{
  "ptid_time": "099_S_4076_2013-07-09",
  "img_path": "/data/qiuhui/data/adni/images/099_S_4076/2013-07-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 34,586 mm³, 23.2% above the reference mean. With a Z-score of 0.53 (70.3th percentile), this represents normal volume ; hippocampal volume measures 7,268 mm³, 2.2% above the reference mean. With a Z-score of 0.20 (57.8th percentile), this represents normal volume ; whole brain volume measures 977,055 mm³, 0.2% above the reference mean. With a Z-score of 0.03 (51.2th percentile), this represents normal volume ; entorhinal cortex volume measures 3,665 mm³, 0.2% below the reference mean. With a Z-score of -0.01 (49.5th percentile), this represents normal volume ; fusiform gyrus volume measures 19,939 mm³, 17.2% above the reference mean. With a Z-score of 1.57 (94.1th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 18,606 mm³, 2.9% below the reference mean. With a Z-score of -0.26 (39.9th percentile), this represents normal volume . ",
  "text_data": "Age is 74.6 years. Gender is Female. Education: 20 years. MMSE: 28.0. MoCA: 26.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.92 SUVR (mild reduced); Total tau: 169.80 pg/mL (normal ); Phosphorylated tau: 13.75 pg/mL (mild reduced). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, middle temporal gyrus) are within normal ranges, with only the fusiform gyrus showing moderate enlargement (likely not clinically significant). Cognitive scores (MMSE 28, MoCA 26) are normal, and biomarkers (T-tau normal, P-tau/Aβ mildly reduced) do not strongly suggest Alzheimer’s pathology. APOE4-negative status further lowers Alzheimer’s risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:04:47.835988"
}