{
  "ptid_time": "018_S_4399_2011-12-15",
  "img_path": "/data/qiuhui/data/adni/images/018_S_4399/2011-12-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 19,809 mm³, 29.4% below the reference mean. With a Z-score of -0.67 (25.0th percentile), this represents normal volume ; hippocampal volume measures 7,721 mm³, 8.5% above the reference mean. With a Z-score of 0.78 (78.3th percentile), this represents normal volume ; whole brain volume measures 968,530 mm³, 0.6% below the reference mean. With a Z-score of -0.08 (46.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,252 mm³, 11.5% below the reference mean. With a Z-score of -0.70 (24.1th percentile), this represents normal volume ; fusiform gyrus volume measures 16,288 mm³, 4.3% below the reference mean. With a Z-score of -0.39 (34.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,196 mm³, 10.6% above the reference mean. With a Z-score of 0.92 (82.1th percentile), this represents normal volume . ",
  "text_data": "Age is 77.9 years. Gender is Female. Education: 16 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Dermatologic-Connective Tissue; Musculoskeletal; Allergies or Drug Sensitivities; Malignancy; Major Surgical Procedures. MMSE: 28.0. MoCA: 28.0. Logical Memory: 17.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.04 SUVR (normal ); Amyloid beta: 1554.00 pg/mL (mild elevated); Total tau: 219.00 pg/mL (normal ); Phosphorylated tau: 19.62 pg/mL (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 scores (MMSE: 28, MoCA: 28) are intact, and biomarkers show only mild Aβ elevation with normal tau and AV45.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T00:57:28.678903"
}