1
|
Gokce A, Guclu D, Unlu EN, Kazoglu I, Arican M, Ogul H. Comparison of conventional MR arthrography and 3D volumetric MR arthrography in detection of cartilage defects accompanying glenoid labrum pathologies. Skeletal Radiol 2024; 53:1081-1090. [PMID: 38051423 DOI: 10.1007/s00256-023-04536-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/07/2023]
Abstract
OBJECTIVES In this study, we aimed to compare conventional and T1-weighted volumetric magnetic resonance arthrography (MRA) in the diagnosis and grading of glenoid cartilage defects that accompany labral pathologies. MATERIALS AND METHODS A total of 79 patients who were prediagnosed with labrum pathologies based on shoulder magnetic resonance imaging (MRI) had MRA and CTA between December 2021 and May 2022. CTA was regarded as reference standard. CTA images were examined by a radiologist experienced in musculoskeletal radiology, and MRA images were examined by two radiologists independently to determine presence, grade, and localization of any glenoid cartilage defect, if present. Sensitivity, specificity, and accuracy were calculated separately for conventional and T1-weighted volumetric MRA. In addition, at the last stage, two observers examined all MRAs together, and the presence of a cartilage defect was decided by consensus, and the overall sensitivity, specificity, and accuracy were calculated. RESULTS Cartilage defect was detected on CTAs of 48 (60.75%) cases of among 79 patients with labrum pathology. The sensitivity, specificity, and accuracy of conventional MRA for two examiners were 17-19%, 100-100%, and 49-51%, respectively, while those values were 67-65%, 92-97%, and 84-77%, respectively, for T1-weighted volumetric MRA. Inter-examiner agreement was excellent for diagnosis of cartilage defects on all MRAs. The overall sensitivity, specificity, and accuracy for detection of glenoid cartilage lesions by MRA were 69%, 97%, and 80%, respectively. CONCLUSION T1-weighted volumetric MRA seems to demonstrate cartilage defects accompanied with labrum pathologies accurately with high sensitivity, specificity, and excellent inter-examiner agreement.
Collapse
Affiliation(s)
- Ayse Gokce
- Department of Radiology, Aksaray Research and Training Hospital, Aksaray, Turkey.
| | - Derya Guclu
- Department of Radiology, Faculty of Medicine, Duzce University, Duzce, Turkey
| | - Elif Nisa Unlu
- Department of Radiology, Faculty of Medicine, Duzce University, Duzce, Turkey
| | - Ibrahim Kazoglu
- Department of Orthopedics and Traumatology, Faculty of Medicine, Duzce University, Duzce, Turkey
| | - Mehmet Arican
- Department of Orthopedics and Traumatology, Faculty of Medicine, Duzce University, Duzce, Turkey
| | - Hayri Ogul
- Department of Radiology, Faculty of Medicine, Duzce University, Duzce, Turkey
| |
Collapse
|
2
|
Mastrantonakis K, Karvountzis A, Yiannakopoulos CK, Kalinterakis G. Mechanisms of shoulder trauma: Current concepts. World J Orthop 2024; 15:11-21. [PMID: 38293258 PMCID: PMC10824064 DOI: 10.5312/wjo.v15.i1.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 12/08/2023] [Accepted: 12/29/2023] [Indexed: 01/16/2024] Open
Abstract
Acute traumatic injuries to the glenohumeral articulation are common. The types of injuries depend on age, muscle strength, bone density, and biomechanics of the traumatic event. Understanding the different mechanisms of trauma and how they affect the functional anatomical structures of the shoulder joint is crucial for the treatment of these lesions. Therefore, when clinicians have knowledge of these mechanisms they can accurately diagnose and treat shoulder pathology and predict distinct injury patterns. Here, we have described the fundamentals of the mechanisms of injury of the glenohumeral dislocation, dislocation with fracture of the humeral head, and the proximal humerus fracture. We have focused on common injury mechanisms and the correlation with radiological diagnostics. Radiological and laboratory findings of distinct types of injury were also discussed.
