{
  "ptid_time": "007_S_1222_2009-02-19",
  "img_path": "/data/qiuhui/data/adni/images/007_S_1222/2009-02-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,459 mm³, 34.2% below the reference mean. With a Z-score of -0.78 (21.7th percentile), this represents normal volume ; hippocampal volume measures 7,500 mm³, 5.4% above the reference mean. With a Z-score of 0.50 (69.0th percentile), this represents normal volume ; whole brain volume measures 897,726 mm³, 7.9% below the reference mean. With a Z-score of -0.99 (16.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,463 mm³, 5.7% below the reference mean. With a Z-score of -0.35 (36.3th percentile), this represents normal volume ; fusiform gyrus volume measures 14,586 mm³, 14.3% below the reference mean. With a Z-score of -1.30 (9.7th percentile), this represents mild atrophy; middle temporal gyrus volume measures 17,930 mm³, 6.5% below the reference mean. With a Z-score of -0.56 (28.7th percentile), this represents normal volume . ",
  "text_data": "Age is 75.4 years. Gender is Female. Education: 16 years. MMSE: 29.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with only mild atrophy in the fusiform gyrus. The MMSE score of 29 is within the normal range, and the absence of APOE4 alleles reduces genetic risk. No significant hippocampal or entorhinal cortex atrophy is present, which are key markers for Alzheimer's.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:54:06.447717"
}