{
  "ptid_time": "031_S_2018_2010-09-23",
  "img_path": "/data/qiuhui/data/adni/images/031_S_2018/2010-09-23/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 42,820 mm³, 52.6% above the reference mean. With a Z-score of 1.20 (88.6th percentile), this represents mild enlargement; hippocampal volume measures 7,774 mm³, 9.3% above the reference mean. With a Z-score of 0.85 (80.2th percentile), this represents normal volume ; whole brain volume measures 1,004,820 mm³, 3.1% above the reference mean. With a Z-score of 0.39 (65.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,286 mm³, 16.7% above the reference mean. With a Z-score of 1.02 (84.7th percentile), this represents mild enlargement; fusiform gyrus volume measures 16,214 mm³, 4.7% below the reference mean. With a Z-score of -0.43 (33.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,531 mm³, 1.9% above the reference mean. With a Z-score of 0.16 (56.5th percentile), this represents normal volume . ",
  "text_data": "Age is 76.4 years. Gender is Female. Education: 18 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Cardiovascular; Musculoskeletal; Endocrine-Metabolic; Allergies or Drug Sensitivities; Malignancy; Major Surgical Procedures. MMSE: 29.0. MoCA: 26.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.05 SUVR (normal ); Total tau: 223.10 pg/mL (normal ); Phosphorylated tau: 17.92 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild ventricular enlargement but otherwise normal or above-average volumes in key regions (hippocampus, entorhinal cortex, whole brain). Cognitive scores (MMSE 29, MoCA 26) are within normal ranges for age, and biomarkers (tau, AV45) are unremarkable. No APOE4 risk allele is present.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High  \n\n*Note: Mild ventricular enlargement can occur with aging and does not necessarily indicate pathology given the absence of cognitive deficits or biomarker abnormalities.*",
  "timestamp": "2025-07-26T04:41:05.503416"
}