Collapse
Affiliation(s)
| | | | - Christos K Yiannakopoulos
- Department of Orthopaedic Surgery, National and Kapodistrian University of Athens, Athens 11527, Greece
| | | |
Collapse
|
3
|
Shoulder Magnetic Resonance Arthrography with the Internal and External Rotation Positions of the Humeral Head in the Evaluation of SLAP Lesions. Diagnostics (Basel) 2022; 12:diagnostics12092230. [PMID: 36140630 PMCID: PMC9497654 DOI: 10.3390/diagnostics12092230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/06/2022] [Accepted: 09/13/2022] [Indexed: 11/16/2022] Open
Abstract
We aimed to evaluate the diagnostic performance of shoulder MR arthrography (MRA) acquired in the neutral (N), internal rotation (IR), and external rotation (ER) positions of the shoulder to detect SLAP lesions. Three observers evaluated 130 MRAs to detect SLAP lesions and to calculate labral diastasis in this triple-blinded study. Sensitivity was much higher in the ER (92.5–97.5%) than in the N (60–72.5%) and IR (42.5–52.5%) positions, and the specificity of all the reviewers was 100% in all the positions. The diagnostic accuracy was higher in the ER too (97.7–99.2%). The diastasis length was significantly higher in the ER (median = 2.5–2.8 mm) than in the N (1 mm) and IR (0 mm) positions and was also significantly higher in those patients requiring surgery (p = 0.001). The highest inter-rater agreement values were observed in the ER both in SLAP detection (k = 0.982) and the diastasis length evaluation (ICC = 0.962). The diastasis length threshold in the ER that best separated the patients who did and did not require surgery was 3.1 mm (AUC = 0.833). In 14.6% of the cases, ER enabled the detection of SLAP lesions not identified in the N position. MRA with the ER improves the diagnosis of SLAP lesions and, together with the IR position, provides additional dynamic information about the diastasis of the lesions. It is recommended to perform additional ER and IR scans in the shoulder MRA protocol.
Collapse
|
4
|
Cheraya G, Sharma S, Chhabra A. Dual energy CT in musculoskeletal applications beyond crystal imaging: bone marrow maps and metal artifact reduction. Skeletal Radiol 2022; 51:1521-1534. [PMID: 35112139 DOI: 10.1007/s00256-021-03979-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 02/02/2023]
Abstract
Dual energy CT (DECT) is becoming increasingly popular and valuable in the domain of musculoskeletal imaging. Gout maps and crystal detection have been predominant indications for about a decade. Other important indications of bone marrow maps and metal artifact reduction are also frequent with added advantages of detection and characterization of bone marrow lesions similar to MR imaging and diagnosis of hardware related complications, respectively. This article discusses technical considerations and physics of DECT imaging and its role in musculoskeletal indications apart from crystal imaging with respective case examples and review of the related literature. DECT pitfalls in these domains are also highlighted and the reader can gain knowledge of above concepts for prudent use of DECT in their musculoskeletal and general practices.
Collapse
Affiliation(s)
| | - Salil Sharma
- Mary Imogene Bassett Hospital, Cooperstown, NY, USA
| | | |
Collapse
|
5
|
A Comparative Study on the Diagnostic Value of CTA and MRA in Anterior Dislocation of Shoulder. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:9461236. [PMID: 35450205 PMCID: PMC9017485 DOI: 10.1155/2022/9461236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/27/2022] [Accepted: 03/14/2022] [Indexed: 11/29/2022]
Abstract
Objective To investigate the diagnostic value of CTA and MRA in anterior dislocation of shoulder. Methods The detection of inferior glenohumeral ligament injuries, anterior inferior labrum injuries, and bone and cartilage injuries by the two examination procedures was observed and compared with the results of arthroscopy or surgery on patients referred to our hospital owing to anterior dislocation of shoulder. Results. A total of 36 patients with shoulder injuries were gathered for this study. 32 cases with anterior inferior labrum tearings (27 cases detected by CTA and 30 cases by MRA), 24 cases with inferior glenohumeral ligament tearings (14 cases detected by CTA and 22 cases by MRA), 24 cases with inferior glenohumeral ligament tearings (14 cases detected by CTA and 22 cases by MRA), and 24 cases with inferior glenohumeral ligament tearings (14 cases detected by CTA and 22 cases by MRA) were detected. There were 30 bone and cartilage injuries, including 18 fractures (CTA identified 18), 10 bone contusions (CTA detected 0), and 5 cartilage damage (CTA detected 0) (CTA detected 0, MRA detected 5). Conclusion The detection rate of MRA is better than that of CTA for inferior glenohumeral ligament injuries. For anterior inferior labrum injury, the detection rate of CTA and MRA was similar. CTA is more conducive to the detection of fracture blocks, while MRA is more advantageous for the observation of bone contusion and cartilage damage.
