{
  "ptid_time": "136_S_0429_2007-06-18",
  "img_path": "/data/qiuhui/data/adni/images/136_S_0429/2007-06-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 28,366 mm³, 5.5% below the reference mean. With a Z-score of -0.13 (44.8th percentile), this represents normal volume ; hippocampal volume measures 8,615 mm³, 7.3% above the reference mean. With a Z-score of 0.73 (76.8th percentile), this represents normal volume ; whole brain volume measures 1,302,270 mm³, 14.8% above the reference mean. With a Z-score of 2.09 (98.2th percentile), this represents significant enlargement; entorhinal cortex volume measures 3,780 mm³, 11.3% below the reference mean. With a Z-score of -0.78 (21.7th percentile), this represents normal volume ; fusiform gyrus volume measures 19,136 mm³, 3.9% below the reference mean. With a Z-score of -0.32 (37.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,634 mm³, 3.5% below the reference mean. With a Z-score of -0.29 (38.8th percentile), this represents normal volume . ",
  "text_data": "Age is 63.7 years. Gender is Male. Education: 12 years. MMSE: 25.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. Biomarker levels: Amyloid beta: 1139.00 pg/mL (normal ); Total tau: 211.50 pg/mL (normal ); Phosphorylated tau: 16.85 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements are largely within normal ranges, with only the entorhinal cortex slightly below the reference mean (Z-score -0.78, 21.7th percentile). The MMSE score of 25 is borderline but not definitively impaired. Biomarkers (Aβ, T-tau, P-tau) are normal, and there is no APOE4 risk allele.  \n\n**Diagnosis:** Cognitively Normal (CN)  \n**Confidence:** Medium (due to the borderline MMSE and slightly low entorhinal cortex volume, but normal biomarkers and other volumes support CN)",
  "timestamp": "2025-07-26T16:02:01.107191"
}