ABSTRACT
Objective To investigate the optimal display orientation of rotator cuff space(RI)structures on magnetic resonance(MR)scanning and arthrography.Methods A total of 80 patients who underwent MR scanning and arthrography in our hospital from January 2021 to March 2023 were selected and all of them were confirmed to have normal RI by shoulder arthroscopy.The RI and the superior glenohumeral ligament(SGHL),the long head of biceps tendon(LHBT),and the coracohumeral ligament(CHL)in the transverse axial,oblique sagittal,and oblique coronal positions were counted in the transverse axial,oblique sagittal,and oblique coronal positions on MR scanning and arthrography.Results The display rate of RI structure by oblique sagittal scan was 17.50%higher than that by horizontal scan,0.00%and oblique coronal scan,5.00%(4/80)(χ2 = 18.739,P<0.001).The display of SGHL,LHBT and CHL in RI by MR Oblique sagittal scan was better than that in transverse axis and oblique coronal scan(χ2 = 26.036,P<0.001).MR oblique sagittal arthrography showed a higher rate of RI structures 57.50%than transverse axial 5.00%and oblique coronal 17.50%(χ2 = 61.534,P<0.001);MR oblique sagittal arthrography showed better display of SGHL,LHBT,and CHL structures in RI than transverse axial and oblique coronal(χ2 = 64.569,P<0.001);MR oblique sagittal arthrography had a significantly higher rate of complete visualization of RI structures in 57.50%than MR oblique sagittal plain scanning in 17.50%(χ2 = 27.307,P<0.05).Conclusion Oblique sagittal position is the optimal display orientation for MR scanning and arthrography to show RI structures.
ABSTRACT
Objective To investigate the value of MRI in the diagnosis and differential diagnosis of bladder leiomyoma.Methods Clinical data,pathological files and MRI findings of 8 patients with bladder leiomyoma that verified by pathologic were analyzed retrospectively.Results 4 cases of bladder leiomyoma were located in front bladder wall, 3 cases were in post bladder wall and 1 case in right bladder wall;meanwhile, 6 cases were endovesical(75.0%),1 case was intramural(12.5%) and another 1 case was extravesical(12.5%).All lesions displayed equal signals on T1WI, equal or slightly high signals on T2WI with mild and moderate enhancements;bladder wall adjacent to tumors and structures around were not invaded by tumors.6 cases of all displayed inhomogeneous signals on T2WI and with some patchy or stripe high signals in it, the signals turned to equal on a fat-saturated T1WI which was similar with muscle of pelvic wall.Conclusion MRI features of bladder leiomyoma showed certain characteristics.