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George Konstantinidis, Michael Mitchell, Gordon Boyd, Catherine Coady, Swagata Ghosh, Ivan Wong
OBJECTIVE: The purpose of this study was to retrospectively assess the frequency and characteristics of acetabular cartilage delamination (CD) in femoroacetabular impingement (FAI) patients and to assess the sensitivity, specificity, negative predictive value (NPV), and positive predictive value (PPV) of magnetic resonance arthrography (MRA) in detecting CD based on the radiologist report. DESIGN: This is a single-center retrospective review of consecutive patients operated for symptomatic FAI...
January 23, 2019: Cartilage
Michael J Lee, Michael L Richardson, Hyojeong Mulcahy, Felix S Chew, Jack Porrino
OBJECTIVE: Contrast material often extends from the radiocarpal joint into the proximal soft tissues adjacent to the ulnar aspect of the ulnar styloid during single-compartment radiocarpal joint MR arthrography of the wrist. The hypothesis of this study was that this is a common finding unrelated to symptoms or examination technique. MATERIALS AND METHODS: Wrist MR arthrograms were retrospectively reviewed in consensus by two radiologists. The presence or absence of ulnar-sided contrast extravasation was documented, whether this extravasation appeared contained or dispersed, as was the overall degree of proximal extension of the extravasated contrast material...
January 15, 2019: AJR. American Journal of Roentgenology
Jessica L Hughes, Peter Kruk, Tracey P Bastrom, Eric W Edmonds
BACKGROUND: Managing recurrent shoulder instability in an athlete of any age is challenging. The pediatric literature regarding recurrence of instability is difficult to interpret because of the variable treatment protocols and varying ages. The adult literature suggests that bone loss on the humerus, glenoid or both, as detected by CT, has high rates of recurrence following surgical intervention. OBJECTIVE: The purpose of this study was to evaluate risk factors for recurrence following arthroscopic capsulorrhaphy in adolescent athletes using preoperative MR arthrograms...
December 18, 2018: Pediatric Radiology
Wilbur Wang, Brady K Huang, Matthew Sharp, Lidi Wan, Niloofar Shojaeiadib, Jiang Du, Eric Y Chang
OBJECTIVE: The purpose of this study is to identify features seen at shoulder MR arthrography that distinguish between iatrogenic contrast material extravasation and inferior glenohumeral ligament (IGHL) complex tears. MATERIALS AND METHODS: MR arthrograms (n = 1740) were screened for extravasation through the IGHL complex. Cases were defined on the basis of surgical findings or definitive lack of extravasation in a fully distended joint immediately after contrast agent injection...
February 2019: AJR. American Journal of Roentgenology
Hayri Ogul, Kutsi Tuncer, Mehmet Kose, Berhan Pirimoglu, Mecit Kantarci
METHODS: This was a retrospective study of 604 consecutive shoulder MR images and MR arthrograms obtained from April 2010 to January 2018. Extension in the vertical-oblique plan of the posterior synovial fold on MR arthrography was identified according to the posterosuperior, posteroinferior, superoposterior, and inferoposterior portions. The morphologies of the posterior synovial folds on MR arthrography were divided three subtypes. Morphologic appearances of the posterior labrocapsular complex on conventional MR images were described with four subtypes...
November 28, 2018: British Journal of Radiology
Kagan Ozer, Andy F Zhu, Breana Siljander, Jeffrey N Lawton, Jennifer F Waljee
Background  Forearm rotation results in change in ulnar variance. Axial loading of the wrist is required to maintain daily activities. Change in ulnar variance during axial loading has not been investigated previously. Purpose  To measure the change in ulnar variance on axially loaded wrists. Patients and Methods  We examined 21 asymptomatic individuals and 24 patients with unilateral ulnar-sided wrist pain. All patients underwent standard neutral posteroanterior wrist radiographs without load and under axial loading on bilateral wrists...
July 2018: Journal of Wrist Surgery
Pascal Cyrill Haefeli, Florian Schmaranzer, Simon Damian Steppacher, Jennifer L Cullmann, Moritz Tannast, Lorenz Büchler
OBJECTIVES: To evaluate the appearance and distribution of intra-articular adhesions on direct MR arthrograms (MRA) in symptomatic patients after surgical hip dislocation (SHD) for the treatment of femoroacetabular impingement (FAI). METHODS: All 18 patients (19 hips) who underwent arthroscopic debridement for treatment of symptomatic adhesions after open surgery of FAI between 2003 and 2012 and that had a complete set of pre- and postoperative direct MRA were evaluated...
