{
  "ptid_time": "137_S_0994_2007-06-05",
  "img_path": "/data/qiuhui/data/adni/images/137_S_0994/2007-06-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 17,903 mm³, 3.9% below the reference mean. With a Z-score of -0.11 (45.6th percentile), this represents normal volume ; hippocampal volume measures 6,585 mm³, 15.7% below the reference mean. With a Z-score of -2.18 (1.5th percentile), this represents significant atrophy; whole brain volume measures 913,416 mm³, 12.2% below the reference mean. With a Z-score of -1.46 (7.2th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,316 mm³, 10.3% below the reference mean. With a Z-score of -0.80 (21.1th percentile), this represents normal volume ; fusiform gyrus volume measures 12,607 mm³, 31.6% below the reference mean. With a Z-score of -2.87 (0.2th percentile), this represents significant atrophy; middle temporal gyrus volume measures 19,348 mm³, 5.8% below the reference mean. With a Z-score of -0.48 (31.7th percentile), this represents normal volume . ",
  "text_data": "Age is 55.6 years. Gender is Female. Education: 18 years. MMSE: 26.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The data shows significant atrophy in the hippocampus and fusiform gyrus, which are key regions affected in Alzheimer's disease. The MMSE score of 26 is borderline, suggesting mild cognitive impairment (MCI), but not yet dementia. The presence of one APOE4 allele increases Alzheimer's risk.  \n\n**Diagnosis:** **MCI** (Mild Cognitive Impairment)  \n**Confidence:** **Medium** (due to borderline MMSE and significant atrophy in AD-related regions, but no clear functional impairment yet)",
  "timestamp": "2025-07-26T16:22:31.036836"
}