{
  "ptid_time": "037_S_4028_2011-11-21",
  "img_path": "/data/qiuhui/data/adni/images/037_S_4028/2011-11-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 9,255 mm³, 58.6% below the reference mean. With a Z-score of -1.47 (7.1th percentile), this represents mild atrophy; hippocampal volume measures 6,570 mm³, 14.5% below the reference mean. With a Z-score of -1.63 (5.2th percentile), this represents moderate atrophy; whole brain volume measures 997,316 mm³, 3.1% below the reference mean. With a Z-score of -0.39 (35.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,480 mm³, 10.6% below the reference mean. With a Z-score of -0.82 (20.6th percentile), this represents normal volume ; fusiform gyrus volume measures 19,224 mm³, 5.6% above the reference mean. With a Z-score of 0.63 (73.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 18,506 mm³, 9.8% below the reference mean. With a Z-score of -0.87 (19.2th percentile), this represents normal volume . ",
  "text_data": "Age is 64.0 years. Gender is Female. Education: 18 years. MMSE: 30.0. MoCA: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows mild to moderate atrophy in the hippocampus and ventricles, which are early markers of neurodegeneration, but cognitive scores (MMSE 30, MoCA 29) are intact, and APOE4-negative status reduces genetic risk.  \n**Diagnosis:** **Mild Cognitive Impairment (MCI)** (structural changes without overt cognitive decline).  \n**Confidence:** **Medium** (imaging suggests early neurodegeneration, but cognitive performance remains normal).",
  "timestamp": "2025-07-26T06:39:17.969117"
}