{
  "ptid_time": "027_S_5093_2018-12-19",
  "img_path": "/data/qiuhui/data/adni/images/027_S_5093/2018-12-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,850 mm³, 18.6% below the reference mean. With a Z-score of -0.43 (33.5th percentile), this represents normal volume ; hippocampal volume measures 6,149 mm³, 13.6% below the reference mean. With a Z-score of -1.25 (10.7th percentile), this represents mild atrophy; whole brain volume measures 1,013,220 mm³, 4.0% above the reference mean. With a Z-score of 0.50 (69.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,508 mm³, 4.5% below the reference mean. With a Z-score of -0.28 (39.1th percentile), this represents normal volume ; fusiform gyrus volume measures 17,346 mm³, 2.0% above the reference mean. With a Z-score of 0.18 (57.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,658 mm³, 18.2% above the reference mean. With a Z-score of 1.58 (94.3th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 74.8 years. Gender is Female. Education: 19 years. MMSE: 29.0. MoCA: 26.0. Logical Memory: 23.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.25, 10.7th percentile), which is a key biomarker for Alzheimer's pathology, while other brain regions are within normal ranges. Cognitive scores (MMSE 29, MoCA 26) are borderline for MCI but still relatively preserved. No APOE4 allele is present, reducing genetic risk.  \n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to hippocampal atrophy but preserved cognition and lack of APOE4)",
  "timestamp": "2025-07-26T04:07:46.986752"
}