{
  "ptid_time": "041_S_0679_2017-07-05",
  "img_path": "/data/qiuhui/data/adni/images/041_S_0679/2017-07-05/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,491 mm³, 23.4% below the reference mean. With a Z-score of -0.56 (28.7th 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 1,132,080 mm³, 4.9% above the reference mean. With a Z-score of 0.63 (73.7th percentile), this represents normal volume ; entorhinal cortex volume measures 5,120 mm³, 24.9% above the reference mean. With a Z-score of 1.69 (95.4th percentile), this represents moderate enlargement; fusiform gyrus volume measures 20,866 mm³, 10.8% above the reference mean. With a Z-score of 0.92 (82.0th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,362 mm³, 4.8% above the reference mean. With a Z-score of 0.43 (66.7th percentile), this represents normal volume . ",
  "text_data": "Age is 73.9 years. Gender is Male. Education: 18 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 19.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.11 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, fusiform gyrus, middle temporal gyrus) are within normal ranges or even slightly above average. The entorhinal cortex shows moderate 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. APOE4-negative status further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T07:01:05.767314"
}