Collapse
|
6
|
Bao MH, DeAngelis JP, Wu JS. Imaging of traumatic shoulder injuries – Understanding the surgeon’s perspective. Eur J Radiol Open 2022; 9:100411. [PMID: 35265737 PMCID: PMC8899241 DOI: 10.1016/j.ejro.2022.100411] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 02/13/2022] [Accepted: 02/23/2022] [Indexed: 12/18/2022] Open
Abstract
Imaging plays a key role in the assessment and management of traumatic shoulder injuries, and it is important to understand how the imaging details help guide orthopedic surgeons in determining the role for surgical treatment. Imaging is also crucial in preoperative planning, the longitudinal assessment after surgery and the identification of complications after treatment. This review discusses the mechanisms of injury, key imaging findings, therapeutic options and associated complications for the most common shoulder injuries, tailored to the orthopedic surgeon’s perspective.
Collapse
|
7
|
Muylaert C, Boulet C, Buls N, Wuertzer S, Pouliart N, Machiels F, De Maeseneer M. Does Immobilization Post Injection Reduce Contrast Extravasation in MR Arthrography of the Shoulder? Can Assoc Radiol J 2021; 73:164-169. [PMID: 33874778 DOI: 10.1177/08465371211005147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Contrast leakage after arthrography is common. We sought to investigate if immobilization could prevent it. PURPOSE The purpose of this study was to determine the effects on contrast extravasation and image quality produced by strict immobilization of the shoulder between arthrography puncture and subsequent MR imaging. MATERIAL AND METHODS Fifty patients underwent shoulder MR arthrography using a standard shoulder puncture in the anteroinferior quadrant. Ten milliliters of contrast mixture of saline, iodinated contrast, and gadolinium contrast was injected by a senior musculoskeletal (MSK) radiologist using a 21G needle. Half of the patients were immediately immobilized using a shoulder sling, and the other half were allowed to move their shoulder and arm freely during the time before MR imaging. MR arthrography was performed with a 3 T system using standard T1 and PD weighted sequences. The MR images were reviewed independently by 2 MSK radiologists and graded for extravasation using a five-point scale (1: none, 2: less than 2 cm, 3: 2-5 cm, 4: 5-10 cm, 5: more than 10 cm) and for image quality using a 5 point scale (1: poor, 5: good). The Pearson correlation was calculated to assess the correlation between leakage and image quality. RESULTS There was no significant difference in amount of leakage between both groups, and global image quality was found equal in both groups. A negative correlation was found between leakage and quality assessment. CONCLUSION This study shows that it cannot be avoided by strict shoulder immobilization and that it negatively affects image quality and interpretation.
Collapse
Affiliation(s)
- Caroline Muylaert
- Department of Radiology, 60201Universitair Ziekenhuis Brussel, Jette, Belgium
| | - Cedric Boulet
- Department of Radiology, 60201Universitair Ziekenhuis Brussel, Jette, Belgium
| | - Nico Buls
- Department of Radiology, 60201Universitair Ziekenhuis Brussel, Jette, Belgium
| | - Scott Wuertzer
- Department of Radiology, 8676Wake Forest University, Winston-Salem, NC, USA
| | - Nicole Pouliart
- Department of Orthopedic Surgery, 60201Universitair Ziekenhuis Brussel, Jette, Belgium
| | - Freddy Machiels
- Department of Radiology, 60201Universitair Ziekenhuis Brussel, Jette, Belgium
| | - Michel De Maeseneer
- Department of Radiology, 60201Universitair Ziekenhuis Brussel, Jette, Belgium
| |
Collapse
|
8
|
Sandhu R, Aslan M, Obuchowski N, Primak A, Karim W, Subhas N. Dual-energy CT arthrography: a feasibility study. Skeletal Radiol 2021; 50:693-703. [PMID: 32948903 DOI: 10.1007/s00256-020-03603-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 09/08/2020] [Accepted: 09/10/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To evaluate the feasibility of producing 2-dimensional (2D) virtual noncontrast images and 3-dimensional (3D) bone models from dual-energy computed tomography (DECT) arthrograms and to determine whether this is best accomplished using 190 keV virtual monoenergetic images (VMI) or virtual unenhanced (VUE) images. MATERIALS AND METHODS VMI and VUE images were retrospectively reconstructed from patients with internal derangement of the shoulder or knee joint who underwent DECT arthrography between September 2017 and August 2019. A region of interest was placed in the area of brightest contrast, and the mean attenuation (in Hounsfield units [HUs]) was recorded. Two blinded musculoskeletal radiologists qualitatively graded the 2D images and 3D models using scores ranging from 0 to 3 (0 considered