Chemical-shift micro-imaging of subcutaneous lesions.
A chemical-shift imaging technique was used for the study of small subcutaneous lesions. This study concerns micro-imaging of two females suffering from a tenosynovial giant cell tumor and an epidermal cyst. High-resolution water, fat and chemical-shift artifact-free images were obtained on a whole-body MR unit (1.5 T) equipped with a 23-mm microscopy surface coil and standard gradients (23 mT/m). A significant improvement in signal-to-noise ratio was achieved by reducing the receiver bandwidth to values below +/-10 kHz. The image data sets were acquired with resolution 0.1 x 0.13 mm in the plane, slice thickness 0.5 mm and with acquisition time less than 3 min. Spatial resolution, fat suppression, image texture and edge delineation were improved on spectroscopic images compared with those on conventional MR images.
Weis
J
J
Department of Radiology, Ing. 24, University Hospital, SE-751 85 Uppsala, Sweden. jan.weis@radiol.uu.se
Aström
G
G
Vinnars
B
B
Wanders
A
A
Ahlström
H
H
D000328:Adult; D000465:Algorithms; D004814:Epidermal Cyst / Q000473:pathology*; D005260:Female; D005870:Giant Cell Tumors / Q000473:pathology*; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D012871:Skin Diseases / Q000473:pathology*; D012983:Soft Tissue Neoplasms / Q000473:pathology*; D013583:Synovial Membrane / Q000473:pathology; D013710:Tendons / Q000473:pathology