{
  "ptid_time": "123_S_1300_2007-03-08",
  "img_path": "/data/qiuhui/data/adni/images/123_S_1300/2007-03-08/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 52,113 mm³, 85.7% above the reference mean. With a Z-score of 1.96 (97.5th percentile), this represents moderate enlargement; hippocampal volume measures 6,599 mm³, 7.2% below the reference mean. With a Z-score of -0.66 (25.3th percentile), this represents normal volume ; whole brain volume measures 967,628 mm³, 0.7% below the reference mean. With a Z-score of -0.09 (46.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,448 mm³, 21.1% above the reference mean. With a Z-score of 1.30 (90.2th percentile), this represents mild enlargement; fusiform gyrus volume measures 17,217 mm³, 1.2% above the reference mean. With a Z-score of 0.11 (54.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,288 mm³, 0.6% above the reference mean. With a Z-score of 0.05 (52.1th percentile), this represents normal volume . ",
  "text_data": "Age is 73.4 years. Gender is Female. Education: 12 years. Handedness: Left. Race: White. Medical history: Psychiatric; Head, Eyes, Ears, Nose and Throat; Cardiovascular; Respiratory; Dermatologic-Connective Tissue; Musculoskeletal; Endocrine-Metabolic; Gastrointestinal; Hematopoietic-Lymphatic; Renal-Genitourinary; Allergies or Drug Sensitivities; Smoking; Malignancy; Major Surgical Procedures. MMSE: 28.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is moderately enlarged (85.7% above mean, Z=1.96), which can indicate atrophy, but hippocampal volume is normal (Z=-0.66). Whole brain and other regional volumes are within normal ranges. The MMSE score of 28 is intact, and APOE4-negative status lowers Alzheimer's risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (ventricular enlargement raises some concern, but other markers and cognitive performance suggest normal aging)",
  "timestamp": "2025-07-26T12:28:25.979433"
}