optimal). RESULTS Twenty-six patients (mean age ± SD, 57.5 ± 16.8 years; 6 women) were included in the study. The contrast attenuation on VUE images (overall mean ± SD, 10.5 ± 16.4 HU; knee, 19.3 ± 10.7 HU; shoulder, 5.0 ± 17.2 HU) was significantly lower (p < 0.001 for all comparisons) than on VMI (overall mean ± SD, 107.7 ± 43.8 HU; knee, 104.6 ± 31.1 HU; shoulder, 109.6 ± 51.0 HU). The proportion of cases with optimal scores (0 or 1) was significantly higher with VUE than with VMI for both 2D and 3D images (p < 0.001). CONCLUSIONS DECT arthrography can be used to produce 2D virtual noncontrast images and to generate 3D bone models. The VUE technique is superior to VMI in producing virtual noncontrast images.
Collapse
Affiliation(s)
- Rashpal Sandhu
- Imaging Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Mercan Aslan
- Imaging Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Nancy Obuchowski
- Department of Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Andrew Primak
- Siemens Medical Solutions USA, Inc., Malvern, PA, 19355, USA
| | - Wadih Karim
- Imaging Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Naveen Subhas
- Imaging Institute, Cleveland Clinic, Cleveland, OH, 44195, USA.
| |
Collapse
|
9
|
Hosseinzadeh S, DeAngelis JP, Komarraju A, Wu AC, Wu JS. Imaging of Acute Shoulder Trauma. Semin Roentgenol 2020; 56:5-21. [PMID: 33422184 DOI: 10.1053/j.ro.2020.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Acute injuries to the shoulder girdle are common and frequently encountered by the practicing radiologist. The type of injury is highly dependent on the age of the patient and mechanism of trauma with injuries occurring at the site of greatest mechanical weakness. In this review, we discuss the main clinical features and key imaging findings for the most common shoulder injuries. For each injury, we also provide a section on the important features that the orthopedic surgeon needs to know in order to guide surgical versus nonsurgical management.
Collapse
Affiliation(s)
- Shayan Hosseinzadeh
- Department of Orthopedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Joseph P DeAngelis
- Department of Orthopedic Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
| | - Aparna Komarraju
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
| | - Allison C Wu
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA
| | - Jim S Wu
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA.
| |
Collapse
|
10
|
Wechselberger J, Neumann J, Wörtler K. Bildgebende Diagnostik bei glenohumeralen Knorpelschäden und Schulter-Früharthrose. ARTHROSKOPIE 2020. [DOI: 10.1007/s00142-020-00392-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
11
|
Foti G, Mantovani W, Catania M, Avanzi P, Caia S, Zorzi C, Carbognin G. Evaluation of glenoid labral tears: comparison between dual-energy CT arthrography and MR arthrography of the shoulder. Radiol Med 2019; 125:39-47. [PMID: 31541346 DOI: 10.1007/s11547-019-01083-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 09/12/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To compare the diagnostic accuracy of dual-energy computed tomography arthrography (DE-CTA) and magnetic resonance arthrography (MRA) of the shoulder in depicting glenoid labral tears. METHODS This prospective institutional review board-approved study included 47 consecutive patients (28 males, 19 females; mean age of 34.2 years) studied between January 2017 and October 2018. All patients underwent DE-CTA and MRA the same day. Two radiologists (25 and 11 years of experience, respectively), blinded to clinical data, evaluated the presence labral tears on virtual-blended 120 kV standard CTA and on DE-CTA images. A third radiologist (18 years of experience) evaluated the MRA images. Diagnostic accuracy values were calculated by using surgery as standard of reference. Inter-observer and intra-observer agreements were calculated with k statistics. A value of p < 0.05 was considered statistically significant. RESULTS Surgery revealed the presence of labral tears in 38/47 patients (80.9%). Sensitivity and specificity values in diagnosing labral tears were 84.2% and 77.8% for MRA (Reader 3), 84.2% and 77.8% for CTA (Reader 1), 84.2% and 88.9% for CTA (Reader 2), 89.5% and 88.9% for DE-CTA (Reader 1), and 92.1% and 88.9% for DE-CTA (Reader 2). A nonsignificant increase in AUC values with respect to MRA was obtained by reading the CTA (p = 0.470) and DE-CTA dataset (p = 0.217), respectively. Inter-observer agreements were near perfect for CTA (k = 0.84) and substantial for DE-CTA reading (k = 0.76). Intra-observer agreements were near perfect both for CTA (k = 0.88) and for DE-CTA reading (k = 0.82). CONCLUSION DE-CTA and MRA were not different in terms of diagnostic performance.
