{
  "ptid_time": "073_S_4825_2013-03-26",
  "img_path": "/data/qiuhui/data/adni/images/073_S_4825/2013-03-26/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,733 mm³, 43.6% below the reference mean. With a Z-score of -1.04 (14.8th percentile), this represents mild atrophy; hippocampal volume measures 9,284 mm³, 22.8% above the reference mean. With a Z-score of 2.23 (98.7th percentile), this represents significant enlargement; whole brain volume measures 1,187,370 mm³, 10.0% above the reference mean. With a Z-score of 1.30 (90.3th percentile), this represents mild enlargement; entorhinal cortex volume measures 4,434 mm³, 8.1% above the reference mean. With a Z-score of 0.55 (70.9th percentile), this represents normal volume ; fusiform gyrus volume measures 21,581 mm³, 14.6% above the reference mean. With a Z-score of 1.24 (89.3th percentile), this represents mild enlargement; middle temporal gyrus volume measures 23,640 mm³, 10.8% above the reference mean. With a Z-score of 0.97 (83.4th percentile), this represents normal volume . ",
  "text_data": "Age is 72.4 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular atrophy but otherwise normal-to-enlarged volumes in key regions (hippocampus, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 30, MoCA 26) are within normal limits, and the absence of APOE4 reduces genetic risk. No significant atrophy or cognitive impairment is evident.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild ventricular atrophy, but cognitive scores and other volumes are reassuring)",
  "timestamp": "2025-07-26T09:53:26.871046"
}