{
  "ptid_time": "082_S_1256_2009-03-18",
  "img_path": "/data/qiuhui/data/adni/images/082_S_1256/2009-03-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 11,491 mm³, 59.1% below the reference mean. With a Z-score of -1.35 (8.8th percentile), this represents mild atrophy; hippocampal volume measures 6,216 mm³, 12.6% below the reference mean. With a Z-score of -1.16 (12.3th percentile), this represents mild atrophy; whole brain volume measures 871,374 mm³, 10.6% below the reference mean. With a Z-score of -1.33 (9.1th percentile), this represents mild atrophy; entorhinal cortex volume measures 4,445 mm³, 21.0% above the reference mean. With a Z-score of 1.29 (90.2th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,094 mm³, 0.5% above the reference mean. With a Z-score of 0.04 (51.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,481 mm³, 8.8% below the reference mean. With a Z-score of -0.76 (22.2th percentile), this represents normal volume . ",
  "text_data": "Age is 73.6 years. Gender is Female. Education: 17 years. MMSE: 30.0. Logical Memory: 16.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild atrophy in ventricular, hippocampal, and whole brain volumes, but the entorhinal cortex is mildly enlarged. The MMSE score is normal (30/30), and there are no reported cognitive deficits. The APOE4 allele (heterozygous) increases Alzheimer's risk but does not confirm pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to mild atrophy but normal cognition and lack of clinical symptoms)",
  "timestamp": "2025-07-26T10:01:51.750538"
}