{
  "ptid_time": "031_S_2022_2011-02-15",
  "img_path": "/data/qiuhui/data/adni/images/031_S_2022/2011-02-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,609 mm³, 34.7% below the reference mean. With a Z-score of -0.82 (20.5th percentile), this represents normal volume ; hippocampal volume measures 8,832 mm³, 10.0% above the reference mean. With a Z-score of 1.00 (84.2th percentile), this represents mild enlargement; whole brain volume measures 1,166,630 mm³, 2.8% above the reference mean. With a Z-score of 0.40 (65.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,175 mm³, 2.1% below the reference mean. With a Z-score of -0.14 (44.3th percentile), this represents normal volume ; fusiform gyrus volume measures 19,122 mm³, 4.0% below the reference mean. With a Z-score of -0.33 (37.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 24,091 mm³, 7.5% above the reference mean. With a Z-score of 0.62 (73.1th percentile), this represents normal volume . ",
  "text_data": "Age is 66.5 years. Gender is Male. Education: 18 years. MMSE: 29.0. MoCA: 26.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with no significant atrophy in key regions like the hippocampus or entorhinal cortex. Cognitive scores (MMSE 29, MoCA 26) are also within normal limits, though the MoCA is slightly lower than expected for age. The presence of one APOE4 allele increases Alzheimer's risk but does not confirm pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to borderline MoCA and APOE4 status, but no structural or significant cognitive deficits)",
  "timestamp": "2025-07-26T04:42:12.051610"
}