scholarly journals Synchronous imaging of pelvic geometry and muscle morphometry: a pilot study of pelvic retroversion using upright MRI

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Noor Shaikh ◽  
Honglin Zhang ◽  
Stephen H. M. Brown ◽  
Hamza Lari ◽  
Oliver Lasry ◽  
...  
Keyword(s):  
Pelvic Tilt ◽  
Pelvic Incidence ◽  
Sacral Slope ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Future Studies ◽  
Upright Mri ◽  
Asymptomatic Volunteers ◽  
Good Repeatability ◽  
Magnetic Resonance Imaging Mri

AbstractThis study investigated feasibility of imaging lumbopelvic musculature and geometry in tandem using upright magnetic resonance imaging (MRI) in asymptomatic adults, and explored the effect of pelvic retroversion on lumbopelvic musculature and geometry. Six asymptomatic volunteers were imaged (0.5 T upright MRI) in 4 postures: standing, standing pelvic retroversion, standing 30° flexion, and supine. Measures included muscle morphometry [cross-sectional area (CSA), circularity, radius, and angle] of the gluteus and iliopsoas, and pelvic geometry [pelvic tilt (PT), pelvic incidence (PI), sacral slope (SS), L3–S1 lumbar lordosis (LL)] L3-coccyx. With four volunteers repeating postures, and three raters assessing repeatability, there was generally good repeatability [ICC(3,1) 0.80–0.97]. Retroversion had level dependent effects on muscle measures, for example gluteus CSA and circularity increased (up to 22%). Retroversion increased PT, decreased SS, and decreased L3–S1 LL, but did not affect PI. Gluteus CSA and circularity also had level-specific correlations with PT, SS, and L3–S1 LL. Overall, upright MRI of the lumbopelvic musculature is feasible with good reproducibility, and the morphometry of the involved muscles significantly changes with posture. This finding has the potential to be used for clinical consideration in designing and performing future studies with greater number of healthy subjects and patients.

scholarly journals Magnetic resonance imaging template to standardize reporting of anal fistulas

2021 ◽  
Author(s):  
I. Sudoł-Szopińska ◽  
G. A. Santoro ◽  
M. Kołodziejczak ◽  
A. Wiaczek ◽  
U. Grossi
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Treatment Strategies ◽  
Cross Sectional Study ◽  
Resonance Imaging ◽  
Anal Fistulas ◽  
Cross Sectional ◽  
Radiology Reports ◽  
Colorectal Surgeons ◽  
Magnetic Resonance Imaging Mri

AbstractAnal fistula (AF) is a common referral to colorectal surgeons. Management remains challenging and sometimes controversial. Magnetic resonance imaging (MRI) is commonly performed in initial workup for AF. However, reports often lack key information for guiding treatment strategies. It has been shown that with structured radiology reports, there is less missing information. We present a structured MRI template report including 8 key descriptors of anal fistulas, whose effectiveness and acceptability are being assessed in a cross-sectional study (NCT04541238).

scholarly journals Relationship between abnormalities detected by magnetic resonance imaging and knee symptoms in early knee osteoarthritis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Seiya Ota ◽  
Eiji Sasaki ◽  
Shizuka Sasaki ◽  
Daisuke Chiba ◽  
Yuka Kimura ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Knee Osteoarthritis ◽  
Cartilage Damage ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Radiographic Evidence ◽  
Cross Sectional ◽  
Meniscal Lesions ◽  
Magnetic Resonance Imaging Mri

AbstractWe investigated the prevalence of magnetic resonance imaging (MRI) findings and their relationship with knee symptoms in women without radiographic evidence of knee osteoarthritis (KOA). This cross-sectional cohort study included 359 Japanese women without radiographic evidence of KOA (Kellgren‒Lawrence grade < 2). All participants underwent T2-weighted fat-suppressed MRI of their knees. Structural abnormalities (cartilage damage, bone marrow lesions [BMLs], subchondral cysts, bone attrition, osteophytes, meniscal lesions, and synovitis) were scored according to the whole-organ MRI score method. Knee symptoms were evaluated using the Knee Injury and Osteoarthritis Outcome Score. Participants were divided into early and non-KOA groups based on early KOA classification criteria. Logistic regression analysis was performed to evaluate the relationship between MRI abnormalities and knee symptoms. Cartilage damage was the most common abnormality (43.5%). The prevalences of cartilage damage, BMLs, subchondral cysts, bone attrition, meniscal lesions, and synovitis were higher in patients with early KOA than in those without. Synovitis (odds ratio [OR] 2.254, P = 0.002) and meniscal lesions (OR 1.479, P = 0.031) were positively associated with the presence of early KOA. Synovitis was most strongly associated with knee pain and might be a therapeutic target in patients with early KOA.

