{
  "ptid_time": "013_S_4580_2018-02-06",
  "img_path": "/data/qiuhui/data/adni/images/013_S_4580/2018-02-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,296 mm³, 20.6% below the reference mean. With a Z-score of -0.47 (31.9th percentile), this represents normal volume ; hippocampal volume measures 7,023 mm³, 1.3% below the reference mean. With a Z-score of -0.12 (45.3th percentile), this represents normal volume ; whole brain volume measures 933,847 mm³, 4.2% below the reference mean. With a Z-score of -0.53 (29.9th percentile), this represents normal volume ; entorhinal cortex volume measures 4,095 mm³, 11.5% above the reference mean. With a Z-score of 0.71 (76.0th percentile), this represents normal volume ; fusiform gyrus volume measures 17,103 mm³, 0.5% above the reference mean. With a Z-score of 0.05 (51.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 16,910 mm³, 11.8% below the reference mean. With a Z-score of -1.02 (15.3th percentile), this represents mild atrophy. ",
  "text_data": "Age is 75.2 years. Gender is Female. Education: 16 years. MMSE: 27.0. MoCA: 28.0. Logical Memory: 20.0. APOEε4 alleles: 2.0. Biomarker levels: Florbetapir (AV45): 1.03 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with only mild atrophy in the middle temporal gyrus. Cognitive scores (MMSE 27, MoCA 28) are within normal ranges, and amyloid PET (AV45) is normal despite the presence of two APOE4 alleles.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild temporal atrophy but preserved cognition and normal amyloid status)",
  "timestamp": "2025-07-25T23:33:13.507622"
}