Collapse
Affiliation(s)
- Giovanni Foti
- Department of Radiology, IRCCS Sacro Cuore Hospital, Negrar, Italy.
| | - William Mantovani
- Department of Preventive Medicine Public Health Trust, Trento, Italy
| | - Matteo Catania
- Department of Radiology, IRCCS Sacro Cuore Hospital, Negrar, Italy
| | - Paolo Avanzi
- Department of Orthopaedic Surgery, IRCCS Sacro Cuore Don Calabria Hospital, Negrar, Italy
| | - Simone Caia
- Department of Radiology, IRCCS Sacro Cuore Don Calabria Hospital, Negrar, Italy
| | - Claudio Zorzi
- Department of Orthopaedic Surgery, Sacro Cuore Hospital, Negrar, Italy
| | | |
Collapse
|
12
|
Klaan B, Wuennemann F, Kintzelé L, Gersing AS, Weber MA. [MR and CT arthrography in cartilage imaging : Indications and implementation]. Radiologe 2019; 59:710-721. [PMID: 31286150 DOI: 10.1007/s00117-019-0564-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND The imaging of chondral pathologies is an essential part in the work-up of acute and chronic joint diseases. Besides conventional MR imaging, CT and MR arthrography are well-established methods in evaluating articular cartilage. The application of these techniques requires knowledge of indications and safe injection procedures by the performing radiologist. PURPOSE Our goal is to describe the techniques of cross-sectional arthrographies of different joints, give an overview of general and joint-specific considerations for practical application as well as provide typical indications for cartilage imaging. MATERIALS AND METHODS A selective PubMed literature search concerning "arthrography", "CT arthrography", "MR arthrography", "arthrography cartilage", "arthrography wrist", "arthrography elbow", "arthrography shoulder", "arthrography hip", "arthrography knee", "arthrography ankle", "arthrography complications", "arthrography imaging guidance" "osteochondral lesion", "cartilage imaging" and "cartilage lesion" was performed. RESULTS AND CONCLUSION CT and MR arthrography are valuable and safe tools in cartilage imaging. They are useful to verify and specify chondral pathologies, usually after conventional MR imaging, and have an important role in evaluating the stability and therefore in therapeutic decision making of osteochondral lesions. CT arthrography is not only a substitute technique in case of MR contraindications, it can be advantageous in small joints (wrist, elbow, ankle) compared to MR arthrography due to its higher image resolution. Fluoroscopic guided joint puncture is still the most commonly used image guidance method, but the role of ultrasound is steadily increasing. Joint traction in MR arthrography is a promising technique to improve cartilage visualization, though it is not yet used in clinical routine imaging.