Magnetic resonance imaging studies on autism and childhood-onset schizophrenia in children and adolescents – a review

2003 ◽  
Vol 15 (3) ◽  
pp. 140-147
Author(s):  
Bertine Lahuis ◽  
Chantal Kemner ◽  
Herman Van Engeland
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Children And Adolescents ◽  
Resonance Imaging ◽  
Childhood Onset ◽  
Cross Sectional ◽  
Medline Search ◽  
Childhood Onset Schizophrenia ◽  
Magnetic Resonance Imaging Mri ◽  
Study Designs

Objective:To find out whether the neurodevelopmental disorders autism and childhood-onset schizophrenia have a common developmental pathway and whether the abnormalities detected are ‘disorder-specific’, by reviewing magnetic resonance imaging (MRI) studies.Methods:As a result of a Medline search, we were able to access 28 studies on autism and 12 studies on childhood-onset schizophrenia, which focused on children and adolescents.Results:Larger lateral ventricles were found to be a common abnormality in both disorders. ‘Disorder-specific’ abnormalities in patients with autism were larger brains, a larger thalamic area, and a smaller right cingulate gyrus. Subjects with childhood-onset schizophrenia were found to have smaller brains, a smaller amygdalum and thalamus, and a larger nucleus caudatus. In subjects with childhood-onset schizophrenia, abnormalities appeared to progress over a limited period of time.Conclusions:Because the study designs varied so much, the results should be interpreted cautiously. Before abnormalities found in the disorders can be designated as equal or ‘disorder-specific’, it will be essential to perform large longitudinal and cross-sectional follow-up studies.

scholarly journals Spinopelvic Parameters Do Not Predict the Sagittal Orientation of the Acetabulum

2020 ◽  
Vol 8 (10) ◽  
pp. 232596712095742
Author(s):  
Munif Hatem ◽  
Scott J. Nimmons ◽  
Anthony Nicholas Khoury ◽  
Hal David Martin
Keyword(s):  
Pelvic Incidence ◽  
Sagittal Plane ◽  
Cross Sectional Study ◽  
Sacral Slope ◽  
Spinopelvic Parameters ◽  
Level Of Evidence ◽  
Cross Sectional ◽  
Spinopelvic Parameter ◽  
Magnetic Resonance Arthrogram ◽  
Sagittal Orientation

Background: The orientation of the acetabulum has a fundamental role in impingement and instability of the hip, and the spinopelvic parameters are thought to predict the sagittal orientation of the acetabulum (SOA). However, similar to the acetabular version (axial orientation) and inclination (coronal orientation), the cephalic or caudal orientation of the acetabulum in the sagittal plane, or SOA, may primarily be an intrinsic feature of the acetabulum itself. Purpose: To determine whether the spinopelvic parameters predict the sagittal orientation of the acetabulum in individuals without lumbar deformity. Study Design: Cross-sectional study; Level of evidence, 4. Methods: A retrospective analysis was performed in 89 patients (94 hips; 62 female, 27 male; mean ± SD age, 45.9 ± 15.4 years) without lumbosacral deformity who underwent magnetic resonance arthrogram (MRA) for assessment of hip pain. The SOA was determined in the sagittal cut MRA. A line was drawn at the distal limit of the anterior and posterior acetabular horns longitudinally to the transverse ligament, and the angle between this line and the axial plane represented the SOA. The sacral slope, pelvic incidence, and spinopelvic tilt were determined using a 3-dimensional cursor and the axial, sagittal, and coronal cuts. All MRA studies were performed with the patient in the supine position. Results: The SOA had a mean ± SD cephalic orientation of 18° ± 6.6°. No significant correlation was observed between the SOA and the sacral slope ( r = –0.03; P = .77). A weak correlation was observed between the SOA and the pelvic incidence ( r = 0.22; P = .03) and between the SOA and the spinopelvic tilt ( r = 0.41; P < .01). Conclusion: The SOA cannot be presumed based on the spinopelvic parameter. Similar to the well-known parameters to assess the axial and coronal orientation of the acetabulum, the assessment of the SOA demands acetabular-specific parameters. Additional studies are necessary to assess the SOA in asymptomatic hips, including disparities between genders. Clinically significant values for abnormal SOA of the acetabulum remain to be defined.

