{
  "ptid_time": "035_S_0292_2009-04-09",
  "img_path": "/data/qiuhui/data/adni/images/035_S_0292/2009-04-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 47,199 mm³, 22.5% above the reference mean. With a Z-score of 0.54 (70.5th percentile), this represents normal volume ; hippocampal volume measures 5,147 mm³, 31.9% below the reference mean. With a Z-score of -3.11 (0.1th percentile), this represents profound atrophy; whole brain volume measures 1,021,520 mm³, 5.4% below the reference mean. With a Z-score of -0.70 (24.3th percentile), this represents normal volume ; entorhinal cortex volume measures 2,238 mm³, 45.4% below the reference mean. With a Z-score of -3.08 (0.1th percentile), this represents profound atrophy; fusiform gyrus volume measures 17,312 mm³, 8.1% below the reference mean. With a Z-score of -0.69 (24.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,128 mm³, 15.0% below the reference mean. With a Z-score of -1.35 (8.8th percentile), this represents mild atrophy. ",
  "text_data": "Age is 79.4 years. Gender is Male. Education: 16 years. MMSE: 22.0. Logical Memory: 1.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The data shows profound atrophy in the hippocampus and entorhinal cortex (both at the 0.1th percentile), which are key regions affected in Alzheimer’s disease. The MMSE score of 22 suggests cognitive impairment, but the absence of APOE4 and normal whole-brain volume temper the certainty.  \n\n**Diagnosis:** **Dementia (likely Alzheimer’s subtype)**  \n**Confidence:** **Medium** (due to strong hippocampal/entorhinal atrophy but lack of APOE4 and preserved global brain volume)",
  "timestamp": "2025-07-26T05:46:10.633728"
}