Collapse
Affiliation(s)
- B Klaan
- Institut für Diagnostische und Interventionelle Radiologie, Kinder- und Neuroradiologie, Universitätsmedizin Rostock, Ernst-Heydemann-Straße 6, 18057, Rostock, Deutschland.
| | - F Wuennemann
- Diagnostische und Interventionelle Radiologie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - L Kintzelé
- Diagnostische und Interventionelle Radiologie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - A S Gersing
- Institut für Diagnostische und Interventionelle Radiologie, Klinikum rechts der Isar, Technische Universität München, München, Deutschland
| | - M-A Weber
- Institut für Diagnostische und Interventionelle Radiologie, Kinder- und Neuroradiologie, Universitätsmedizin Rostock, Ernst-Heydemann-Straße 6, 18057, Rostock, Deutschland
| |
Collapse
|
13
|
Ogul H, Ayyildiz V, Pirimoglu B, Polat G, Tuncer K, Kose M, Kantarci M. Magnetic Resonance Arthrographic Demonstration of Association of Superior Labrum Anterior and Posterior Lesions With Extended Anterior Labral Tears. J Comput Assist Tomogr 2019; 43:51-60. [PMID: 30015797 DOI: 10.1097/rct.0000000000000775] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE The objective of this study was to evaluate retrospectively the full extent of anterior labral tear and associated other labral tears on magnetic resonance arthrographic images in patients with anterior shoulder instability. MATERIALS AND METHODS One hundred ten magnetic resonance arthrography images with anterior labral tear were retrieved from the database of the Radiology Department. Two skeletal radiologists, one with 15 years of experience and the other with 5 years of experience analyzed the images in random order. Approval for the study was granted by the Ethics Committee. Statistical analyses were performed using SPSS software. RESULTS The most common localization of the labral lesions was at the anterior-inferior part of the glenoid labrum (22.7%). The anterior labral tears were commonly associate with superior labrum anterior and posterior (SLAP) lesions (45%). The most common type of SLAP lesion was type V (23.6%). Superior Labrum Anterior and Posterior type V lesion was more often detected in patients with Bankart lesion (27.7%, P = 0.043). CONCLUSIONS Isolated anterior labral tears are less than expected. In majority of the cases, a distinct tear at a different site of the labrum accompanies the anterior labral tear. Massive anterior labral tears are mostly seen together with SLAP lesions.
Collapse
Affiliation(s)
| | | | | | | | - Kutsi Tuncer
- Department of Orthopedic, Medical Faculty, Ataturk University, Erzurum, Turkey
| | - Mehmet Kose
- Department of Orthopedic, Medical Faculty, Ataturk University, Erzurum, Turkey
| | | |
Collapse
|
14
|
Abstract
Background: SLAP lesions of the shoulder are challenging to diagnose by clinical means alone. Interpretation of MR images requires knowledge of the normal appearance of the labrum, its anatomical variants, and the characteristic patterns of SLAP lesions. In general, high signal extending anterior and posterior to the biceps anchor is the hallmark of SLAP lesions. Common diagnostic criteria for a SLAP lesion by MR or MR arthrography include the following: presence of a laterally curved, high signal intensity in the labrum on a coronal image, multiple or branching lines of high signal intensity in the superior labrum on a coronal image, full-thickness detachment with irregularly marginated high signal intensity and/or separation >2 mm on conventional MRI or 3 mm on MR arthrography between the labrum and glenoid on a coronal image, and a paralabral cyst extending from the superior labrum. Methods: MR diagnosis of SLAP tears may be improved with provocative maneuvers, such as longitudinal traction of the arm or positioning of the shoulder in abduction and external rotation during imaging. The use of intra-articular contrast distends the joint similar to what occurs during arthroscopy and forced diffusion under the labrum may improve the ability to detect SLAP lesions that might not be seen with standard MR. Improved diagnostic accuracy for SLAP tears is seen with 3-T compared with 1.5-T MR imaging, with or without intra-articular contrast material. Conclusion: Regardless of MR findings, however, physicians should be cautious when recommending surgery in the patient with a vague clinical picture. The patient’s history, physical exam, and imaging evaluation all should be considered together in making the decision to proceed with surgery.
