{
  "ptid_time": "128_S_0229_2007-03-22",
  "img_path": "/data/qiuhui/data/adni/images/128_S_0229/2007-03-22/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 11,085 mm³, 60.5% below the reference mean. With a Z-score of -1.39 (8.3th percentile), this represents mild atrophy; hippocampal volume measures 7,358 mm³, 3.4% above the reference mean. With a Z-score of 0.31 (62.3th percentile), this represents normal volume ; whole brain volume measures 954,721 mm³, 2.0% below the reference mean. With a Z-score of -0.26 (39.8th percentile), this represents normal volume ; entorhinal cortex volume measures 2,988 mm³, 18.6% below the reference mean. With a Z-score of -1.14 (12.6th percentile), this represents mild atrophy; fusiform gyrus volume measures 15,730 mm³, 7.5% below the reference mean. With a Z-score of -0.69 (24.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,880 mm³, 1.5% below the reference mean. With a Z-score of -0.13 (44.8th percentile), this represents normal volume . ",
  "text_data": "Age is 75.4 years. Gender is Female. Education: 16 years. MMSE: 29.0. Logical Memory: 18.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows mild atrophy in the ventricular volume and entorhinal cortex, but hippocampal and whole brain volumes are within normal ranges. The MMSE score of 29 is normal, and the presence of one APOE4 allele does not strongly indicate dementia at this stage.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in some regions but normal cognitive performance and no significant hippocampal atrophy)",
  "timestamp": "2025-07-26T13:40:20.754988"
}