{
  "ptid_time": "006_S_4357_2012-06-19",
  "img_path": "/data/qiuhui/data/adni/images/006_S_4357/2012-06-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 12,880 mm³, 54.1% below the reference mean. With a Z-score of -1.24 (10.8th percentile), this represents mild atrophy; hippocampal volume measures 7,740 mm³, 8.8% above the reference mean. With a Z-score of 0.81 (79.0th percentile), this represents normal volume ; whole brain volume measures 926,300 mm³, 5.0% below the reference mean. With a Z-score of -0.62 (26.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,424 mm³, 6.8% below the reference mean. With a Z-score of -0.42 (33.9th percentile), this represents normal volume ; fusiform gyrus volume measures 17,170 mm³, 0.9% above the reference mean. With a Z-score of 0.08 (53.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,726 mm³, 12.7% below the reference mean. With a Z-score of -1.11 (13.4th percentile), this represents mild atrophy. ",
  "text_data": "Age is 74.2 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the ventricles and middle temporal gyrus, but hippocampal and other key volumes are within normal ranges. Cognitive scores (MMSE 30, MoCA 28) are intact, and there is no APOE4 risk allele.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **High**",
  "timestamp": "2025-07-25T21:36:47.845613"
}