{
  "ptid_time": "116_S_1249_2007-08-22",
  "img_path": "/data/qiuhui/data/adni/images/116_S_1249/2007-08-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 16,097 mm³, 42.6% below the reference mean. With a Z-score of -0.98 (16.4th percentile), this represents normal volume ; hippocampal volume measures 6,874 mm³, 3.4% below the reference mean. With a Z-score of -0.31 (37.8th percentile), this represents normal volume ; whole brain volume measures 923,083 mm³, 5.3% below the reference mean. With a Z-score of -0.67 (25.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,633 mm³, 1.1% below the reference mean. With a Z-score of -0.07 (47.3th percentile), this represents normal volume ; fusiform gyrus volume measures 12,467 mm³, 26.7% below the reference mean. With a Z-score of -2.43 (0.8th percentile), this represents significant atrophy; middle temporal gyrus volume measures 16,209 mm³, 15.4% below the reference mean. With a Z-score of -1.34 (9.0th percentile), this represents mild atrophy. ",
  "text_data": "Age is 71.3 years. Gender is Female. Education: 15 years. MMSE: 30.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain volume data shows significant atrophy in the fusiform gyrus (Z-score -2.43) and mild atrophy in the middle temporal gyrus (Z-score -1.34), while other regions (hippocampus, entorhinal cortex, whole brain) are within normal ranges. The MMSE score of 30 is intact, and there is no reported cognitive impairment. The presence of one APOE4 allele increases Alzheimer's risk but does not confirm pathology.  \n\nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to localized atrophy in fusiform/middle temporal gyri but no clinical symptoms)",
  "timestamp": "2025-07-26T12:02:54.568544"
}