{
  "ptid_time": "135_S_4446_2012-08-09",
  "img_path": "/data/qiuhui/data/adni/images/135_S_4446/2012-08-09/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 15,754 mm³, 29.5% below the reference mean. With a Z-score of -0.74 (23.0th percentile), this represents normal volume ; hippocampal volume measures 7,255 mm³, 5.6% below the reference mean. With a Z-score of -0.63 (26.5th percentile), this represents normal volume ; whole brain volume measures 983,638 mm³, 4.4% below the reference mean. With a Z-score of -0.55 (29.1th percentile), this represents normal volume ; entorhinal cortex volume measures 4,556 mm³, 17.0% above the reference mean. With a Z-score of 1.32 (90.7th percentile), this represents mild enlargement; fusiform gyrus volume measures 21,979 mm³, 20.7% above the reference mean. With a Z-score of 2.33 (99.0th percentile), this represents significant enlargement; middle temporal gyrus volume measures 17,724 mm³, 13.6% below the reference mean. With a Z-score of -1.21 (11.3th percentile), this represents mild atrophy. ",
  "text_data": "Age is 68.9 years. Gender is Female. Education: 15 years. MMSE: 30.0. MoCA: 28.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** The brain volume measurements show normal hippocampal and whole-brain volumes, with mild atrophy in the middle temporal gyrus but enlargement in the entorhinal cortex and fusiform gyrus. Cognitive scores (MMSE 30, MoCA 28) are within normal ranges, and there is no APOE4 risk allele.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mixed findings in regional volumes, but strong cognitive performance and lack of genetic risk support normal cognition)",
  "timestamp": "2025-07-26T15:36:02.028062"
}