{
  "ptid_time": "037_S_4706_2013-05-08",
  "img_path": "/data/qiuhui/data/adni/images/037_S_4706/2013-05-08/t1.nii.gz",
  "img_finding": "Image findings: hippocampal volume measures 7,857 mm³, 2.1% below the reference mean. With a Z-score of -0.21 (41.6th percentile), this represents normal volume ; whole brain volume measures 1,087,160 mm³, 4.2% below the reference mean. With a Z-score of -0.59 (27.7th percentile), this represents normal volume ; entorhinal cortex volume measures 3,982 mm³, 6.6% below the reference mean. With a Z-score of -0.46 (32.4th percentile), this represents normal volume ; fusiform gyrus volume measures 19,523 mm³, 1.9% below the reference mean. With a Z-score of -0.16 (43.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,268 mm³, 0.6% below the reference mean. With a Z-score of -0.05 (47.9th percentile), this represents normal volume . ",
  "text_data": "Age is 61.7 years. Gender is Male. Education: 14 years. MMSE: 26.0. MoCA: 19.0. Logical Memory: 12.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The brain volumes (hippocampus, entorhinal cortex, fusiform gyrus, etc.) are all within normal ranges (Z-scores between -0.59 and -0.05, percentiles 27.7–47.9). However, the MoCA score of 19 suggests cognitive impairment, while the MMSE of 26 is borderline normal. The presence of one APOE4 allele increases Alzheimer’s risk but is not diagnostic.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to normal brain volumes but significant MoCA impairment, suggesting early cognitive decline not yet meeting dementia criteria).",
  "timestamp": "2025-07-26T06:47:19.299546"
}