{
  "ptid_time": "010_S_0419_2011-07-15",
  "img_path": "/data/qiuhui/data/adni/images/010_S_0419/2011-07-15/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 29,608 mm³, 23.1% below the reference mean. With a Z-score of -0.55 (29.0th percentile), this represents normal volume ; hippocampal volume measures 11,207 mm³, 48.3% above the reference mean. With a Z-score of 4.71 (100.0th percentile), this represents profound enlargement; whole brain volume measures 1,093,180 mm³, 1.3% above the reference mean. With a Z-score of 0.17 (56.6th percentile), this represents normal volume ; entorhinal cortex volume measures 4,124 mm³, 0.6% above the reference mean. With a Z-score of 0.04 (51.5th percentile), this represents normal volume ; fusiform gyrus volume measures 20,314 mm³, 7.8% above the reference mean. With a Z-score of 0.67 (74.8th percentile), this represents normal volume ; middle temporal gyrus volume measures 23,017 mm³, 7.9% above the reference mean. With a Z-score of 0.71 (76.0th percentile), this represents normal volume . ",
  "text_data": "Age is 75.2 years. Gender is Male. Education: 18 years. Handedness: Left. Race: White. Medical history: Gastrointestinal; Renal-Genitourinary; Allergies or Drug Sensitivities; Smoking; Major Surgical Procedures. MMSE: 30.0. MoCA: 30.0. Logical Memory: 20.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.05 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or above-normal volumes in all regions, including the hippocampus, which is profoundly enlarged (Z-score 4.71). Cognitive scores (MMSE 30, MoCA 30) are intact, and amyloid PET (AV45) is normal. No evidence of neurodegeneration or cognitive impairment is present.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T22:30:21.417390"
}