{
  "ptid_time": "116_S_0370_2006-04-24",
  "img_path": "/data/qiuhui/data/adni/images/116_S_0370/2006-04-24/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 24,880 mm³, 11.4% below the reference mean. With a Z-score of -0.26 (39.7th percentile), this represents normal volume ; hippocampal volume measures 7,945 mm³, 11.7% above the reference mean. With a Z-score of 1.07 (85.8th percentile), this represents mild enlargement; whole brain volume measures 967,608 mm³, 0.7% below the reference mean. With a Z-score of -0.09 (46.4th percentile), this represents normal volume ; entorhinal cortex volume measures 5,430 mm³, 47.8% above the reference mean. With a Z-score of 2.94 (99.8th percentile), this represents significant enlargement; fusiform gyrus volume measures 18,497 mm³, 8.7% above the reference mean. With a Z-score of 0.79 (78.6th percentile), this represents normal volume ; middle temporal gyrus volume measures 19,969 mm³, 4.2% above the reference mean. With a Z-score of 0.36 (64.1th percentile), this represents normal volume . ",
  "text_data": "Age is 74.5 years. Gender is Female. Education: 16 years. Handedness: Right. Race: Asian. Medical history: Head, Eyes, Ears, Nose and Throat; Endocrine-Metabolic; Allergies or Drug Sensitivities; Major Surgical Procedures. MMSE: 25.0. Logical Memory: 0.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: AD.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal or above-average volumes in all regions, including the hippocampus and entorhinal cortex, which are typically affected in Alzheimer's. The MMSE score of 25 is slightly below normal but not indicative of dementia, and the absence of APOE4 reduces genetic risk.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to the slightly low MMSE score, but structural findings strongly favor normal cognition)",
  "timestamp": "2025-07-26T11:52:20.203189"
}