{
  "ptid_time": "041_S_0549_2007-04-05",
  "img_path": "/data/qiuhui/data/adni/images/041_S_0549/2007-04-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 16,939 mm³, 43.6% below the reference mean. With a Z-score of -1.04 (15.0th percentile), this represents mild atrophy; hippocampal volume measures 7,169 mm³, 10.7% below the reference mean. With a Z-score of -1.07 (14.3th percentile), this represents mild atrophy; whole brain volume measures 1,030,970 mm³, 9.1% below the reference mean. With a Z-score of -1.29 (9.8th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,985 mm³, 6.5% below the reference mean. With a Z-score of -0.45 (32.6th percentile), this represents normal volume ; fusiform gyrus volume measures 16,568 mm³, 16.8% below the reference mean. With a Z-score of -1.40 (8.1th percentile), this represents mild atrophy; middle temporal gyrus volume measures 17,605 mm³, 21.4% below the reference mean. With a Z-score of -1.77 (3.9th percentile), this represents moderate atrophy. ",
  "text_data": "Age is 69.2 years. Gender is Male. Education: 14 years. MMSE: 22.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild to moderate atrophy in multiple brain regions, including the hippocampus, fusiform gyrus, and middle temporal gyrus, which are commonly affected in Alzheimer's disease. The MMSE score of 22 suggests cognitive impairment, and the presence of one APOE4 allele increases Alzheimer's risk.  \n\n**Diagnosis:** Dementia (likely Alzheimer’s disease)  \n**Confidence:** Medium (clinical correlation and biomarker confirmation would strengthen confidence)",
  "timestamp": "2025-07-26T06:58:48.621600"
}