{
  "ptid_time": "002_S_4213_2015-09-29",
  "img_path": "/data/qiuhui/data/adni/images/002_S_4213/2015-09-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 38,698 mm³, 4.7% above the reference mean. With a Z-score of 0.13 (55.0th percentile), this represents normal volume ; hippocampal volume measures 7,114 mm³, 9.5% above the reference mean. With a Z-score of 0.76 (77.7th percentile), this represents normal volume ; whole brain volume measures 961,224 mm³, 3.6% above the reference mean. With a Z-score of 0.43 (66.5th percentile), this represents normal volume ; entorhinal cortex volume measures 4,415 mm³, 27.5% above the reference mean. With a Z-score of 1.48 (93.1th percentile), this represents mild enlargement; fusiform gyrus volume measures 18,110 mm³, 12.4% above the reference mean. With a Z-score of 0.93 (82.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,075 mm³, 5.8% above the reference mean. With a Z-score of 0.52 (69.7th percentile), this represents normal volume . ",
  "text_data": "Age is 82.0 years. Gender is Female. Education: 14 years. MMSE: 29.0. MoCA: 26.0. Logical Memory: 18.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.00 SUVR (normal ); Total tau: 237.00 pg/mL (normal ); Phosphorylated tau: 20.95 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (including hippocampal, whole brain, and key AD-related regions) are within or above the reference range, with no significant atrophy. Cognitive scores (MMSE 29, MoCA 26) are normal for age, and biomarkers (tau, amyloid) are unremarkable. APOE4-negative status further reduces AD risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T20:21:24.165102"
}