{
  "ptid_time": "135_S_4356_2013-12-09",
  "img_path": "/data/qiuhui/data/adni/images/135_S_4356/2013-12-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,785 mm³, 61.6% below the reference mean. With a Z-score of -1.48 (7.0th percentile), this represents mild atrophy; hippocampal volume measures 8,935 mm³, 18.2% above the reference mean. With a Z-score of 1.78 (96.2th percentile), this represents moderate enlargement; whole brain volume measures 1,103,640 mm³, 2.2% above the reference mean. With a Z-score of 0.29 (61.5th percentile), this represents normal volume ; entorhinal cortex volume measures 5,011 mm³, 22.2% above the reference mean. With a Z-score of 1.51 (93.4th percentile), this represents moderate enlargement; fusiform gyrus volume measures 19,042 mm³, 1.1% above the reference mean. With a Z-score of 0.09 (53.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,033 mm³, 1.4% below the reference mean. With a Z-score of -0.13 (44.9th percentile), this represents normal volume . ",
  "text_data": "Age is 70.1 years. Gender is Male. Education: 20 years. MMSE: 30.0. MoCA: 28.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.05 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular enlargement (suggesting mild atrophy) but otherwise normal or even enlarged hippocampal, entorhinal cortex, and whole brain volumes. Cognitive testing (MMSE 30, MoCA 28) is within normal limits, and amyloid PET (AV45) is negative. APOE4-negative status further reduces Alzheimer’s risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T15:34:22.448132"
}