{
  "ptid_time": "010_S_0419_2008-06-20",
  "img_path": "/data/qiuhui/data/adni/images/010_S_0419/2008-06-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 27,666 mm³, 28.2% below the reference mean. With a Z-score of -0.67 (25.0th percentile), this represents normal volume ; hippocampal volume measures 10,928 mm³, 44.6% above the reference mean. With a Z-score of 4.35 (100.0th percentile), this represents profound enlargement; whole brain volume measures 1,092,820 mm³, 1.2% above the reference mean. With a Z-score of 0.16 (56.4th percentile), this represents normal volume ; entorhinal cortex volume measures 3,889 mm³, 5.2% below the reference mean. With a Z-score of -0.35 (36.3th percentile), this represents normal volume ; fusiform gyrus volume measures 18,708 mm³, 0.7% below the reference mean. With a Z-score of -0.06 (47.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,896 mm³, 7.3% above the reference mean. With a Z-score of 0.66 (74.4th percentile), this represents normal volume . ",
  "text_data": "Age is 72.2 years. Gender is Male. Education: 18 years. MMSE: 30.0. Logical Memory: 21.0. APOEε4 alleles: 0.0. Biomarker levels: Pittsburgh compound B: 1.25 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is profoundly enlarged (Z-score 4.35, 100th percentile), which is atypical for Alzheimer's disease (AD) where hippocampal atrophy is expected. Other brain volumes (ventricular, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. The MMSE score of 30 is intact, and the absence of APOE4 further reduces AD risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:30:01.495769"
}