{
  "ptid_time": "014_S_0558_2007-07-19",
  "img_path": "/data/qiuhui/data/adni/images/014_S_0558/2007-07-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 49,571 mm³, 5.4% above the reference mean. With a Z-score of 0.16 (56.3th percentile), this represents normal volume ; hippocampal volume measures 6,063 mm³, 13.0% below the reference mean. With a Z-score of -1.12 (13.1th percentile), this represents mild atrophy; whole brain volume measures 1,048,080 mm³, 1.8% above the reference mean. With a Z-score of 0.24 (59.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,960 mm³, 0.2% below the reference mean. With a Z-score of -0.01 (49.4th percentile), this represents normal volume ; fusiform gyrus volume measures 19,420 mm³, 7.5% above the reference mean. With a Z-score of 0.65 (74.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,736 mm³, 7.1% below the reference mean. With a Z-score of -0.64 (26.2th percentile), this represents normal volume . ",
  "text_data": "Age is 80.8 years. Gender is Male. Education: 19 years. MMSE: 29.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (13% below reference mean, Z-score -1.12), which is notable given the otherwise normal brain volumes (ventricular, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus). However, the MMSE score of 29 is within the normal range, and there is no APOE4 risk allele.  \n**Diagnosis:** **MCI (Mild Cognitive Impairment)**  \n**Confidence:** **Medium** (Hippocampal atrophy suggests early neurodegeneration, but preserved cognition and lack of APOE4 reduce certainty.)",
  "timestamp": "2025-07-25T23:44:20.518458"
}