{
  "ptid_time": "128_S_0225_2007-09-12",
  "img_path": "/data/qiuhui/data/adni/images/128_S_0225/2007-09-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 36,287 mm³, 1.8% below the reference mean. With a Z-score of -0.05 (48.0th percentile), this represents normal volume ; hippocampal volume measures 5,456 mm³, 16.0% below the reference mean. With a Z-score of -1.28 (10.0th percentile), this represents mild atrophy; whole brain volume measures 845,998 mm³, 8.9% below the reference mean. With a Z-score of -1.06 (14.4th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,206 mm³, 7.4% below the reference mean. With a Z-score of -0.40 (34.5th percentile), this represents normal volume ; fusiform gyrus volume measures 13,717 mm³, 14.9% below the reference mean. With a Z-score of -1.12 (13.2th percentile), this represents mild atrophy; middle temporal gyrus volume measures 16,765 mm³, 7.0% below the reference mean. With a Z-score of -0.62 (26.6th percentile), this represents normal volume . ",
  "text_data": "Age is 83.9 years. Gender is Female. Education: 17 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.28, 10th percentile), which is notable given its role in memory and early Alzheimer's pathology. However, other key regions (entorhinal cortex, middle temporal gyrus) are within normal ranges, and the MMSE score of 30 is intact. The absence of APOE4 and preserved cognitive function suggest no significant impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to hippocampal atrophy but no clinical symptoms or other strong biomarkers)",
  "timestamp": "2025-07-26T13:38:25.752272"
}