{
  "ptid_time": "941_S_4376_2018-08-15",
  "img_path": "/data/qiuhui/data/adni/images/941_S_4376/2018-08-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,666 mm³, 4.6% above the reference mean. With a Z-score of 0.12 (54.9th percentile), this represents normal volume ; hippocampal volume measures 6,913 mm³, 6.4% above the reference mean. With a Z-score of 0.52 (69.7th percentile), this represents normal volume ; whole brain volume measures 941,304 mm³, 1.4% above the reference mean. With a Z-score of 0.17 (56.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,502 mm³, 30.0% above the reference mean. With a Z-score of 1.62 (94.7th percentile), this represents moderate enlargement; fusiform gyrus volume measures 14,915 mm³, 7.4% below the reference mean. With a Z-score of -0.56 (28.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,422 mm³, 8.9% below the reference mean. With a Z-score of -0.79 (21.4th percentile), this represents normal volume . ",
  "text_data": "Age is 83.0 years. Gender is Female. Education: 16 years. MMSE: 28.0. MoCA: 27.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.98 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only the entorhinal cortex showing moderate enlargement (likely not pathological). Cognitive scores (MMSE 28, MoCA 27) are intact, and amyloid PET (AV45) is normal. No significant atrophy or biomarker evidence of Alzheimer’s pathology is present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T17:41:32.499676"
}