July 2018: European Journal of Radiology
Chad C Adams, Matthew J Loewen, Ian A Breckenridge, Jane E Besich-Carter, Lisabeth A Bush
OBJECTIVE: To assess the impact of shifting arthrogram injectate compounding from the fluoroscopy suite to the main hospital sterile pharmacy on cost, examination delays, and infection rates. MATERIALS AND METHODS: All arthrograms from the 12 months before (629 in total) and the 12 months after (699 in total) the change in arthrogram preparation procedure were compared to identify differences in examination delays and infection rate. The arthrogram formulation was sent to the Compounder's International Analytical Laboratory for stability testing...
May 30, 2018: Skeletal Radiology
Christin A Tiegs-Heiden, Nicholas G Rhodes, Mark S Collins, Quintin A Fender, Benjamin M Howe
OBJECTIVE: The purpose of this study is to describe the MR arthrogram appearance of the postoperative glenoid labrum and to describe the features consistent with recurrent tear. MATERIALS AND METHODS: We identified 30 patients who had undergone glenoid labral repair, had a subsequent MR arthrogram of his or her shoulder, and went on to repeat shoulder arthroscopy. Each MR arthrogram was reviewed blindly, and the glenoid labrum was described as normal, irregular, or torn...
May 13, 2018: Skeletal Radiology
Ezekiel Maloney, Andrew M Zbojniewicz, Jie Nguyen, Yu Luo, Mahesh M Thapa
Ligamentous injuries of the pediatric wrist, once thought to be relatively uncommon, are increasingly recognized in the context of acute high-energy mechanism trauma and chronic axial loading, including those encountered in both recreational and high-performance competitive sports. Recent advances in MR-based techniques for imaging the pediatric wrist allow for sensitive identification of these often radiographically occult injuries. Detailed knowledge of the intrinsic and supportive extrinsic ligamentous complexes, as well as normal developmental anatomy and congenital variation, are essential to accurately diagnose injuries to these structures...
June 2018: Pediatric Radiology
Thomas Magee
OBJECTIVE: Post-operative shoulder patients are often difficult to image due to scar tissue, metallic artifact, and residual irregularity of anatomic structures. The purpose of this study was to assess MR versus MR arthrography versus CT arthrography in the post-operative shoulder. Also, we assessed whether injecting CT contrast in addition to MR contrast during arthrography improved patient care. METHODS AND MATERIALS: One hundred consecutive post-operative conventional shoulder MR and MR arthrography exams performed on the same patients were reviewed retrospectively by two musculoskeletal radiologists...
September 2018: Skeletal Radiology
Michael Jernick, Edward Walker Gallego, Michael Nuzzo
Background: Ultrasound (US)-guided intra-articular hip injections have been proposed in the literature to be accurate, reliable, and safe alternatives to fluoroscopy-guided injections. Purpose: To evaluate the accuracy of US-guided magnetic resonance (MR) arthrogram injections of the hip performed in the office setting by a single orthopaedic surgeon and elucidate the potential effects that patient age, sex, and body mass index (BMI) have on contrast placement. Study Design: Case series; Level of evidence, 4...
December 2017: Orthopaedic Journal of Sports Medicine
Marissa Borgese, Robert D Boutin, Christopher O Bayne, Robert M Szabo, Abhijit J Chaudhari
OBJECTIVE: Radiologic presentation of carpal instability at the radial side of the carpus, e.g. scapholunate diastasis following scapholunate interosseous ligament injury, has been studied extensively. By comparison, presentation at the ulnar-sided carpus has not. The purpose of this study was to assess the effects of lunate morphology, sex, and lunotriquetral interosseous ligament (LTIL) status on the radiologic measurement of the capitate-triquetrum joint (C-T distance). Further, we sought to evaluate the diagnostic accuracy of C-T distance for assessing LTIL injuries...
December 2017: Skeletal Radiology
Yusuhn Kang, Joon Woo Lee, Joong Mo Ahn, Eugene Lee, Heung Sik Kang
OBJECTIVES: To evaluate the diagnostic value of MR arthrography (MRA) in diagnosing instability of the LHBT in patients with rotator cuff tendon tear. MATERIALS AND METHODS: The MR arthrograms of 101 patients were retrospectively reviewed and correlated with arthroscopic findings as the standard reference. Images were evaluated for (1) the integrity of the LHBT, (2) the position of the LHBT (subluxation/dislocation on axial images, inferior displacement on oblique sagittal image) and (3) the integrity of the biceps pulley (SGHL, supraspinatus and subscapularis tendon adjacent to the rotator interval)...
