{
  "ptid_time": "033_S_0734_2009-08-12",
  "img_path": "/data/qiuhui/data/adni/images/033_S_0734/2009-08-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 64,231 mm³, 66.8% above the reference mean. With a Z-score of 1.60 (94.5th percentile), this represents moderate enlargement; hippocampal volume measures 7,034 mm³, 6.9% below the reference mean. With a Z-score of -0.68 (24.9th percentile), this represents normal volume ; whole brain volume measures 1,086,220 mm³, 0.6% above the reference mean. With a Z-score of 0.08 (53.3th percentile), this represents normal volume ; entorhinal cortex volume measures 4,714 mm³, 15.0% above the reference mean. With a Z-score of 1.01 (84.5th percentile), this represents mild enlargement; fusiform gyrus volume measures 15,727 mm³, 16.5% below the reference mean. With a Z-score of -1.41 (8.0th percentile), this represents mild atrophy; middle temporal gyrus volume measures 21,363 mm³, 0.1% above the reference mean. With a Z-score of 0.01 (50.4th percentile), this represents normal volume . ",
  "text_data": "Age is 75.6 years. Gender is Male. Education: 18 years. MMSE: 29.0. Logical Memory: 19.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume shows moderate enlargement (Z-score 1.60), which can be associated with neurodegeneration, but hippocampal volume is normal (Z-score -0.68), and whole brain volume is also normal (Z-score 0.08). The fusiform gyrus shows mild atrophy (Z-score -1.41), but other regions like the entorhinal cortex are mildly enlarged. Clinically, the MMSE score of 29 is within the normal range, and there is no APOE4 risk allele.  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (While ventricular enlargement and fusiform gyrus atrophy raise some concern, the preserved hippocampal and whole brain volumes, along with a normal MMSE, suggest no significant cognitive impairment at this time.)",
  "timestamp": "2025-07-26T05:17:22.079184"
}