scholarly journals Comparison of two methods for measuring the pubococcygeal line from sagittal-plane magnetic resonance imaging

2011 ◽  
Vol 30 (8) ◽  
pp. 1613-1619 ◽  
Author(s):  
Stéphanie Madill ◽  
An Tang ◽  
Stéphanie Pontbriand-Drolet ◽  
Chantal Dumoulin
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Sagittal Plane ◽  
Resonance Imaging ◽  
Pubococcygeal Line

The Kaplan Fibers of the Iliotibial Band Can Be Identified on Routine Knee Magnetic Resonance Imaging

2019 ◽  
Vol 47 (12) ◽  
pp. 2895-2903 ◽  
Author(s):  
Lachlan Batty ◽  
Jerome Murgier ◽  
Richard O’Sullivan ◽  
Kate E. Webster ◽  
Julian A. Feller ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Sagittal Plane ◽  
Interobserver Reliability ◽  
Joint Line ◽  
Coronal Plane ◽  
Iliotibial Band ◽  
Resonance Imaging ◽  
Lateral Gastrocnemius ◽  
The Mean

Background: The Kaplan fibers (KFs) of the iliotibial band have been suggested to play a role in anterolateral rotational instability of the knee, particularly in the setting of an anterior cruciate ligament (ACL) rupture. Description of the normal magnetic resonance imaging (MRI) anatomy of the KFs may facilitate subsequent investigation into the MRI signs of injury. Purpose: To assess if the KF complex can be identified on 3-T MRI using standard knee protocols. Study Design: Cohort study (diagnosis); Level of evidence, 3. Methods: 3-T MRI scans of 50 ACL-intact knees were reviewed independently by a musculoskeletal radiologist and 2 orthopaedic surgeons. Identification of the KFs was based on radiological diagnostic criteria developed a priori. Identification of the KFs in the sagittal, coronal, and axial planes was recorded. Interobserver reliability was assessed using the Kappa statistic. Detailed anatomy including distance to the joint line and relationship to adjacent structures was recorded. Results: The mean patient age was 43 years (range, 15-81 years), 58% were male, and 50% were right knees. The KFs were identified by at least 2 reviewers on the sagittal images in 96% of cases, on the axial images in 76% of cases, and on the coronal images in 4% of cases. The mean distance from the KF distal femoral insertion to the lateral joint line was 50.1 mm (SD, 6.6 mm) and the mean distance to the lateral gastrocnemius tendon origin was 10.8 mm (SD, 8.6 mm). The KFs were consistently identified immediately anterior to the superior lateral geniculate artery on sagittal imaging. Interobserver reliability for identification was best in the sagittal plane (Kappa 0.5) and worst in the coronal plane (Kappa 0.1). Conclusion: The KF complex can be identified on routine MRI sequences in the ACL-intact knee; however, there is low to moderate interobserver reliability. Imaging in the sagittal plane had the highest rate of identification and the coronal plane the lowest. There is a consistent relationship between the most distal KF femoral attachment and the lateral joint line, lateral gastrocnemius tendon, and superior lateral geniculate artery.

Magnetic Resonance Imaging to Investigate the Clinical Applicability of the Medial Femoral Trochlea Osteochondral Flap Within the Wrist

Hand ◽  
2022 ◽  
pp. 155894472110643
Author(s):  
Jimmy H. Daruwalla ◽  
Jan Skrok ◽  
Mitchell A. Pet ◽  
Aviram M. Giladi ◽  
James P. Higgins
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Sagittal Plane ◽  
Convex Surface ◽  
Radius Of Curvature ◽  
Resonance Imaging ◽  
Femoral Trochlea ◽  
Average Ratio ◽  
Mri Scans ◽  
Magnetic Resonance Imaging Mri

Background: The medial femoral trochlea (MFT) osteochondral flap is employed for reconstruction of unsalvageable scaphoid proximal pole nonunions. The convex surface of the cartilage-bearing proximal trochlea is used to replace the similarly contoured proximal scaphoid and articulate with the concave scaphoid fossa of the radius. A magnetic resonance imaging (MRI) comparison of the shape of the MFT as it relates to the native proximal scaphoid has not been previously performed. Our study aimed to quantifiably compare the shape of the MFT, proximal scaphoid, and scaphoid fossa. Methods: Using imaging processing software, we measured radius of curvature of the articular segments in MRI scans of 10 healthy subjects’ wrists and knees. Results: Compared with the scaphoid fossa, average ratio of the radius of circumference of the proximal scaphoid was 0.79 and 0.78 in the coronal and sagittal planes, respectively. Compared with the scaphoid fossa, average ratio of the radius of circumference of the MFT was 0.98 and 1.31 in the coronal and sagittal planes, respectively. The radius of curvature of the MFT was larger than the proximal scaphoid, in the coronal and sagittal planes. In the coronal plane, the MFT radius of curvature is nearly identical to the scaphoid fossa, a closer match than the scaphoid itself. In the sagittal plane, the radius of curvature of the MFT was larger than the radius of curvature of the scaphoid fossa. Conclusions: Our data suggest that the radius of curvature, in the sagittal and coronal planes, of the MFT and proximal scaphoid is disparate.

