scholarly journals 592 A Large Lipoma: An Unusual Presentation of the Tongue

2021 ◽  
Vol 108 (Supplement_6) ◽  
Author(s):  
A Shathur ◽  
A Rashid ◽  
V Patel ◽  
L Ffolkes ◽  
R Jayaram
Keyword(s):  
Unknown Origin ◽  
The Body ◽  
Tongue Movement ◽  
Resonance Imaging ◽  
Patient History ◽  
Lateral Border ◽  
Soft Tissue Swelling ◽  
Magnetic Resonance Imaging Mri ◽  
And Function

Abstract Background Lipomas are commonly identified tumours of the body however they are rarely found in the oral cavity. