{
  "ptid_time": "012_S_5157_2019-01-15",
  "img_path": "/data/qiuhui/data/adni/images/012_S_5157/2019-01-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 46,747 mm³, 21.4% above the reference mean. With a Z-score of 0.51 (69.6th percentile), this represents normal volume ; hippocampal volume measures 7,768 mm³, 2.8% above the reference mean. With a Z-score of 0.27 (60.6th percentile), this represents normal volume ; whole brain volume measures 1,117,430 mm³, 3.5% above the reference mean. With a Z-score of 0.46 (67.6th percentile), this represents normal volume ; entorhinal cortex volume measures 5,332 mm³, 30.0% above the reference mean. With a Z-score of 2.04 (97.9th percentile), this represents significant enlargement; fusiform gyrus volume measures 20,892 mm³, 10.9% above the reference mean. With a Z-score of 0.93 (82.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 24,343 mm³, 14.1% above the reference mean. With a Z-score of 1.27 (89.7th percentile), this represents mild enlargement. ",
  "text_data": "Age is 71.0 years. Gender is Male. Education: 17 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.96 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, fusiform gyrus) are within normal ranges or mildly enlarged, with no significant atrophy. The entorhinal cortex shows significant enlargement, which is atypical for Alzheimer's but not indicative of neurodegeneration. Cognitive scores (MMSE 30, MoCA 27) are normal, and amyloid PET (AV45) is negative, ruling out amyloid pathology.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T23:18:00.681003"
}