scholarly journals Magnetic resonance imaging based coracoid morphology and its associations with subscapularis tears: a new index

2017 ◽  
Vol 11 (1_suppl) ◽  
pp. 52-58 ◽  
Author(s):  
Adam C. Watson ◽  
Richard P. Jamieson ◽  
Andrew C. Mattin ◽  
Richard S. Page
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Sagittal Plane ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Resonance Imaging ◽  
Intraclass Correlation Coefficients ◽  
Arm Position ◽  
Magnetic Resonance Imaging Mri

Background We aimed to assess the validity of magnetic resonance imaging (MRI) in assessing the subcorocoid space and determine the validity of novel sagittal plane subcorocoid space measurements. Methods We assessed 33 arthroscopically proven subscapularis tears with MRIs compared to 33 (instability) controls with normal subscapularis tendons. Three examiners analyzed MRIs for seven static indices of corocoid morphology, in axial and sagittal planes. We explored reviewer variation using intraclass correlation coefficients (ICC) and differences between the two groups was explored using t-tests. Results Groups were similar in characteristics but different in age (cases = 53, controls = 23). ICC showed good (2/7) or excellent (5/7) reliability. Small differences(<1.6 mm) were identified between subscapularis tears and controls in coraco–humeral distance, in axial ( p = 0.092) and sagittal planes ( p = 0.045). There were statistically significant differences between groups when analyzing the angular projection of the coracoid from the glenoid, in both sagittal ( p < 0.0001) and axial planes ( p = 0.045). Conclusions Acute inferior angulation of the corocoid in the sagittal plane may be associated with subscapularis tears. Static indices are measured within the scapula and not affected by arm position. MRI reliably provided a platform to assess the coracoid. Based on this, we currently consider corocoplasty in patients with subscapularis tears and a sagittal coroco–glenoid angle <60o to reduce potential impingement.

scholarly journals Duplikasi Buli-Buli

2016 ◽  
Vol 1 (4) ◽  
pp. 230-234
Author(s):  
Bambang Soeprijanto
Keyword(s):  
Magnetic Resonance Imaging ◽  
Congenital Anomaly ◽  
Magnetic Resonance ◽  
Congenital Anomalies ◽  
Sagittal Plane ◽  
Resonance Imaging ◽  
Abdominal Sonography ◽  
Rare Congenital Anomaly

Duplication of the bladder is a very rare congenital anomaly that is usually associated with other congenital anomalies. We present 2 cases of babies with duplication of the bladder combined with other congenital anomalies. Abdominal sonography, genitography, lopography and magnetic resonance imaging revealed incomplete duplication of the bladder at coronal and sagittal plane and combined with other congenital anomalies. Cystourethroscopy confrm the diagnosis.

scholarly journals Role of Multiparametric Magnetic Resonance in the study of the Prostate

2020 ◽  
Author(s):  
Troncone Raffaella ◽  
Coda Marco ◽  
Aliberti Daniele ◽  
Ciccone Vincenzo ◽  
Carbone Mattia
Keyword(s):  
Magnetic Resonance Imaging ◽  
Prostate Cancer ◽  
Magnetic Resonance ◽  
Study Protocol ◽  
Sagittal Plane ◽  
Ultrasound Image ◽  
Functional Study ◽  
Targeted Biopsy ◽  
Resonance Imaging ◽  
Weighted Sequences

Magnetic resonance imaging is the fastest and least invasive diagnostic method for the study of the prostate. The method's multiparametricity allows the acquisition of the images highlighting different characteristics in relation to the different sampling sequences. In particular, the MRI investigation plays a role in: • risk stratification and staging of the tumor, therefore active surveillance • detection of prostate cancer; • localization and characterization of prostate cancer before performing a procedure (pre-biopsy, pre-surgery, or radiation therapy); • procedural guide (targeted biopsy guide). The study protocol includes T2-weighted sequences on an axial and sagittal plane, diffusion-weighted sequences for the functional study (DWI) with high b values, contrast dynamic sequences (DCE-MRI), T1-weighted sequences with a large FOV. The study protocol here presented follows the latest PI-RADS v2.1 guidelines. The axial scan plans are acquired according to the anatomical axis of the gland. In our protocol we add a further neutral T2 weighing, a sequence that will be subsequently used for the coupling of images with fusion techniques, such as target-biopsy. The adoption of PI-RAADS v2.1, the most recent update of the system, improves the assessment of intra-patient injury variability and simplifies the general assessment of the prostate in magnetic resonance imaging. The magnetic resonance examination thus obtained allows the correct overlap of the lesion anatomy with the ultrasound image TRUS acquired with the Fusion technique, used for targeted biopsy sampling.

