{
  "ptid_time": "013_S_4580_2013-04-23",
  "img_path": "/data/qiuhui/data/adni/images/013_S_4580/2013-04-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 17,382 mm³, 38.1% below the reference mean. With a Z-score of -0.87 (19.2th percentile), this represents normal volume ; hippocampal volume measures 8,007 mm³, 12.5% above the reference mean. With a Z-score of 1.15 (87.5th percentile), this represents mild enlargement; whole brain volume measures 977,489 mm³, 0.3% above the reference mean. With a Z-score of 0.04 (51.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,299 mm³, 10.2% below the reference mean. With a Z-score of -0.62 (26.6th percentile), this represents normal volume ; fusiform gyrus volume measures 16,751 mm³, 1.5% below the reference mean. With a Z-score of -0.14 (44.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,546 mm³, 8.5% below the reference mean. With a Z-score of -0.74 (23.1th percentile), this represents normal volume . ",
  "text_data": "Age is 70.7 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 15.0. APOEε4 alleles: 2.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only mild enlargement in the hippocampus and slight reductions in the entorhinal cortex and middle temporal gyrus. Cognitive scores (MMSE 30, MoCA 28) are intact, and while APOE4 homozygosity increases Alzheimer's risk, there is no current evidence of cognitive impairment.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to APOE4 risk but no structural or cognitive deficits)",
  "timestamp": "2025-07-25T23:33:00.778289"
}