{
  "ptid_time": "073_S_4216_2012-03-06",
  "img_path": "/data/qiuhui/data/adni/images/073_S_4216/2012-03-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 45,300 mm³, 81.1% above the reference mean. With a Z-score of 1.08 (85.9th percentile), this represents mild enlargement; hippocampal volume measures 7,860 mm³.; whole brain volume measures 1,227,410 mm³, 3.0% above the reference mean. With a Z-score of 0.55 (70.8th percentile), this represents normal volume ; entorhinal cortex volume measures 4,434 mm³, 10.8% above the reference mean. With a Z-score of 0.94 (82.7th percentile), this represents normal volume ; fusiform gyrus volume measures 21,275 mm³, 2.1% above the reference mean. With a Z-score of 0.31 (62.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,290 mm³.. ",
  "text_data": "Age is 56.9 years. Gender is Male. Education: 14 years. MMSE: 27.0. MoCA: 20.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The patient shows mild ventricular enlargement (81.1% above reference mean) but otherwise normal brain volumes, including hippocampal volume (7,860 mm³). The MMSE (27/30) is within normal limits, but the MoCA (20/30) suggests mild cognitive impairment. The absence of APOE4 reduces genetic risk for Alzheimer’s.  \n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (MoCA is concerning, but structural changes are mild and APOE4-negative status lowers Alzheimer’s likelihood)",
  "timestamp": "2025-07-26T09:40:57.244369"
}