{
  "ptid_time": "021_S_0276_2006-09-29",
  "img_path": "/data/qiuhui/data/adni/images/021_S_0276/2006-09-29/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 23,948 mm³, 37.8% below the reference mean. With a Z-score of -0.91 (18.2th percentile), this represents normal volume ; hippocampal volume measures 9,131 mm³, 20.8% above the reference mean. With a Z-score of 2.03 (97.9th percentile), this represents significant enlargement; whole brain volume measures 1,208,010 mm³, 11.9% above the reference mean. With a Z-score of 1.55 (93.9th percentile), this represents moderate enlargement; entorhinal cortex volume measures 5,090 mm³, 24.1% above the reference mean. With a Z-score of 1.64 (94.9th percentile), this represents moderate enlargement; fusiform gyrus volume measures 20,894 mm³, 10.9% above the reference mean. With a Z-score of 0.93 (82.4th percentile), this represents normal volume ; middle temporal gyrus volume measures 24,971 mm³, 17.0% above the reference mean. With a Z-score of 1.53 (93.7th percentile), this represents moderate enlargement. ",
  "text_data": "Age is 71.4 years. Gender is Male. Education: 18 years. MMSE: 30.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain volume data shows significant to moderate enlargement in key regions (hippocampus, whole brain, entorhinal cortex, middle temporal gyrus), which is atypical for Alzheimer's disease (AD) where atrophy is expected. The MMSE score of 30 is normal, and the absence of APOE4 further reduces AD risk.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-26T01:24:25.859765"
}