Author/Editor		Sodja, Eveline
Title		Dinamika paramagnetnega kontrastnega sredstva (Gd-DTPA) pri magnetnoresonančni artrografiji ramenskega sklepa
Type		monografija
Place		Ljubljana
Publisher		Medicinska fakulteta
Publication year		2002
Volume		str. 55
Language		slo
Abstract		Magnetic resonance arthrography (MRA) is the most accurate diagnostic imaging modality for shoulder joint pathology. MRA is performed by injecting a 2 mmol/L solution of a paramagnetic contrast medium, Gd-DTPA, into the shoulder joint. Optimal studies of the shoulder joint result if imaging is performed at the time of maximal contrast due to the presence of Gd-DTPA. In our study, we sought to determine the optimal imaging time for an MRA by evaluating the temporal behaviour of Gd-DTPA after intra-articular injection into the shoulder joint. 22 patients referred for MRA with suspected rotator cuff tears or labral injury were studied using a GE (gradient echo) sequence (FISP, TR 40 ms, TE 10 ms, flip angle 40°). Imaging was performed 5 minutes, 2 hours, 6 hours and 24 hours after injection of Gd-DTPA. Using special software programs, signal intensity values were assessed. Also, all shoulder joints were qualitatively evaluated for pathology using SE (spin echo) and GE images. Patient tolerance to the administration of the paramagnetic contrast medium was surveyed. Maximal signal intensity was measured immediately after injection, 80% signal intensity at 1 hour and 50% signal intensity at 2 1/2 hours after injection. According to our qualitative findings, pathology of the shoulder joints was more accurately diagnosed immediately after contrast medium injection than after 2 hours, due to high contrast and better spatial resolution after joint distension. 10 patients were found to have rotator cuff tears, 7 were partial-thickness and 3 fullthickness tears. 4 patients revealed tears to the glenoid labrum. One shoulder joint MRA was normal. The remaining 7 patients presented with degenerative changes of the glenohumeral and acromioclavicular joint or degenerative changes of the labroligamental complex. No complications occurred from the intra-articular injection of the contrast material. (Abstract truncated at 2000 characters).
Descriptors		SHOULDER JOINT MAGNETIC RESONANCE IMAGING ROTATOR CUFF SHOULDER FRACTURES RUPTURE CONTRAST MEDIA GADOLINIUM DTPA TIME FACTORS