{
  "ptid_time": "131_S_0384_2007-06-19",
  "img_path": "/data/qiuhui/data/adni/images/131_S_0384/2007-06-19/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 32,847 mm³, 30.1% below the reference mean. With a Z-score of -0.88 (19.1th percentile), this represents normal volume ; hippocampal volume measures 6,722 mm³, 3.5% below the reference mean. With a Z-score of -0.31 (38.0th percentile), this represents normal volume ; whole brain volume measures 1,001,910 mm³, 2.6% below the reference mean. With a Z-score of -0.35 (36.4th percentile), this represents normal volume ; entorhinal cortex volume measures 4,305 mm³, 8.5% above the reference mean. With a Z-score of 0.55 (71.0th percentile), this represents normal volume ; fusiform gyrus volume measures 15,225 mm³, 15.7% below the reference mean. With a Z-score of -1.36 (8.7th percentile), this represents mild atrophy; middle temporal gyrus volume measures 18,397 mm³, 8.8% below the reference mean. With a Z-score of -0.79 (21.5th percentile), this represents normal volume . ",
  "text_data": "Age is 80.8 years. Gender is Male. Education: 14 years. MMSE: 30.0. Logical Memory: 16.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show mostly normal values, with only mild atrophy in the fusiform gyrus (Z-score -1.36, 8.7th percentile). The hippocampal, whole brain, and entorhinal cortex volumes are within normal ranges. The MMSE score of 30/30 indicates no cognitive impairment, and the absence of APOE4 reduces genetic risk for Alzheimer’s.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T15:01:10.539509"
}