{
  "ptid_time": "128_S_0715_2006-07-18",
  "img_path": "/data/qiuhui/data/adni/images/128_S_0715/2006-07-18/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 55,460 mm³, 50.0% above the reference mean. With a Z-score of 1.35 (91.2th percentile), this represents mild enlargement; hippocampal volume measures 6,194 mm³, 4.6% below the reference mean. With a Z-score of -0.37 (35.5th percentile), this represents normal volume ; whole brain volume measures 939,624 mm³, 1.2% above the reference mean. With a Z-score of 0.15 (55.9th percentile), this represents normal volume ; entorhinal cortex volume measures 3,712 mm³, 7.2% above the reference mean. With a Z-score of 0.39 (65.1th percentile), this represents normal volume ; fusiform gyrus volume measures 14,030 mm³, 12.9% below the reference mean. With a Z-score of -0.97 (16.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,231 mm³, 6.7% above the reference mean. With a Z-score of 0.59 (72.4th percentile), this represents normal volume . ",
  "text_data": "Age is 80.0 years. Gender is Female. Education: 13 years. Handedness: Right. Race: White. Medical history: Respiratory; Alcohol Abuse; Major Surgical Procedures. MMSE: 24.0. Logical Memory: 4.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The ventricular volume is mildly enlarged (50% above reference mean, Z-score 1.35), which can be associated with atrophy, but hippocampal volume is only slightly reduced (4.6% below mean, Z-score -0.37) and within normal range. The MMSE score of 24 is borderline but not strongly indicative of dementia, and the absence of APOE4 reduces genetic risk. Other brain regions (whole brain, entorhinal cortex, fusiform gyrus, middle temporal gyrus) are largely normal.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (Ventricular enlargement and borderline MMSE suggest possible cognitive decline, but other structures are preserved, and APOE4-negative status lowers Alzheimer's risk.)",
  "timestamp": "2025-07-26T13:48:52.666336"
}