{
  "ptid_time": "023_S_2068_2011-10-11",
  "img_path": "/data/qiuhui/data/adni/images/023_S_2068/2011-10-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 53,771 mm³, 14.4% above the reference mean. With a Z-score of 0.42 (66.2th percentile), this represents normal volume ; hippocampal volume measures 6,819 mm³, 2.1% below the reference mean. With a Z-score of -0.18 (42.7th percentile), this represents normal volume ; whole brain volume measures 1,030,690 mm³, 0.1% above the reference mean. With a Z-score of 0.02 (50.8th percentile), this represents normal volume ; entorhinal cortex volume measures 3,648 mm³, 8.1% below the reference mean. With a Z-score of -0.53 (29.8th percentile), this represents normal volume ; fusiform gyrus volume measures 17,495 mm³, 3.2% below the reference mean. With a Z-score of -0.27 (39.2th percentile), this represents normal volume ; middle temporal gyrus volume measures 17,515 mm³, 13.2% below the reference mean. With a Z-score of -1.18 (11.9th percentile), this represents mild atrophy. ",
  "text_data": "Age is 84.1 years. Gender is Male. Education: 20 years. Handedness: Right. Race: More than one race. Medical history: Psychiatric; Musculoskeletal; Endocrine-Metabolic; Malignancy; Major Surgical Procedures. MMSE: 26.0. MoCA: 20.0. Logical Memory: 10.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows mild atrophy in the middle temporal gyrus (Z-score -1.18, 11.9th percentile), while other regions (hippocampus, entorhinal cortex, fusiform gyrus) are within normal ranges. The MMSE (26) is borderline, but the MoCA (20) suggests mild cognitive impairment. APOE4 carrier status and age increase Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (MoCA strongly suggests MCI, but structural changes are mostly mild except for the middle temporal gyrus; clinical correlation needed for progression risk).",
  "timestamp": "2025-07-26T02:59:26.272071"
}