{
  "ptid_time": "109_S_0967_2008-12-03",
  "img_path": "/data/qiuhui/data/adni/images/109_S_0967/2008-12-03/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 40,803 mm³, 5.9% above the reference mean. With a Z-score of 0.14 (55.7th percentile), this represents normal volume ; hippocampal volume measures 7,624 mm³, 0.9% above the reference mean. With a Z-score of 0.08 (53.3th percentile), this represents normal volume ; whole brain volume measures 974,690 mm³, 9.7% below the reference mean. With a Z-score of -1.26 (10.4th percentile), this represents mild atrophy; entorhinal cortex volume measures 4,318 mm³, 5.3% above the reference mean. With a Z-score of 0.36 (64.0th percentile), this represents normal volume ; fusiform gyrus volume measures 15,711 mm³, 16.6% below the reference mean. With a Z-score of -1.41 (7.9th percentile), this represents mild atrophy; middle temporal gyrus volume measures 19,793 mm³, 7.2% below the reference mean. With a Z-score of -0.65 (25.7th percentile), this represents normal volume . ",
  "text_data": "Age is 78.8 years. Gender is Male. Education: 20 years. MMSE: 29.0. Logical Memory: 11.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The patient shows mild atrophy in whole brain and fusiform gyrus volumes, but hippocampal, entorhinal cortex, and ventricular volumes are within normal ranges. The MMSE score of 29 is normal, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild atrophy in some regions but no significant cognitive impairment or genetic risk)",
  "timestamp": "2025-07-26T11:28:54.099024"
}