{
  "ptid_time": "022_S_4320_2012-07-20",
  "img_path": "/data/qiuhui/data/adni/images/022_S_4320/2012-07-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 41,856 mm³, 49.1% above the reference mean. With a Z-score of 1.12 (87.0th percentile), this represents mild enlargement; hippocampal volume measures 8,478 mm³, 19.2% above the reference mean. With a Z-score of 1.76 (96.1th percentile), this represents moderate enlargement; whole brain volume measures 1,023,180 mm³, 5.0% above the reference mean. With a Z-score of 0.63 (73.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,589 mm³, 2.3% below the reference mean. With a Z-score of -0.14 (44.4th percentile), this represents normal volume ; fusiform gyrus volume measures 16,526 mm³, 2.9% below the reference mean. With a Z-score of -0.26 (39.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,840 mm³, 13.9% above the reference mean. With a Z-score of 1.21 (88.7th percentile), this represents mild enlargement. ",
  "text_data": "Age is 71.2 years. Gender is Female. Education: 12 years. MMSE: 30.0. MoCA: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular enlargement and moderate hippocampal enlargement, but other regions (whole brain, entorhinal cortex, fusiform gyrus) are within normal ranges. The MMSE and MoCA scores are both perfect (30/30), and there is no APOE4 allele, which reduces Alzheimer's risk. No cognitive deficits are reported.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (While structural changes are present, the lack of cognitive impairment and genetic risk factors suggests normal aging rather than pathology.)",
  "timestamp": "2025-07-26T02:20:05.526227"
}