{
  "ptid_time": "023_S_6702_2019-03-12",
  "img_path": "/data/qiuhui/data/adni/images/023_S_6702/2019-03-12/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 12,380 mm³, 44.6% below the reference mean. With a Z-score of -1.12 (13.2th percentile), this represents mild atrophy; hippocampal volume measures 7,450 mm³, 3.1% below the reference mean. With a Z-score of -0.34 (36.6th percentile), this represents normal volume ; whole brain volume measures 997,789 mm³, 3.0% below the reference mean. With a Z-score of -0.38 (35.2th percentile), this represents normal volume ; entorhinal cortex volume measures 4,009 mm³, 3.0% above the reference mean. With a Z-score of 0.23 (59.1th percentile), this represents normal volume ; fusiform gyrus volume measures 20,444 mm³, 12.3% above the reference mean. With a Z-score of 1.38 (91.6th percentile), this represents mild enlargement; middle temporal gyrus volume measures 17,612 mm³, 14.2% below the reference mean. With a Z-score of -1.26 (10.4th percentile), this represents mild atrophy. ",
  "text_data": "Age is 64.4 years. Gender is Female. Education: 12 years. Handedness: Right. Race: White. MMSE: 28.0. MoCA: 24.0. Logical Memory: 6.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.20 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The brain imaging shows mild atrophy in the ventricular volume and middle temporal gyrus, but other regions (hippocampus, whole brain, entorhinal cortex) are within normal ranges. The MMSE (28/30) is normal, but the MoCA (24/30) suggests mild cognitive impairment. No APOE4 or amyloid pathology (AV45 normal) reduces Alzheimer's risk.  \n\n**Diagnosis:** **Mild Cognitive Impairment (MCI)**  \n**Confidence:** **Medium** (MoCA supports MCI, but imaging findings are mixed and lack strong Alzheimer's biomarkers).",
  "timestamp": "2025-07-26T03:11:07.059178"
}