{
  "ptid_time": "099_S_6476_2020-08-24",
  "img_path": "/data/qiuhui/data/adni/images/099_S_6476/2020-08-24/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,268 mm³, 24.0% below the reference mean. With a Z-score of -0.58 (28.3th percentile), this represents normal volume ; hippocampal volume measures 7,084 mm³, 6.3% below the reference mean. With a Z-score of -0.61 (27.0th percentile), this represents normal volume ; whole brain volume measures 1,102,070 mm³, 2.1% above the reference mean. With a Z-score of 0.27 (60.7th percentile), this represents normal volume ; entorhinal cortex volume measures 4,021 mm³, 1.9% below the reference mean. With a Z-score of -0.13 (44.8th percentile), this represents normal volume ; fusiform gyrus volume measures 17,373 mm³, 7.8% below the reference mean. With a Z-score of -0.66 (25.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,170 mm³, 5.5% below the reference mean. With a Z-score of -0.49 (31.1th percentile), this represents normal volume . ",
  "text_data": "Age is 77.2 years. Gender is Male. Education: 16 years. MMSE: 29.0. MoCA: 27.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.01 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "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 assessments (MMSE: 29, MoCA: 27) 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": "2025-07-26T11:13:06.350523"
}