{
  "ptid_time": "018_S_5262_2013-08-12",
  "img_path": "/data/qiuhui/data/adni/images/018_S_5262/2013-08-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 25,576 mm³, 8.9% below the reference mean. With a Z-score of -0.20 (41.9th percentile), this represents normal volume ; hippocampal volume measures 6,968 mm³, 2.1% below the reference mean. With a Z-score of -0.19 (42.5th percentile), this represents normal volume ; whole brain volume measures 869,048 mm³, 10.8% below the reference mean. With a Z-score of -1.36 (8.6th percentile), this represents mild atrophy; entorhinal cortex volume measures 4,174 mm³, 13.6% above the reference mean. With a Z-score of 0.84 (79.9th percentile), this represents normal volume ; fusiform gyrus volume measures 13,418 mm³, 21.1% below the reference mean. With a Z-score of -1.92 (2.7th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 17,454 mm³, 8.9% below the reference mean. With a Z-score of -0.78 (21.9th percentile), this represents normal volume . ",
  "text_data": "Age is 73.5 years. Gender is Female. Education: 17 years. Handedness: Left. Race: White. Medical history: Psychiatric; Cardiovascular; Renal-Genitourinary. MMSE: 29.0. MoCA: 27.0. Logical Memory: 18.0. APOEε4 alleles: 1.0. ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "Reasoning: The brain imaging shows mild to moderate atrophy in the whole brain and fusiform gyrus, but other regions (hippocampus, entorhinal cortex, middle temporal gyrus) are within normal ranges. Cognitive scores (MMSE 29, MoCA 27) are near the upper limits of normal, suggesting no significant impairment. APOE4 carrier status increases Alzheimer’s risk but does not confirm pathology.  \nDiagnosis: CN (Cognitively Normal)  \nConfidence: Medium (due to some atrophy but preserved cognition and normal key regions like the hippocampus)",
  "timestamp": "2025-07-26T01:02:30.007283"
}