{
  "ptid_time": "094_S_4649_2012-08-21",
  "img_path": "/data/qiuhui/data/adni/images/094_S_4649/2012-08-21/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 22,305 mm³, 25.7% below the reference mean. With a Z-score of -0.61 (27.1th percentile), this represents normal volume ; hippocampal volume measures 9,700 mm³, 20.8% above the reference mean. With a Z-score of 2.08 (98.1th percentile), this represents significant enlargement; whole brain volume measures 1,264,210 mm³, 11.4% above the reference mean. With a Z-score of 1.62 (94.7th percentile), this represents moderate enlargement; entorhinal cortex volume measures 4,795 mm³, 12.5% above the reference mean. With a Z-score of 0.86 (80.6th percentile), this represents normal volume ; fusiform gyrus volume measures 22,435 mm³, 12.7% above the reference mean. With a Z-score of 1.05 (85.4th percentile), this represents mild enlargement; middle temporal gyrus volume measures 27,353 mm³, 22.0% above the reference mean. With a Z-score of 1.82 (96.5th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 65.4 years. Gender is Male. Education: 18 years. Handedness: Right. Race: White. Medical history: Psychiatric; Cardiovascular; Dermatologic-Connective Tissue; Musculoskeletal; Gastrointestinal; Renal-Genitourinary; Smoking; Major Surgical Procedures. MMSE: 30.0. MoCA: 26.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 0.96 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows significant enlargement in the hippocampus and moderate enlargement in the whole brain and middle temporal gyrus, which is atypical for Alzheimer's disease (AD) or neurodegeneration. Cognitive scores (MMSE 30, MoCA 26) are within normal limits, and amyloid PET (AV45) is normal, ruling out AD pathology. The APOE4-negative status further reduces AD risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T10:33:11.480031"
}