{
  "ptid_time": "114_S_6462_2020-12-07",
  "img_path": "/data/qiuhui/data/adni/images/114_S_6462/2020-12-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 54,207 mm³, 40.7% above the reference mean. With a Z-score of 0.98 (83.5th percentile), this represents normal volume ; hippocampal volume measures 7,243 mm³, 4.2% below the reference mean. With a Z-score of -0.41 (34.2th percentile), this represents normal volume ; whole brain volume measures 1,054,040 mm³, 2.3% below the reference mean. With a Z-score of -0.30 (38.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,646 mm³, 11.1% below the reference mean. With a Z-score of -0.75 (22.6th percentile), this represents normal volume ; fusiform gyrus volume measures 19,176 mm³, 1.8% above the reference mean. With a Z-score of 0.15 (56.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 27,548 mm³, 29.1% above the reference mean. With a Z-score of 2.62 (99.6th percentile), this represents significant enlargement. ",
  "text_data": "Age is 71.7 years. Gender is Male. Education: 17 years. MMSE: 29.0. MoCA: 29.0. Logical Memory: 18.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.05 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only the middle temporal gyrus showing significant enlargement (Z-score 2.62), which is atypical but not indicative of neurodegeneration. Cognitive scores (MMSE 29, MoCA 29) are intact, and amyloid PET (AV45) is normal, ruling out Alzheimer's pathology. The single APOE4 allele increases risk but does not confirm disease.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:50:09.895364"
}