scholarly journals Evaluation of MRI Orthogonal Planes in Differential Diagnosis of Non-Tumour Brain Lesions

2021 ◽  
Vol 10 (40) ◽  
pp. 3543-3547
Author(s):  
Smitha H. ◽  
Meena Devi V. N. ◽  
Sreekanth K. S. ◽  
Vinoo Jacob
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Sagittal Plane ◽  
Tumour Volume ◽  
Brain Lesions ◽  
Resonance Imaging ◽  
Anatomical Structures ◽  
Precise Diagnosis ◽  
Magnetic Resonance Imaging Mri

BACKGROUND Magnetic resonance imaging (MRI) provides structural characterization of brain lesions, by measuring volume of axial, sagittal and coronal planes through two dimensional slices. The purpose of this study was to characterize and identify the orthogonal imaging planes to detect non tumour lesions of brain through MRI. METHODS This study included 81 patients, both males and females, suspected of brain lesions and underwent MRI for diagnosis. The variations in the volume of the anatomical structures were measured and compared the planes as axial and sagittal, axial and coronal and coronal and sagittal for non-tumour brain lesions. RESULTS The present study revealed the differences in the measurement of volume in nontumour lesions (N = 81) in axial, sagittal and coronal planes. It was found that the volume of axial planes (9.2) is more dominant than the sagittal (9.1) and coronal planes (8.8) in non-tumour lesions. Statistical analysis was done by Statistical Package for Social Sciences (SPSS version 16 software). Two way/Friedman test were used for comparing the three groups. CONCLUSIONS This study concluded that, in most of the brain lesions irrespective of the type of tumours, axial planes helps more in the detection of tumour volume as compared to sagittal and coronal planes for precise diagnosis of brain lesions. KEY WORDS Axial Plane; Coronal Plane; Magnetic Resonance Imaging; Non-Tumour Brain Lesions; Sagittal Plane.

Delayed gadolinium-enhanced magnetic resonance imaging (dGEMRIC) of hip joint cartilage: better cartilage delineation after intra-articular than intravenous gadolinium injection

2006 ◽  
Vol 47 (4) ◽  
pp. 391-396 ◽  
Author(s):  
M. Boesen ◽  
K. E. Jensen ◽  
E. Qvistgaard ◽  
B. Danneskiold-SamsØe ◽  
C. Thomsen ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Hip Joint ◽  
Sagittal Plane ◽  
Spin Echo ◽  
Cartilage Damage ◽  
Hip Osteoarthritis ◽  
Joint Cartilage ◽  
Resonance Imaging ◽  
Ultrasound Guided

Purpose: To investigate and compare delayed gadolinium (Gd-DTPA)-enhanced magnetic resonance imaging (MRI) of cartilage (dGEMRIC) in the hip joint using intravenous (i.v.) or ultrasound-guided intra-articular (i.a.) Gd-DTPA injection. Material and Methods: In 10 patients (50% males, mean age 58 years) with clinical and radiographic hip osteoarthritis (OA; Kellgren score II–III), MRI of the hip was performed twice on a clinical 1.5T MR scanner: On day 1, before and 90–180 min after 0.3 mmol/kg body weight i.v. Gd-DTPA and, on day 8, 90–180 min after ultrasound-guided i.a. injection of a 4 mmol/l Gd-DTPA solution. Coronal STIR, coronal T1 fat-saturated spin-echo, and a cartilage-sensitive gradient-echo sequence (3D T1 SPGR) in the sagittal plane were applied. Results: Both the post-i.v. and post-i.a. Gd-DTPA images showed significantly higher signal-to-noise (SNR) and contrast-to-noise (CNR) in the joint cartilage compared to the non-enhanced images ( P<0.002). I.a. Gd-DTPA provided significantly higher SNR and CNR compared to i.v. Gd-DTPA ( P<0.01). Furthermore, a better delineation of the cartilage in the synovial/cartilage zone and of the chondral/subchondral border was observed. Conclusion: The dGEMRIC MRI method markedly improved delineation of hip joint cartilage compared to non-enhanced MRI. The i.a. Gd-DTPA provided the best cartilage delineation. dGEMRIC is a clinically applicable MRI method that may improve identification of early subtle cartilage damage and the accuracy of volume measurements of hip joint cartilage.

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