{
  "ptid_time": "024_S_4169_2017-08-31",
  "img_path": "/data/qiuhui/data/adni/images/024_S_4169/2017-08-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 23,922 mm³, 7.1% above the reference mean. With a Z-score of 0.18 (57.0th percentile), this represents normal volume ; hippocampal volume measures 7,569 mm³, 1.5% below the reference mean. With a Z-score of -0.17 (43.3th percentile), this represents normal volume ; whole brain volume measures 1,110,170 mm³, 7.9% above the reference mean. With a Z-score of 0.98 (83.6th percentile), this represents normal volume ; entorhinal cortex volume measures 3,667 mm³, 5.8% below the reference mean. With a Z-score of -0.45 (32.6th percentile), this represents normal volume ; fusiform gyrus volume measures 19,617 mm³, 7.7% above the reference mean. With a Z-score of 0.87 (80.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,382 mm³, 4.2% above the reference mean. With a Z-score of 0.37 (64.6th percentile), this represents normal volume . ",
  "text_data": "Age is 68.0 years. Gender is Female. Education: 13 years. MMSE: 28.0. MoCA: 25.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.06 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE 28, MoCA 25) are within normal limits, 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": "2025-07-26T03:19:33.239387"
}