{
  "ptid_time": "067_S_0828_2006-11-09",
  "img_path": "/data/qiuhui/data/adni/images/067_S_0828/2006-11-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,088 mm³, 35.6% below the reference mean. With a Z-score of -0.81 (20.8th percentile), this represents normal volume ; hippocampal volume measures 4,431 mm³, 37.7% below the reference mean. With a Z-score of -3.46 (0.0th percentile), this represents profound atrophy; whole brain volume measures 834,853 mm³, 14.3% below the reference mean. With a Z-score of -1.81 (3.5th percentile), this represents moderate atrophy; entorhinal cortex volume measures 1,797 mm³, 51.1% below the reference mean. With a Z-score of -3.13 (0.1th percentile), this represents profound atrophy; fusiform gyrus volume measures 11,777 mm³, 30.8% below the reference mean. With a Z-score of -2.80 (0.3th percentile), this represents significant atrophy; middle temporal gyrus volume measures 16,796 mm³, 12.4% below the reference mean. With a Z-score of -1.07 (14.1th percentile), this represents mild atrophy. ",
  "text_data": "Age is 77.4 years. Gender is Female. Education: 16 years. MMSE: 21.0. Logical Memory: 0.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows profound atrophy in the hippocampus and entorhinal cortex, which are key regions affected in Alzheimer's disease (AD). The MMSE score of 21 indicates cognitive impairment, and the presence of one APOE4 allele increases AD risk.  \n\n**Diagnosis:** **Dementia (likely Alzheimer’s disease)**  \n**Confidence:** **High**",
  "timestamp": "2025-07-26T08:31:46.531078"
}