{
  "ptid_time": "098_S_0172_2009-03-21",
  "img_path": "/data/qiuhui/data/adni/images/098_S_0172/2009-03-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 16,344 mm³, 41.8% below the reference mean. With a Z-score of -0.96 (16.9th percentile), this represents normal volume ; hippocampal volume measures 7,782 mm³, 9.4% above the reference mean. With a Z-score of 0.86 (80.5th percentile), this represents normal volume ; whole brain volume measures 979,848 mm³, 0.5% above the reference mean. With a Z-score of 0.07 (52.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,831 mm³, 4.3% above the reference mean. With a Z-score of 0.26 (60.4th percentile), this represents normal volume ; fusiform gyrus volume measures 15,842 mm³, 6.9% below the reference mean. With a Z-score of -0.63 (26.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,987 mm³, 1.0% below the reference mean. With a Z-score of -0.08 (46.7th percentile), this represents normal volume . ",
  "text_data": "Age is 73.6 years. Gender is Female. Education: 18 years. MMSE: 30.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. The MMSE score of 30/30 indicates no cognitive impairment, and the absence of APOE4 alleles further reduces Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T10:39:00.456806"
}