{
  "ptid_time": "031_S_0867_2008-04-07",
  "img_path": "/data/qiuhui/data/adni/images/031_S_0867/2008-04-07/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 105,890 mm³, 174.9% above the reference mean. With a Z-score of 4.19 (100.0th percentile), this represents profound enlargement; hippocampal volume measures 6,731 mm³, 11.0% below the reference mean. With a Z-score of -1.07 (14.3th percentile), this represents mild atrophy; whole brain volume measures 977,586 mm³, 9.4% below the reference mean. With a Z-score of -1.22 (11.0th percentile), this represents mild atrophy; entorhinal cortex volume measures 3,983 mm³, 2.9% below the reference mean. With a Z-score of -0.19 (42.3th percentile), this represents normal volume ; fusiform gyrus volume measures 15,162 mm³, 19.5% below the reference mean. With a Z-score of -1.66 (4.8th percentile), this represents moderate atrophy; middle temporal gyrus volume measures 18,671 mm³, 12.5% below the reference mean. With a Z-score of -1.12 (13.1th percentile), this represents mild atrophy. ",
  "text_data": "Age is 73.3 years. Gender is Male. Education: 16 years. MMSE: 29.0. APOEε4 alleles: 0.0. ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "Reasoning: The patient shows profound ventricular enlargement (Z-score 4.19) and mild-to-moderate atrophy in multiple brain regions (hippocampus, whole brain, fusiform gyrus, middle temporal gyrus), which are concerning for neurodegenerative changes. However, cognitive performance (MMSE 29) remains intact, and there is no APOE4 risk allele.  \nDiagnosis: **Mild Cognitive Impairment (MCI)**  \nConfidence: **Medium** (Structural atrophy is significant, but cognitive scores are normal; longitudinal follow-up would help clarify progression.)",
  "timestamp": "2025-07-26T04:39:07.759085"
}