{
  "ptid_time": "133_S_0433_2009-05-20",
  "img_path": "/data/qiuhui/data/adni/images/133_S_0433/2009-05-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,234 mm³, 34.4% below the reference mean. With a Z-score of -0.93 (17.6th percentile), this represents normal volume ; hippocampal volume measures 6,749 mm³, 3.9% above the reference mean. With a Z-score of 0.31 (62.3th percentile), this represents normal volume ; whole brain volume measures 851,357 mm³, 8.3% below the reference mean. With a Z-score of -0.99 (16.0th percentile), this represents normal volume ; entorhinal cortex volume measures 2,521 mm³, 27.2% below the reference mean. With a Z-score of -1.47 (7.1th percentile), this represents mild atrophy; fusiform gyrus volume measures 13,144 mm³, 18.4% below the reference mean. With a Z-score of -1.38 (8.3th percentile), this represents mild atrophy; middle temporal gyrus volume measures 18,392 mm³, 2.0% above the reference mean. With a Z-score of 0.18 (57.1th percentile), this represents normal volume . ",
  "text_data": "Age is 88.5 years. Gender is Female. Education: 14 years. MMSE: 26.0. Logical Memory: 17.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild atrophy in the entorhinal cortex and fusiform gyrus, which are regions often affected in early Alzheimer's disease. However, hippocampal volume is normal, and the MMSE score of 26 is within the normal range for age, suggesting no significant cognitive impairment. The absence of APOE4 also reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in key regions but normal cognitive performance and no genetic risk)",
  "timestamp": "2025-07-26T15:16:28.779292"
}