Imaging

2017 ◽  
Author(s):  
Robert Laureno
Keyword(s):  
Resonance Imaging ◽  
Cross Sectional ◽  
Advantages And Disadvantages ◽  
Mri Scans ◽  
Cross Sectional Imaging ◽  
Magnetic Resonance Imaging Mri ◽  
Cellular Pathology ◽  
Brain And Spinal Cord ◽  
The Brain

This chapter on “Imaging” examines the relative advantages and disadvantages of computed tomography (CT) and magnetic resonance imaging (MRI) scans. It compares the modalities to each other and to gross neuropathology. For several decades, neurologists have been able to view cross-sectional images of living patients. Analogous to gross neuropathology, cross-sectional imaging displays the brain as an entire organ but does not demonstrate microscopic tissue or cellular pathology. By allowing practitioners to view sections of brain and spinal cord in vivo, imaging has improved neurologic practice and facilitated clinical research. This chapter deals with imaging topics that are important to the neurologist. The timing of scans, the effects of gravity, and the importance of plane of section are considered. Imaging is compared to gross neuropathology, and MRI is compared to CT.

scholarly journals Optimal Cut-Off Value of the Superior Articular Process Area as a Morphological Parameter to Predict Lumbar Foraminal Stenosis

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Tae-Ha Lim ◽  
Soo Il Choi ◽  
Hyung Rae Cho ◽  
Keum Nae Kang ◽  
Chang Joon Rhyu ◽  
...  
Keyword(s):  
Facet Joint ◽  
Control Group ◽  
Foraminal Stenosis ◽  
Morphological Parameter ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Lumbar Foraminal Stenosis ◽  
Articular Process ◽  
Magnetic Resonance Imaging Mri ◽  
Bone Margin

Background. We devised a new morphological parameter called the superior articular process area (SAPA) to evaluate the connection between lumbar foraminal stenosis (LFS) and the superior articular process. Objective. We hypothesized that the SAPA is an important morphologic parameter in the diagnosis of LFS. Methods. All patients over 60 years of age were included. Data regarding the SAPA were collected from 137 patients with LFS. A total of 167 control subjects underwent lumbar magnetic resonance imaging (MRI) as part of a routine medical examination. We analyzed the cross-sectional area of the bone margin of the superior articular process at the level of L4-L5 facet joint in the axial plane. Results. The average SAPA was 96.3±13.6 mm2 in the control group and 128.1±17.2 mm2 in the LFS group. The LFS group was found to have significantly higher levels of SAPA (p<0.001) in comparison to the control group. In the LFS group, the optimal cut-off value was 112.1 mm2, with 84.4% sensitivity, 83.9% specificity, and AUC of 0.94 (95% CI: 0.91–0.96). Conclusions. Higher SAPA values were associated with a higher possibility of LFS. These results are important in the evaluation of patients with LFS.

Spinopelvic Characteristics in Acetabular Retroversion: Does Pelvic Tilt Change After Periacetabular Osteotomy?

2019 ◽  
Vol 48 (1) ◽  
pp. 181-187 ◽  
Author(s):  
George Grammatopoulos ◽  
Saif Salih ◽  
Paul E. Beaule ◽  
Johan Witt
Keyword(s):  
Pelvic Tilt ◽  
Pelvic Incidence ◽  
Pelvic Ring ◽  
Periacetabular Osteotomy ◽  
Case Series ◽  
Acetabular Retroversion ◽  
Sacral Slope ◽  
Anterior Pelvic Plane ◽  
Level Of Evidence ◽  
Pelvic Position

