{
  "ptid_time": "098_S_2052_2014-09-17",
  "img_path": "/data/qiuhui/data/adni/images/098_S_2052/2014-09-17/t1.nii.gz",
  "img_finding": "Image findings: hippocampal volume measures 7,442 mm³, 1.5% below the reference mean. With a Z-score of -0.15 (44.0th percentile), this represents normal volume ; whole brain volume measures 1,274,380 mm³, 18.1% above the reference mean. With a Z-score of 2.34 (99.0th percentile), this represents significant enlargement; entorhinal cortex volume measures 4,482 mm³, 9.3% above the reference mean. With a Z-score of 0.63 (73.6th percentile), this represents normal volume ; fusiform gyrus volume measures 23,192 mm³, 23.1% above the reference mean. With a Z-score of 1.97 (97.5th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 22,121 mm³, 3.7% above the reference mean. With a Z-score of 0.33 (62.9th percentile), this represents normal volume . ",
  "text_data": "Age is 77.1 years. Gender is Male. Education: 20 years. MMSE: 27.0. MoCA: 25.0. Logical Memory: 7.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.02 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume is within normal limits (Z-score -0.15, 44th percentile), and other key regions (entorhinal cortex, middle temporal gyrus) also show normal volumes. The whole brain and fusiform gyrus volumes are enlarged, which is atypical for Alzheimer’s but not indicative of neurodegeneration. Cognitive scores (MMSE 27, MoCA 25) are within normal range for age, and amyloid PET (AV45) is normal.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T10:44:05.206307"
}