October 2017: Skeletal Radiology
Gabin Yun, Yusuhn Kang, Joong Mo Ahn, Eugene Lee, Joon Woo Lee, Joo Han Oh, Heung Sik Kang
OBJECTIVE: The purpose of this study is to analyze MRI findings associated with posterior decentering of the humeral head on shoulder MR arthrogram. MATERIALS AND METHODS: A total of 255 MR arthrograms were obtained during a 10-month period. MR arthrograms in patients with posterior decentering of the humeral head (n = 33) were reviewed and compared with those of randomly selected control group without posterior decentering (n = 66). MR arthrograms were retrospectively evaluated by two observers for posterior factors (posterior synovial proliferation, posterior capsular thickening, and posterior labral abnormality), rotator cuff factors related to fatty degeneration, glenoid version, and anterior factors (subcoracoid bursa effusion and rotator interval tear)...
June 2017: AJR. American Journal of Roentgenology
Hayri Ogul, Yunus Guzel, Berhan Pirimoglu, Kutsi Tuncer, Gokhan Polat, Fatih Ergun, Recep Sade, Ummugulsum Bayraktutan, Ihsan Yuce, Mecit Kantarci
PURPOSE: To evaluate the tibiotalar joint capacity and the localisation, frequency and amount of extravasation in patients with extraarticular contrast material leakage into adjacent synovial compartments on ankle magnetic resonance (MR) arthrography. MATERIALS AND METHODS: Sites of extravasation were determined in the ankle MR arthrograms of 69 patients. Thirty-four patients without extraarticular contrast material leakage into locations unrelated to the injection path were included as a control group...
October 2016: European Journal of Radiology
Stephen A Parada, Josef K Eichinger, Guillaume D Dumont, Lauren E Burton, Maggie S Coats-Thomas, Stephen D Daniels, Nathan J Sinz, Matthew T Provencher, Laurence D Higgins, Jon J P Warner
PURPOSE: To evaluate glenoid version and humeral subluxation on preoperative multiplanar imaging of patients who underwent surgery for posterior glenohumeral instability compared with a matched group of patients who had shoulder surgery for other pathology. METHODS: All patients over a 2-year period who underwent surgery for posterior instability had preoperative magnetic resonance (MR) imaging or MR arthrogram reviewed. Patients undergoing shoulder surgery for reasons other than instability were identified as a control group and matched by sex, laterality, and age...
February 2017: Arthroscopy
Theodore B Gupton, Jorge Delgado, Diego Jaramillo, Anne M Cahill, Nancy A Chauvin
BACKGROUND: There is no consensus in the literature concerning the optimal approach for performing a fluoroscopically guided shoulder arthrogram injection in a pediatric population. OBJECTIVE: To compare adequacy of capsular injection and radiation doses between fluoroscopically guided anterior and posterior glenohumeral joint contrast injections in adolescents. MATERIALS AND METHODS: We evaluated imaging in 67 adolescents (39 boys, 28 girls; mean age 16...
December 2016: Pediatric Radiology
Mark Zhu, Simon W Young, Clinton Pinto, Peter C Poon
BACKGROUND: Recurrent anterior shoulder dislocations are common in young patients with Bankart lesions. Arthroscopic repair is an established treatment; however, recurrent instability occurs in up to 35% of patients. It is unclear whether recurrence is the result of a failure of the surgical repair to heal or a repeat injury. The aim of the present pilot study was to assess radiographic healing of Bankart lesions 6 months post surgical repair and identify any correlations between radiographic findings and subsequent recurrent dislocations...
April 2015: Shoulder & Elbow
Lauren M Ladd, James S Keene, Alejandro Munoz Del Rio, Humberto G Rosas
OBJECTIVE: The purpose of this study is to determine whether the preoperative response to intraarticular hip anesthetic injection correlates with the outcome of hip arthroscopy. A secondary aim is to determine whether the outcome of arthroscopy correlates with intraarticular pathologic findings or patient demographic characteristics. MATERIALS AND METHODS: Ninety-three patients who underwent MR arthrography (MRA), preoperative injections of anesthetic into the hip joint (with pain scores documented), and subsequent hip arthroscopy (with a modified Harris Hip Score [mHHS] determined at 1 year after arthroscopy) were included in the study...
November 2016: AJR. American Journal of Roentgenology
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