{
  "ptid_time": "006_S_4485_2014-03-14",
  "img_path": "/data/qiuhui/data/adni/images/006_S_4485/2014-03-14/t1.nii.gz",
  "img_finding": "Image findings: hippocampal volume measures 8,513 mm³, 12.6% above the reference mean. With a Z-score of 1.23 (89.1th percentile), this represents mild enlargement; whole brain volume measures 1,149,510 mm³, 6.5% above the reference mean. With a Z-score of 0.84 (80.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,981 mm³, 2.9% below the reference mean. With a Z-score of -0.20 (42.2th percentile), this represents normal volume ; fusiform gyrus volume measures 19,272 mm³, 2.3% above the reference mean. With a Z-score of 0.20 (57.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,575 mm³, 1.1% above the reference mean. With a Z-score of 0.10 (54.0th percentile), this represents normal volume . ",
  "text_data": "Age is 75.3 years. Gender is Male. Education: 17 years. MMSE: 30.0. MoCA: 26.0. Logical Memory: 12.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.19 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is mildly enlarged (12.6% above mean, Z-score 1.23), while other brain regions (whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges. Cognitive testing (MMSE 30, MoCA 26) shows no significant impairment, and amyloid PET (AV45) is normal. APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T21:38:52.695077"
}