reference mean. With a Z-score of -1.05 (14.6th percentile), this represents mild atrophy. ",
  "text_data": "Age is 83.4 years. Gender is Female. Education: 17 years. MMSE: 25.0. MoCA: 23.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.08 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.22, 11.1th percentile), and the middle temporal gyrus also exhibits mild atrophy (Z-score -1.05, 14.6th percentile). Cognitive scores (MMSE 25, MoCA 23) are slightly below normal for age, but not severely impaired. No significant amyloid pathology (AV45 normal) and no APOE4 risk allele.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Cognitive scores suggest mild decline, and hippocampal/middle temporal atrophy supports MCI, but lack of amyloid burden and APOE4 reduces certainty for Alzheimer’s pathology.)",
  "timestamp": "2025-07-26T16:35:55.866822"
}