{
  "ptid_time": "129_S_4369_2012-12-11",
  "img_path": "/data/qiuhui/data/adni/images/129_S_4369/2012-12-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 12,879 mm³, 57.1% below the reference mean. With a Z-score of -1.36 (8.7th percentile), this represents mild atrophy; hippocampal volume measures 7,554 mm³, 5.9% below the reference mean. With a Z-score of -0.59 (27.8th percentile), this represents normal volume ; whole brain volume measures 1,032,010 mm³, 9.0% below the reference mean. With a Z-score of -1.28 (10.0th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,631 mm³, 14.8% below the reference mean. With a Z-score of -1.03 (15.2th percentile), this represents mild atrophy; fusiform gyrus volume measures 16,617 mm³, 16.5% below the reference mean. With a Z-score of -1.37 (8.5th percentile), this represents mild atrophy; middle temporal gyrus volume measures 18,862 mm³, 15.8% below the reference mean. With a Z-score of -1.30 (9.6th percentile), this represents mild atrophy. ",
  "text_data": "Age is 69.3 years. Gender is Male. Education: 20 years. MMSE: 28.0. MoCA: 27.0. Logical Memory: 13.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The imaging data shows mild atrophy in multiple brain regions (ventricular volume, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus), but hippocampal volume is within normal limits. Cognitive scores (MMSE 28, MoCA 27) are intact, and there is no APOE4 genetic risk. The atrophy pattern is concerning but not yet accompanied by cognitive decline.  \n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Atrophy is present, but cognitive scores remain normal; progression to dementia is uncertain without further decline.)",
  "timestamp": "2025-07-26T14:15:42.061334"
}