{
  "ptid_time": "073_S_4739_2013-05-16",
  "img_path": "/data/qiuhui/data/adni/images/073_S_4739/2013-05-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,119 mm³, 36.9% above the reference mean. With a Z-score of 0.88 (81.0th percentile), this represents normal volume ; hippocampal volume measures 7,524 mm³, 6.3% below the reference mean. With a Z-score of -0.63 (26.6th percentile), this represents normal volume ; whole brain volume measures 1,094,340 mm³, 3.5% below the reference mean. With a Z-score of -0.50 (30.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,254 mm³, 0.2% below the reference mean. With a Z-score of -0.01 (49.4th percentile), this represents normal volume ; fusiform gyrus volume measures 17,344 mm³, 12.9% below the reference mean. With a Z-score of -1.07 (14.2th percentile), this represents mild atrophy; middle temporal gyrus volume measures 19,171 mm³, 14.5% below the reference mean. With a Z-score of -1.19 (11.7th percentile), this represents mild atrophy. ",
  "text_data": "Age is 66.2 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild atrophy in the fusiform gyrus and middle temporal gyrus, but all other regions (hippocampus, whole brain, entorhinal cortex) are within normal ranges. Cognitive scores (MMSE 30, MoCA 28) are intact, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild atrophy in some regions could suggest early changes, but cognitive performance remains strong)",
  "timestamp": "2025-07-26T09:51:16.067508"
}