{
  "ptid_time": "012_S_4643_2012-04-11",
  "img_path": "/data/qiuhui/data/adni/images/012_S_4643/2012-04-11/t1.nii.gz",
  "img_finding": "Image findings: ventricular volume measures 27,393 mm³, 22.6% above the reference mean. With a Z-score of 0.57 (71.4th percentile), this represents normal volume ; hippocampal volume measures 7,590 mm³, 1.2% below the reference mean. With a Z-score of -0.14 (44.5th percentile), this represents normal volume ; whole brain volume measures 1,033,900 mm³, 0.5% above the reference mean. With a Z-score of 0.06 (52.3th percentile), this represents normal volume ; entorhinal cortex volume measures 3,889 mm³, 0.1% below the reference mean. With a Z-score of -0.01 (49.7th percentile), this represents normal volume ; fusiform gyrus volume measures 20,819 mm³, 14.3% above the reference mean. With a Z-score of 1.61 (94.7th percentile), this represents moderate enlargement; middle temporal gyrus volume measures 19,551 mm³, 4.7% below the reference mean. With a Z-score of -0.42 (33.7th percentile), this represents normal volume . ",
  "text_data": "Age is 65.1 years. Gender is Female. Education: 16 years. Handedness: Right. Race: White. Medical history: Psychiatric; Neurologic; Cardiovascular; Musculoskeletal; Gastrointestinal; Renal-Genitourinary; Allergies or Drug Sensitivities; Major Surgical Procedures. MMSE: 29.0. MoCA: 29.0. Logical Memory: 9.0. APOEε4 alleles: 0.0. Biomarker levels: Florbetapir (AV45): 1.01 SUVR (normal ); Total tau: 187.40 pg/mL (normal ); Phosphorylated tau: 16.16 pg/mL (normal ). ",
  "true_diagnosis": "Diagnosis: CN.",
  "gpt_diagnosis": "**Reasoning:** All brain volumes (ventricular, hippocampal, whole brain, entorhinal cortex, and middle temporal gyrus) are within normal ranges, with only the fusiform gyrus showing moderate enlargement, which is not typically associated with Alzheimer's pathology. Cognitive scores (MMSE and MoCA) are high, biomarkers (T-tau, P-tau, AV45) are normal, and there is no APOE4 risk allele.  \n\n**Diagnosis:** CN (Cognitively Normal)  \n**Confidence:** High",
  "timestamp": "2025-07-25T23:14:56.890874"
}