Collapse
Affiliation(s)
- Robert D Boutin
- Department of Radiology, UC Davis School of Medicine, 4860 Y St., Suite 3100, Sacramento, CA 95817, USA
| | - Richard A Marder
- Department of Orthopaedic Surgery, UC Davis School of Medicine, 4860 Y St., Suite 3800, Sacramento, CA 95817, USA
| |
Collapse
|
15
|
Bhure U, Roos JE, Pérez Lago MDS, Steurer I, Grünig H, Hug U, Strobel K. SPECT/CT arthrography. Br J Radiol 2017; 91:20170635. [PMID: 29099611 DOI: 10.1259/bjr.20170635] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Single photon emission CT (SPECT)/CT arthrography, the combination of CT arthrography and late phase bone SPECT/CT, has been developed in 2011 and so far used in knee, ankle and wrist joints. SPECT/CT offers functional information about increased bone turnover in combination with morphological details. Compared with SPECT/CT alone, additional intra-articular contrast enables the assessment of cartilage, menisci, ligaments and loose bodies. SPECT/CT arthrography is a promising alternative technique for the evaluation of internal derangement of joints in patients with MR contraindications and/or metallic implants. In this article, we review and report our 5-year experience with this technique illustrated with patient examples and give a perspective for future applications.
Collapse
Affiliation(s)
- Ujwal Bhure
- 1 Nuclear Medicine and Radiology, Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Justus E Roos
- 1 Nuclear Medicine and Radiology, Cantonal Hospital Lucerne, Lucerne, Switzerland
| | | | - Isabelle Steurer
- 1 Nuclear Medicine and Radiology, Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Hannes Grünig
- 1 Nuclear Medicine and Radiology, Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Urs Hug
- 2 Department of Hand and Plastic Surgery, Cantonal Hospital Lucerne, Lucerne, Switzerland
| | - Klaus Strobel
- 1 Nuclear Medicine and Radiology, Cantonal Hospital Lucerne, Lucerne, Switzerland
| |
Collapse
|
16
|
Is the subscapularis normal after the open Latarjet procedure? An isokinetic and magnetic resonance imaging evaluation. J Shoulder Elbow Surg 2017; 26:1775-1781. [PMID: 28601489 DOI: 10.1016/j.jse.2017.03.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Revised: 03/20/2017] [Accepted: 03/27/2017] [Indexed: 02/01/2023]
Abstract
BACKGROUND The Latarjet procedure is considered to be a violation of the subscapularis muscle. This study evaluated the postoperative status of the subscapularis through isokinetic and magnetic resonance imaging analysis after splitting. We hypothesized that compared with a healthy contralateral shoulder, there would be satisfactory recovery of subscapularis strength at the cost of some fatigability and some mild fatty infiltration. MATERIALS AND METHODS This was a case-control retrospective study of patients who underwent a Latarjet procedure between January 2013 and January 2015. A total of 20 patients were reviewed at 1 year postoperatively. With the patient seated, strength testing of both shoulders was done (concentric, eccentric, and fatigability) with a dynamometer. Trophicity and fatty infiltration were analyzed by magnetic resonance imaging. RESULTS Strength of the internal rotators (IRs) and external rotators (ERs) of the injured shoulder was significantly lower compared with the healthy shoulder in concentric testing at 180°/s and 60°/s (13% for IR and 20% for E, P < .05) and in eccentric testing at 60°/s (19% for IR and 16% for ER, P < .05). A peak torque ratio (ER/IR) of the operated-on shoulder was maintained. The difference in muscular endurance was significant (P < .001). There was no muscle atrophy and minimal or no fatty infiltration of the subscapularis in any patient. CONCLUSION At 1 year after the open Latarjet procedure, isokinetic testing showed a combined strength deficit in both internal and external rotation with a conserved muscle balance. Although no significant subscapularis fatty infiltration or atrophy was noted, there was a significant deficit in endurance compared with the healthy shoulder.
Collapse
|
17
|
Abstract
Glenohumeral joint instability is usually an intimidating topic for most radiologists due to both the complexity of related anatomical and biomechanical considerations and the increasing number of classifications and acronyms reported in the literature in association with this condition. In this short review, we aim to demystify glenohumeral instability by first focusing on the relevant anatomy and pathophysiology. Second, we will review what the important imaging findings are and how to describe them for the clinician in the most relevant yet simple way. The role of the radiologist in assessing glenohumeral instability lesions is to properly describe the stabilizing structures involved (bone, soft-tissue stabilizers, and their periosteal insertion) to localize them and to attempt to characterize them as acute or chronic. Impaction fractures on the glenoid and humeral sides are important to specify, locate, and quantify. In particular, the description of soft-tissue stabilizers should include the status of the periosteal insertion of the capsulo-labro-ligamentous complex. Finally, any associated cartilaginous or rotator cuff tendon lesion should be reported to the clinician.
Collapse
|