{
  "ptid_time": "023_S_4448_2017-12-04",
  "img_path": "/data/qiuhui/data/adni/images/023_S_4448/2017-12-04/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,005 mm³, 19.4% below the reference mean. With a Z-score of -0.49 (31.4th percentile), this represents normal volume ; hippocampal volume measures 7,976 mm³, 3.8% above the reference mean. With a Z-score of 0.43 (66.5th percentile), this represents normal volume ; whole brain volume measures 1,045,950 mm³, 1.6% above the reference mean. With a Z-score of 0.20 (58.0th percentile), this represents normal volume ; entorhinal cortex volume measures 4,054 mm³, 4.1% above the reference mean. With a Z-score of 0.32 (62.6th percentile), this represents normal volume ; fusiform gyrus volume measures 18,569 mm³, 2.0% above the reference mean. With a Z-score of 0.22 (58.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,765 mm³, 10.9% above the reference mean. With a Z-score of 0.97 (83.5th percentile), this represents normal volume . ",
  "text_data": "Age is 69.8 years. Gender is Female. Education: 16 years. MMSE: 29.0. MoCA: 29.0. Logical Memory: 15.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.05 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges, with Z-scores close to or above the mean. Cognitive scores (MMSE and MoCA) are also in the normal range (29/30), 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": "2025-07-26T03:05:52.449433"
}