{
  "ptid_time": "099_S_2146_2016-09-02",
  "img_path": "/data/qiuhui/data/adni/images/099_S_2146/2016-09-02/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,146 mm³, 19.1% below the reference mean. With a Z-score of -0.46 (32.3th percentile), this represents normal volume ; hippocampal volume measures 8,637 mm³, 14.3% above the reference mean. With a Z-score of 1.39 (91.8th percentile), this represents mild enlargement; whole brain volume measures 1,129,710 mm³, 4.7% above the reference mean. With a Z-score of 0.61 (72.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,765 mm³, 16.2% above the reference mean. With a Z-score of 1.10 (86.4th percentile), this represents mild enlargement; fusiform gyrus volume measures 21,890 mm³, 16.2% above the reference mean. With a Z-score of 1.38 (91.6th percentile), this represents mild enlargement; middle temporal gyrus volume measures 25,708 mm³, 20.5% above the reference mean. With a Z-score of 1.84 (96.7th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 72.3 years. Gender is Male. Education: 18 years. MMSE: 28.0. MoCA: 28.0. Logical Memory: 20.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.98 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or mildly/moderately enlarged structures, with no significant atrophy typically seen in Alzheimer's disease. Cognitive scores (MMSE and MoCA) are within the normal range, and amyloid PET (AV45) is normal. The absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:03:18.896157"
}