{
  "ptid_time": "006_S_0498_2010-12-07",
  "img_path": "/data/qiuhui/data/adni/images/006_S_0498/2010-12-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,957 mm³, 6.3% above the reference mean. With a Z-score of 0.15 (56.0th percentile), this represents normal volume ; hippocampal volume measures 7,158 mm³, 5.3% below the reference mean. With a Z-score of -0.52 (30.2th percentile), this represents normal volume ; whole brain volume measures 1,065,990 mm³, 1.2% below the reference mean. With a Z-score of -0.16 (43.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,038 mm³, 1.5% below the reference mean. With a Z-score of -0.10 (45.9th percentile), this represents normal volume ; fusiform gyrus volume measures 18,653 mm³, 1.0% below the reference mean. With a Z-score of -0.08 (46.7th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,177 mm³, 5.4% below the reference mean. With a Z-score of -0.49 (31.2th percentile), this represents normal volume . ",
  "text_data": "Age is 74.3 years. Gender is Male. Education: 12 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Gastrointestinal; Smoking; Major Surgical Procedures. MMSE: 28.0. MoCA: 29.0. Logical Memory: 17.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 0.93 SUVR (mild reduced); Total tau: 277.60 pg/mL (normal ); Phosphorylated tau: 25.87 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE 28, MoCA 29) are intact, and CSF biomarkers (T-tau, P-tau) are normal, though AV45 shows mild reduction (possible early amyloid deposition).  \n\n**Diagnosis:** **CN (Cognitively Normal)**  \n**Confidence:** **Medium** (due to mild AV45 reduction, but no significant structural or cognitive impairment)",
  "timestamp": "2025-07-25T21:26:46.453491"
}