{
  "ptid_time": "003_S_4350_2012-12-06",
  "img_path": "/data/qiuhui/data/adni/images/003_S_4350/2012-12-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,400 mm³, 60.0% below the reference mean. With a Z-score of -1.44 (7.5th percentile), this represents mild atrophy; hippocampal volume measures 8,546 mm³, 13.1% above the reference mean. With a Z-score of 1.27 (89.9th percentile), this represents mild enlargement; whole brain volume measures 1,146,180 mm³, 6.2% above the reference mean. With a Z-score of 0.80 (78.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,144 mm³, 1.1% above the reference mean. With a Z-score of 0.07 (52.9th percentile), this represents normal volume ; fusiform gyrus volume measures 21,932 mm³, 16.4% above the reference mean. With a Z-score of 1.40 (91.9th percentile), this represents mild enlargement; middle temporal gyrus volume measures 24,942 mm³, 16.9% above the reference mean. With a Z-score of 1.52 (93.5th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 73.9 years. Gender is Male. Education: 13 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal-to-enlarged volumes in key regions (hippocampus, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 30, MoCA 28) are intact, and there is no APOE4 risk allele. No significant atrophy is seen in Alzheimer’s-vulnerable regions (e.g., hippocampus, entorhinal cortex).  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T20:52:05.056082"
}