{
  "ptid_time": "129_S_2332_2017-05-16",
  "img_path": "/data/qiuhui/data/adni/images/129_S_2332/2017-05-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 16,438 mm³, 41.4% below the reference mean. With a Z-score of -0.95 (17.1th percentile), this represents normal volume ; hippocampal volume measures 6,813 mm³, 4.2% below the reference mean. With a Z-score of -0.39 (34.9th percentile), this represents normal volume ; whole brain volume measures 915,035 mm³, 6.1% below the reference mean. With a Z-score of -0.77 (22.1th percentile), this represents normal volume ; entorhinal cortex volume measures 3,610 mm³, 1.7% below the reference mean. With a Z-score of -0.11 (45.8th percentile), this represents normal volume ; fusiform gyrus volume measures 16,054 mm³, 5.6% below the reference mean. With a Z-score of -0.51 (30.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,512 mm³, 8.6% below the reference mean. With a Z-score of -0.75 (22.6th percentile), this represents normal volume . ",
  "text_data": "Age is 76.5 years. Gender is Female. Education: 16 years. MMSE: 30.0. MoCA: 27.0. Logical Memory: 17.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.04 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are within normal ranges based on Z-scores and percentiles. Cognitive testing (MMSE 30, MoCA 27) is also normal, and amyloid PET (AV45) is negative. No significant atrophy or biomarker evidence of Alzheimer’s pathology is present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T14:12:34.606401"
}