{
  "ptid_time": "073_S_4614_2012-03-16",
  "img_path": "/data/qiuhui/data/adni/images/073_S_4614/2012-03-16/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 14,510 mm³, 35.0% below the reference mean. With a Z-score of -0.88 (19.0th percentile), this represents normal volume ; hippocampal volume measures 6,852 mm³, 10.8% below the reference mean. With a Z-score of -1.22 (11.2th percentile), this represents mild atrophy; whole brain volume measures 982,202 mm³, 4.6% below the reference mean. With a Z-score of -0.57 (28.5th percentile), this represents normal volume ; entorhinal cortex volume measures 3,493 mm³, 10.3% below the reference mean. With a Z-score of -0.80 (21.3th percentile), this represents normal volume ; fusiform gyrus volume measures 17,312 mm³, 4.9% below the reference mean. With a Z-score of -0.56 (28.9th percentile), this represents normal volume ; middle temporal gyrus volume measures 20,042 mm³, 2.3% below the reference mean. With a Z-score of -0.21 (41.8th percentile), this represents normal volume . ",
  "text_data": "Age is 67.7 years. Gender is Female. Education: 20 years. Handedness: Left. Race: White. Medical history: Psychiatric; Cardiovascular; Respiratory; Musculoskeletal; Drug Abuse; Smoking; Major Surgical Procedures. MMSE: 28.0. MoCA: 28.0. Logical Memory: 11.0. APOEε4 alleles: 1.0. Biomarker levels: Florbetapir (AV45): 1.16 SUVR (normal ). ",
  "true_diagnosis": "Diagnosis: MCI.",
  "gpt_diagnosis": "**Reasoning:** The hippocampal volume shows mild atrophy (Z-score -1.22, 11.2th percentile), while other brain regions are within normal ranges. Cognitive scores (MMSE 28, MoCA 28) are intact, and amyloid PET (AV45) is normal. Mild hippocampal atrophy in isolation, without cognitive impairment or amyloid pathology, is nonspecific.  \n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** Medium (due to mild hippocampal atrophy but preserved cognition and normal amyloid)",
  "timestamp": "2025-07-26T09:50:05.092509"
}