{
  "ptid_time": "023_S_0126_2006-08-08",
  "img_path": "/data/qiuhui/data/adni/images/023_S_0126/2006-08-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 35,992 mm³, 28.2% above the reference mean. With a Z-score of 0.65 (74.1th percentile), this represents normal volume ; hippocampal volume measures 4,898 mm³, 31.2% below the reference mean. With a Z-score of -2.86 (0.2th percentile), this represents significant atrophy; whole brain volume measures 902,934 mm³, 7.4% below the reference mean. With a Z-score of -0.93 (17.7th percentile), this represents normal volume ; entorhinal cortex volume measures 2,234 mm³, 39.2% below the reference mean. With a Z-score of -2.40 (0.8th percentile), this represents significant atrophy; fusiform gyrus volume measures 12,051 mm³, 29.2% below the reference mean. With a Z-score of -2.65 (0.4th percentile), this represents significant atrophy; middle temporal gyrus volume measures 15,194 mm³, 20.7% below the reference mean. With a Z-score of -1.80 (3.6th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 78.0 years. Gender is Female. Education: 14 years. MMSE: 24.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows significant atrophy in the hippocampus, entorhinal cortex, and fusiform gyrus—key regions affected in Alzheimer's disease. The MMSE score of 24 suggests mild cognitive impairment, and the presence of one APOE4 allele increases Alzheimer's risk.  \n\n**Diagnosis:** **Dementia (likely Alzheimer’s disease)**  \n**Confidence:** **High**",
  "timestamp": "2025-07-26T02:36:25.092391"
}