{
  "ptid_time": "129_S_0778_2008-09-12",
  "img_path": "/data/qiuhui/data/adni/images/129_S_0778/2008-09-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,610 mm³, 23.1% below the reference mean. With a Z-score of -0.55 (29.0th percentile), this represents normal volume ; hippocampal volume measures 7,005 mm³, 7.3% below the reference mean. With a Z-score of -0.72 (23.7th percentile), this represents normal volume ; whole brain volume measures 1,017,470 mm³, 5.7% below the reference mean. With a Z-score of -0.74 (22.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,825 mm³, 6.7% below the reference mean. With a Z-score of -0.46 (32.4th percentile), this represents normal volume ; fusiform gyrus volume measures 18,370 mm³, 2.5% below the reference mean. With a Z-score of -0.21 (41.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,682 mm³, 6.3% above the reference mean. With a Z-score of 0.57 (71.4th percentile), this represents normal volume . ",
  "text_data": "Age is 74.4 years. Gender is Male. Education: 13 years. MMSE: 26.0. Logical Memory: 8.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: All brain volumes (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 26 is slightly below the typical cutoff of 27-30 for normal cognition but is not strongly indicative of impairment. The presence of one APOE4 allele increases Alzheimer's risk but does not confirm pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to borderline MMSE and APOE4 status, but normal imaging)",
  "timestamp": "2025-07-26T14:09:24.882257"
}