{
  "ptid_time": "012_S_4643_2013-04-22",
  "img_path": "/data/qiuhui/data/adni/images/012_S_4643/2013-04-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,532 mm³, 45.6% above the reference mean. With a Z-score of 1.14 (87.3th percentile), this represents mild enlargement; hippocampal volume measures 6,946 mm³, 9.6% below the reference mean. With a Z-score of -1.08 (14.0th percentile), this represents mild atrophy; whole brain volume measures 1,006,180 mm³, 2.2% below the reference mean. With a Z-score of -0.28 (39.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,555 mm³, 8.7% below the reference mean. With a Z-score of -0.67 (25.1th percentile), this represents normal volume ; fusiform gyrus volume measures 19,018 mm³, 4.4% above the reference mean. With a Z-score of 0.50 (69.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,899 mm³, 12.8% below the reference mean. With a Z-score of -1.14 (12.8th percentile), this represents mild atrophy. ",
  "text_data": "Age is 66.1 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging shows mild hippocampal and middle temporal gyrus atrophy, along with mild ventricular enlargement, which are early markers of neurodegeneration. However, cognitive scores (MMSE, MoCA) are intact, and there is no significant whole-brain or entorhinal cortex atrophy.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Structural changes suggest early neurodegeneration, but cognitive performance remains normal, making progression uncertain.)",
  "timestamp": "2025-07-25T23:15:32.032818"
}