{
  "ptid_time": "133_S_0771_2007-10-11",
  "img_path": "/data/qiuhui/data/adni/images/133_S_0771/2007-10-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,270 mm³, 36.3% above the reference mean. With a Z-score of 0.83 (79.7th percentile), this represents normal volume ; hippocampal volume measures 6,321 mm³, 11.2% below the reference mean. With a Z-score of -1.02 (15.3th percentile), this represents mild atrophy; whole brain volume measures 967,080 mm³, 0.8% below the reference mean. With a Z-score of -0.10 (46.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,391 mm³, 7.7% below the reference mean. With a Z-score of -0.47 (31.9th percentile), this represents normal volume ; fusiform gyrus volume measures 15,937 mm³, 6.3% below the reference mean. With a Z-score of -0.58 (28.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,094 mm³, 5.6% below the reference mean. With a Z-score of -0.49 (31.3th percentile), this represents normal volume . ",
  "text_data": "Age is 75.1 years. Gender is Female. Education: 19 years. MMSE: 29.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.02, 15.3th percentile), while other brain regions (ventricular, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. The MMSE score of 29 is intact, and there is no APOE4 genetic risk factor.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Hippocampal atrophy suggests early neurodegeneration, but preserved cognition and lack of APOE4 make progression to dementia less certain.)",
  "timestamp": "2025-07-26T15:25:55.556986"
}