{
  "ptid_time": "041_S_6159_2018-01-03",
  "img_path": "/data/qiuhui/data/adni/images/041_S_6159/2018-01-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 58,963 mm³, 53.1% above the reference mean. With a Z-score of 1.27 (89.8th percentile), this represents mild enlargement; hippocampal volume measures 6,237 mm³, 17.5% below the reference mean. With a Z-score of -1.71 (4.4th percentile), this represents moderate atrophy; whole brain volume measures 1,140,990 mm³, 5.7% above the reference mean. With a Z-score of 0.74 (77.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,593 mm³, 12.4% below the reference mean. With a Z-score of -0.84 (20.1th percentile), this represents normal volume ; fusiform gyrus volume measures 18,050 mm³, 4.2% below the reference mean. With a Z-score of -0.36 (36.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,555 mm³, 5.7% above the reference mean. With a Z-score of 0.51 (69.6th percentile), this represents normal volume . ",
  "text_data": "Age is 76.2 years. Gender is Male. Education: 20 years. MMSE: 30.0. MoCA: 25.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Flobetaben (FBB): 1.09 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows moderate hippocampal atrophy (Z-score -1.71, 4.4th percentile) and mild ventricular enlargement, which are suggestive of early neurodegenerative changes. However, cognitive scores (MMSE 30, MoCA 25) are within normal to borderline range, and other brain regions (whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) show normal volumes. The absence of APOE4 and preserved global cognition suggest a milder cognitive impairment rather than full dementia.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to hippocampal atrophy but relatively preserved cognition and no APOE4 risk)",
  "timestamp": "2025-07-26T07:28:48.383522"
}