{
  "ptid_time": "094_S_1267_2010-03-18",
  "img_path": "/data/qiuhui/data/adni/images/094_S_1267/2010-03-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 20,820 mm³, 45.9% below the reference mean. With a Z-score of -1.10 (13.6th percentile), this represents mild atrophy; hippocampal volume measures 8,622 mm³, 14.1% above the reference mean. With a Z-score of 1.37 (91.5th percentile), this represents mild enlargement; whole brain volume measures 1,185,480 mm³, 9.8% above the reference mean. With a Z-score of 1.28 (89.9th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,003 mm³, 2.4% below the reference mean. With a Z-score of -0.16 (43.6th percentile), this represents normal volume ; fusiform gyrus volume measures 18,629 mm³, 1.1% below the reference mean. With a Z-score of -0.09 (46.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,052 mm³, 3.3% above the reference mean. With a Z-score of 0.30 (61.8th percentile), this represents normal volume . ",
  "text_data": "Age is 76.2 years. Gender is Male. Education: 16 years. MMSE: 30.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal to mildly enlarged volumes in key regions (hippocampus, whole brain). The MMSE score of 30 is intact, and there is no APOE4 risk allele. No significant atrophy is seen in Alzheimer’s-vulnerable regions (entorhinal cortex, fusiform gyrus).  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T10:20:46.995072"
}