{
  "ptid_time": "341_S_6686_2019-02-20",
  "img_path": "/data/qiuhui/data/adni/images/341_S_6686/2019-02-20/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 49,497 mm³, 28.5% above the reference mean. With a Z-score of 0.68 (75.3th percentile), this represents normal volume ; hippocampal volume measures 7,172 mm³, 5.1% below the reference mean. With a Z-score of -0.50 (30.9th percentile), this represents normal volume ; whole brain volume measures 1,098,240 mm³, 1.7% above the reference mean. With a Z-score of 0.23 (59.0th percentile), this represents normal volume ; entorhinal cortex volume measures 4,166 mm³, 1.6% above the reference mean. With a Z-score of 0.11 (54.3th percentile), this represents normal volume ; fusiform gyrus volume measures 19,133 mm³, 1.6% above the reference mean. With a Z-score of 0.13 (55.3th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,978 mm³, 3.0% above the reference mean. With a Z-score of 0.27 (60.6th percentile), this represents normal volume . ",
  "text_data": "Age is 79.2 years. Gender is Male. Education: 16 years. Handedness: Right. Race: Asian. MMSE: 26.0. MoCA: 20.0. Logical Memory: 0.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volumes (hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) are all within normal ranges, with no significant atrophy. However, the MoCA score (20/30) suggests mild cognitive impairment, while the MMSE (26/30) is borderline. The absence of APOE4 reduces genetic risk, but the cognitive scores are concerning.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (due to normal imaging but clinically significant cognitive decline on MoCA)",
  "timestamp": "2025-07-26T17:25:03.075455"
}