Abstract:
:To assess objectively the sensitivity and specificity of low-field-strength (0.064 T) magnetic resonance (MR) imaging, a prospective blind study of 280 examinations was performed to compare low-field-strength MR imaging with computed tomography (CT) and with high-field-strength (1.5-T) MR imaging of the cranium. The sensitivity (defined as the true-positive rate) with high-field MR imaging was superior to that with low-field MR imaging and CT in helping detect overall abnormalities. Sensitivities were generally similar over a broad range of specific cranial central nervous system diseases. Low-field and high-field MR imaging were equivalent in the blind diagnoses of neoplasms and white matter disease, whereas low-field MR and CT were equivalent in the blind diagnoses of contusion, subdural and epidural hematoma, sinus disease, normality, and abnormality. The specificities with low-field MR imaging and CT were substantially better than those with high-field MR imaging.
journal_name
Radiologyjournal_title
Radiologyauthors
Orrison WW Jr,Stimac GK,Stevens EA,LaMasters DL,Espinosa MC,Cobb L,Mettler FA Jrdoi
10.1148/radiology.181.1.1887020subject
Has Abstractpub_date
1991-10-01 00:00:00pages
121-7issue
1eissn
0033-8419issn
1527-1315journal_volume
181pub_type
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