{
  "ptid_time": "041_S_4041_2011-10-11",
  "img_path": "/data/qiuhui/data/adni/images/041_S_4041/2011-10-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,020 mm³, 14.4% below the reference mean. With a Z-score of -0.33 (37.1th percentile), this represents normal volume ; hippocampal volume measures 5,131 mm³, 27.9% below the reference mean. With a Z-score of -2.56 (0.5th percentile), this represents significant atrophy; whole brain volume measures 819,849 mm³, 15.9% below the reference mean. With a Z-score of -2.00 (2.3th percentile), this represents moderate atrophy; entorhinal cortex volume measures 2,942 mm³, 19.9% below the reference mean. With a Z-score of -1.22 (11.1th percentile), this represents mild atrophy; fusiform gyrus volume measures 15,163 mm³, 10.9% below the reference mean. With a Z-score of -0.99 (16.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,405 mm³, 14.4% below the reference mean. With a Z-score of -1.25 (10.5th percentile), this represents mild atrophy. ",
  "text_data": "Age is 78.4 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 26.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows significant atrophy (Z-score -2.56, 0.5th percentile), and whole brain volume shows moderate atrophy (Z-score -2.00, 2.3rd percentile), both concerning for neurodegeneration. However, cognitive scores (MMSE 30, MoCA 26) are within normal limits, suggesting preserved function despite structural changes.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (structural atrophy without significant cognitive decline)  \n**Confidence:** **Medium** (imaging strongly suggests neurodegeneration, but cognitive scores are normal—could represent preclinical AD or stable MCI)",
  "timestamp": "2025-07-26T07:10:42.811821"
}