MR imaging of degenerative disc disease in the lumbar spine with ultrashort TE pulse sequences.
OBJECTIVE
The objective of this study was to assess the feasibility of using ultrashort TE (UTE) pulse sequences to image the lumbar spine.


METHODS
Pulse sequences of TE=0.08 ms were used to image the lumbar spine in 5 normal subjects and 14 patients with degenerative disease. Contrast enhancement was administered in 11 cases.


RESULTS
The sequences showed high signal in the anterior and posterior longitudinal ligaments, the cartilaginous end plate, the annulus fibrosus, the ligamentum flavum, interspinous ligaments and insertions of ligaments. Normal contrast enhancement was seen in these structures. Enhancement of hypertrophied ligaments and scar tissue was readily identified. Long T2 suppression techniques were useful in distinguishing enhancement of scar tissue from veins. Enhancement in discs was more obvious than with conventional sequences. In a case of thalassaemia bands of high signal were seen in the intervertebral discs parallel to the end plates.


CONCLUSIONS
The UTE sequences offer new options for visualizing discs, scar tissue, ligaments and other structures of the lumbar spine in health and disease.
Gatehouse
Peter D
PD
The Cardiac Magnetic Resonance Unit, Royal Brompton Hospital, Sydney Street, SW3 6NP, London, England.
He
Taigang
T
Hughes
Sean P F
SP
Bydder
Graeme M
GM
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007405:Intervertebral Disc Displacement / Q000175:diagnosis*; D008159:Lumbar Vertebrae / Q000473:pathology; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012815:Signal Processing, Computer-Assisted