{
  "ptid_time": "126_S_0405_2006-06-14",
  "img_path": "/data/qiuhui/data/adni/images/126_S_0405/2006-06-14/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 18,479 mm³, 52.0% below the reference mean. With a Z-score of -1.25 (10.6th percentile), this represents mild atrophy; hippocampal volume measures 8,151 mm³, 7.8% above the reference mean. With a Z-score of 0.76 (77.8th percentile), this represents normal volume ; whole brain volume measures 1,117,920 mm³, 3.6% above the reference mean. With a Z-score of 0.46 (67.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,508 mm³, 14.5% below the reference mean. With a Z-score of -0.98 (16.4th percentile), this represents normal volume ; fusiform gyrus volume measures 18,897 mm³, 0.3% above the reference mean. With a Z-score of 0.03 (51.1th percentile), this represents normal volume ; middle temporal gyrus volume measures 26,803 mm³, 25.6% above the reference mean. With a Z-score of 2.30 (98.9th percentile), this represents significant enlargement. ",
  "text_data": "Age is 76.1 years. Gender is Male. Education: 7 years. Handedness: Right. Race: White. Medical history: Head, Eyes, Ears, Nose and Throat; Dermatologic-Connective Tissue; Musculoskeletal; Gastrointestinal; Renal-Genitourinary; Allergies or Drug Sensitivities; Smoking; Major Surgical Procedures. MMSE: 29.0. Logical Memory: 8.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The data shows mild ventricular atrophy (Z-score -1.25) and slightly reduced entorhinal cortex volume (Z-score -0.98), but hippocampal, whole brain, fusiform gyrus, and middle temporal gyrus volumes are normal or even enlarged. The MMSE score of 29 is within the normal range, and the absence of APOE4 reduces genetic risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (mild atrophy in some regions but no significant cognitive impairment)",
  "timestamp": "2025-07-26T12:35:29.925352"
}