{
  "ptid_time": "135_S_4356_2018-08-31",
  "img_path": "/data/qiuhui/data/adni/images/135_S_4356/2018-08-31/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 21,248 mm³, 44.8% below the reference mean. With a Z-score of -1.07 (14.1th percentile), this represents mild atrophy; hippocampal volume measures 8,293 mm³, 9.7% above the reference mean. With a Z-score of 0.95 (82.8th percentile), this represents normal volume ; whole brain volume measures 1,034,860 mm³, 4.1% below the reference mean. With a Z-score of -0.54 (29.6th percentile), this represents normal volume ; entorhinal cortex volume measures 6,409 mm³, 56.3% above the reference mean. With a Z-score of 3.82 (100.0th percentile), this represents profound enlargement; fusiform gyrus volume measures 18,248 mm³, 3.1% below the reference mean. With a Z-score of -0.27 (39.5th percentile), this represents normal volume ; middle temporal gyrus volume measures 21,959 mm³, 2.9% above the reference mean. With a Z-score of 0.26 (60.3th percentile), this represents normal volume . ",
  "text_data": "Age is 75.1 years. Gender is Male. Education: 20 years. MMSE: 30.0. MoCA: 30.0. Logical Memory: 14.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild ventricular enlargement (suggesting mild atrophy) but otherwise normal hippocampal, whole brain, fusiform gyrus, and middle temporal gyrus volumes. The entorhinal cortex volume is paradoxically enlarged, which is unusual for Alzheimer's but may reflect measurement variability or a non-pathological variant. Cognitive scores (MMSE, MoCA) are intact, and there is no APOE4 risk allele.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to the atypical entorhinal cortex enlargement, though cognition remains intact",
  "timestamp": "2025-07-26T15:34:46.556144"
}