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Fat‐saturated contrast‐enhanced T1‐weighted MRI in evaluation of osteosarcoma and ewing sarcoma
Author(s) -
Gronemeyer Suzanne A.,
Kauffman William M.,
Rocha Manoel S.,
Steen R. Grant,
Fletcher Barry D.
Publication year - 1997
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880070321
Subject(s) - osteosarcoma , sarcoma , medicine , neurovascular bundle , soft tissue , magnetic resonance imaging , nuclear medicine , radiology , pathology
To assess contrast‐enhanced (C+), fat‐saturated (FatSat), T1‐weighted (T1W) imaging in the characterization of the soft tissue mass associated with primary bone tumors, we compared it with T2‐weighted (T2W) imaging in patients with osteosarcoma ( n = 36) and Ewing sarcoma family of tumors (Ewing sarcoma; n = 11). Periosseous tumor compared with normal muscle had greater contrast‐to‐noise ratio (CNR) on the FatSat T1W C+ image than on T2W for 81% (38/47; P < .0001) of patients. The CNR of periosseous tumor compared with subcutaneous fat was greater on FatSat T1W C+ for 98% (46/47; P < .0001). Radiologists found it easier to evaluate neurovascular bundle proximity to tumor with FatSat T1W C+ images than with T2W for 64% of patients (30/47; P < .0001). They judged FatSat T1W C+ superior to T2W for periosseous tumor conspicuity and visualization of soft tissue necrosis in 62% (29/47; P < .0001). In patients with osteosarcoma or Ewing sarcoma, FatSat T1W C+ imaging may replace T2W imaging for soft tissue mass evaluation, especially if contrast is being used for dynamic enhancement.