{
  "ptid_time": "011_S_0021_2007-11-12",
  "img_path": "/data/qiuhui/data/adni/images/011_S_0021/2007-11-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,838 mm³, 43.6% below the reference mean. With a Z-score of -1.00 (15.9th percentile), this represents normal volume ; hippocampal volume measures 7,721 mm³, 8.5% above the reference mean. With a Z-score of 0.78 (78.3th percentile), this represents normal volume ; whole brain volume measures 955,072 mm³, 2.0% below the reference mean. With a Z-score of -0.25 (40.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,701 mm³, 0.8% above the reference mean. With a Z-score of 0.05 (51.9th percentile), this represents normal volume ; fusiform gyrus volume measures 17,147 mm³, 0.8% above the reference mean. With a Z-score of 0.07 (52.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,093 mm³, 16.0% below the reference mean. With a Z-score of -1.39 (8.2th percentile), this represents mild atrophy. ",
  "text_data": "Age is 74.6 years. Gender is Female. Education: 18 years. MMSE: 29.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus) are within normal ranges except for mild atrophy in the middle temporal gyrus. The MMSE score of 29 is within the normal range, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (Mild middle temporal gyrus atrophy is present but not strongly indicative of cognitive impairment given other normal findings.)",
  "timestamp": "2025-07-25T22:39:46.068985"
}