{
  "ptid_time": "027_S_0120_2011-02-07",
  "img_path": "/data/qiuhui/data/adni/images/027_S_0120/2011-02-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,963 mm³, 43.0% below the reference mean. With a Z-score of -1.03 (15.2th percentile), this represents mild atrophy; hippocampal volume measures 7,262 mm³, 3.9% below the reference mean. With a Z-score of -0.38 (35.1th percentile), this represents normal volume ; whole brain volume measures 1,077,400 mm³, 0.2% below the reference mean. With a Z-score of -0.02 (49.0th percentile), this represents normal volume ; entorhinal cortex volume measures 3,773 mm³, 8.0% below the reference mean. With a Z-score of -0.54 (29.4th percentile), this represents normal volume ; fusiform gyrus volume measures 19,129 mm³, 1.5% above the reference mean. With a Z-score of 0.13 (55.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,040 mm³, 1.4% below the reference mean. With a Z-score of -0.13 (45.0th percentile), this represents normal volume . ",
  "text_data": "Age is 77.0 years. Gender is Male. Education: 20 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Dermatologic-Connective Tissue; Musculoskeletal; Endocrine-Metabolic; Gastrointestinal; Renal-Genitourinary; Allergies or Drug Sensitivities; Smoking; Malignancy; Major Surgical Procedures. MMSE: 28.0. MoCA: 26.0. Logical Memory: 16.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.04 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild ventricular atrophy but otherwise normal volumes in key regions (hippocampus, entorhinal cortex, fusiform gyrus, middle temporal gyrus). Cognitive scores (MMSE 28, MoCA 26) are within normal ranges, and amyloid PET (AV45) is normal. APOE4 carrier status increases Alzheimer’s risk but does not confirm pathology.  \n\nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to mild ventricular atrophy and APOE4 status, but normal cognition and amyloid scans suggest no current impairment)",
  "timestamp": "2025-07-26T03:30:15.628144"
}