{
  "ptid_time": "100_S_4556_2017-01-30",
  "img_path": "/data/qiuhui/data/adni/images/100_S_4556/2017-01-30/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 35,591 mm³, 7.6% below the reference mean. With a Z-score of -0.18 (42.8th percentile), this represents normal volume ; hippocampal volume measures 7,988 mm³, 5.7% above the reference mean. With a Z-score of 0.55 (71.0th percentile), this represents normal volume ; whole brain volume measures 1,048,400 mm³, 2.9% below the reference mean. With a Z-score of -0.37 (35.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,105 mm³, 0.1% above the reference mean. With a Z-score of 0.01 (50.3th percentile), this represents normal volume ; fusiform gyrus volume measures 20,517 mm³, 8.9% above the reference mean. With a Z-score of 0.76 (77.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,966 mm³, 2.9% above the reference mean. With a Z-score of 0.26 (60.4th percentile), this represents normal volume . ",
  "text_data": "Age is 76.9 years. Gender is Male. Education: 20 years. MMSE: 27.0. MoCA: 25.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.96 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are within normal ranges, with Z-scores close to or above the mean. Cognitive scores (MMSE 27, MoCA 25) are also within normal limits for age, 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": "2025-07-26T11:26:21.162927"
}