{
  "ptid_time": "036_S_4389_2012-07-09",
  "img_path": "/data/qiuhui/data/adni/images/036_S_4389/2012-07-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,138 mm³, 33.8% below the reference mean. With a Z-score of -0.98 (16.3th percentile), this represents normal volume ; hippocampal volume measures 8,581 mm³, 23.1% above the reference mean. With a Z-score of 2.00 (97.7th percentile), this represents significant enlargement; whole brain volume measures 1,212,710 mm³, 17.8% above the reference mean. With a Z-score of 2.34 (99.0th percentile), this represents significant enlargement; entorhinal cortex volume measures 4,291 mm³, 8.1% above the reference mean. With a Z-score of 0.53 (70.2th percentile), this represents normal volume ; fusiform gyrus volume measures 22,194 mm³, 22.9% above the reference mean. With a Z-score of 1.98 (97.6th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 22,678 mm³, 12.4% above the reference mean. With a Z-score of 1.11 (86.7th percentile), this represents mild enlargement. ",
  "text_data": "Age is 81.6 years. Gender is Male. Education: 18 years. MMSE: 28.0. MoCA: 24.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows significant enlargement in hippocampal, whole brain, fusiform gyrus, and mild enlargement in the middle temporal gyrus, with normal ventricular and entorhinal cortex volumes. Cognitive scores (MMSE 28, MoCA 24) are within normal to mild cognitive impairment range, and the absence of APOE4 reduces genetic risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to the unusual pattern of brain enlargement, but cognitive scores support normal function)",
  "timestamp": "2025-07-26T06:12:38.751080"
}