Background: Acetabular retroversion may lead to impingement and pain, which can be treated with an anteverting periacetabular osteotomy (aPAO). Pelvic tilt influences acetabular orientation; as pelvic tilt angle reduces, acetabular version reduces. Thus, acetabular retroversion may be a deformity secondary to abnormal pelvic tilt (functional retroversion) or an anatomic deformity of the acetabulum and the innominate bone (pelvic ring). Purpose: To (1) measure the spinopelvic morphology in patients with acetabular retroversion and (2) assess whether pelvic tilt changes after successful anteverting PAO (aPAO), thus testing whether preoperative pelvic tilt was compensatory. Study Design: Case series; Level of evidence, 4. Methods: A consecutive cohort of 48 hips (42 patients; 30 ± 7 years [mean ± SD]) with acetabular retroversion that underwent successful aPAO was studied. Spinopelvic morphology (pelvic tilt, pelvic incidence, anterior pelvic plane, and sacral slope) was measured from computed tomography scans including the sacral end plate in 21 patients, with adequate images. In addition, the change in pelvic tilt with aPAO was measured via the sacrofemoral-pubic angle with supine pelvic radiographs at an interval of 2.5 ± 2 years. Results: The spinopelvic characteristics included a pelvic tilt of 4° ± 4°, a sacral slope of 39° ± 9°, an anterior pelvic plane angle of 11° ± 5°, and a pelvic incidence of 42° ± 10°. Preoperative pelvic tilt was 4° ± 4° and did not change postoperatively (4° ± 4°) ( P = .676). Conclusion: Pelvic tilt in acetabular retroversion was within normal parameters, illustrating “normal” sagittal pelvic balance and values similar to those reported in the literature in healthy subjects. In addition, it did not change after aPAO. Thus, acetabular retroversion was not secondary to a maladaptive pelvic tilt (functional retroversion). Further work is required to assess whether retroversion is a reflection of a pelvic morphological abnormality rather than an isolated acetabular abnormality. Treatment of acetabular retroversion should focus on correcting the deformity rather than attempting to change the functional pelvic position.

Technology Assessment in Different Nations and Lessons from a Cross-Sectional Survey of Magnetic Resonance Imaging (MRI) Diffusion

1985 ◽  
Vol 1 (3) ◽  
pp. 515-536 ◽  
Author(s):  
Paul F. Gross
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cost Effectiveness ◽  
Magnetic Resonance ◽  
Medical Technology ◽  
Resonance Imaging ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Magnetic Resonance Imaging Mri ◽  
Diagnostic Modalities ◽  
Made In

Magnetic resonance imaging (MRI) is a rapidly evolving medical technology which has become widely diffused before comprehensive assessment of its safety, efficacy, cost-effectiveness, and relative cost-effectiveness compared with diagnostic modalities that it seems most likely to replace could be made. In early 1982 there were fewer than ten units worldwide. In August 1984, there were about 150 units and the figure will be closer to 300 by the end of 1985.

scholarly journals Comparison of Echocardiography and Computed Tomography/Magnetic Resonance Imaging for Assessing of Pulmonary Vein Stenosis in Children

2020 ◽  
pp. 75-79
Author(s):  
Y. Mykychak ◽  
D. Kozhokar ◽  
I. Yusifli ◽  
A. Morkovkina ◽  
R. Tammo ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Pulmonary Vein ◽  
Pulmonary Veins ◽  
Pulmonary Vein Stenosis ◽  
Resonance Imaging ◽  
Cross Sectional ◽  
Imaging Tool ◽  
Magnetic Resonance Imaging Mri

Pulmonary vein (PV) stenosis is a rare disease with high recurrence and mortality rates. Objective. This study was aimed to evaluate the diagnostic accuracy of echocardiography versus cross-sectional modalities. Material and methods. Our study includes 11 consecutive patients who underwent a comprehensive PV anatomy assessment between April 2018 and June 2019 at Ukrainian Children’s Cardiac Center, Kyiv. Echocardiographic studies of each pulmonary vein followed by computed tomography (CT) or magnetic resonance imaging (MRI) were performed in all patients. A total of 27 CT/MRI studies were performed. Results. There were four patients whose echocardiography findings were completely confirmed by CT/MRI method. In some patients significant stenosis was underestimated by echocardiography. Sensitivity and specificity were 86.4 and 88.9 for echo, as well as 100 and 94.4 for CT/MRI, respectively. Conclusion. This study recognizes the limitations of echocardiography as an imaging tool for pulmonary veins morphology assessment. Cross-sectional studies overcome these limitations and provide excellent morphological as well as functional (MRI) evaluation of pulmonary veins.

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