{
  "ptid_time": "114_S_2392_2012-02-06",
  "img_path": "/data/qiuhui/data/adni/images/114_S_2392/2012-02-06/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 31,154 mm³, 39.5% above the reference mean. With a Z-score of 0.99 (83.8th percentile), this represents normal volume ; hippocampal volume measures 7,277 mm³, 5.3% below the reference mean. With a Z-score of -0.60 (27.6th percentile), this represents normal volume ; whole brain volume measures 1,080,870 mm³, 5.0% above the reference mean. With a Z-score of 0.63 (73.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,097 mm³, 5.2% above the reference mean. With a Z-score of 0.41 (65.8th percentile), this represents normal volume ; fusiform gyrus volume measures 17,334 mm³, 4.8% below the reference mean. With a Z-score of -0.54 (29.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 22,091 mm³, 7.7% above the reference mean. With a Z-score of 0.68 (75.2th percentile), this represents normal volume . ",
  "text_data": "Age is 64.9 years. Gender is Female. Education: 18 years. MMSE: 29.0. MoCA: 27.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** All brain volume measures (ventricular, hippocampal, whole brain, entorhinal cortex, fusiform gyrus, and middle temporal gyrus) fall within normal ranges based on Z-scores and percentiles. Cognitive scores (MMSE 29, MoCA 27) are within normal limits, and the absence of APOE4 further reduces Alzheimer's risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T11:45:50.887570"
}