{
  "ptid_time": "006_S_0681_2006-08-31",
  "img_path": "/data/qiuhui/data/adni/images/006_S_0681/2006-08-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,853 mm³, 45.6% above the reference mean. With a Z-score of 1.04 (85.2th percentile), this represents mild enlargement; hippocampal volume measures 7,694 mm³, 8.1% above the reference mean. With a Z-score of 0.75 (77.2th percentile), this represents normal volume ; whole brain volume measures 1,011,330 mm³, 3.8% above the reference mean. With a Z-score of 0.47 (68.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,207 mm³, 14.5% above the reference mean. With a Z-score of 0.89 (81.4th percentile), this represents normal volume ; fusiform gyrus volume measures 18,024 mm³, 5.9% above the reference mean. With a Z-score of 0.54 (70.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,373 mm³, 6.3% above the reference mean. With a Z-score of 0.55 (70.7th percentile), this represents normal volume . ",
  "text_data": "Age is 76.8 years. Gender is Female. Education: 19 years. MMSE: 30.0. Logical Memory: 20.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows mild enlargement (Z-score 1.04), but all other brain regions, including the hippocampus, entorhinal cortex, and temporal structures, are within normal ranges (Z-scores < 1). The MMSE score of 30 is intact, and while APOE4 carrier status increases Alzheimer's risk, there is no current cognitive or structural evidence of impairment.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:31:05.544284"
}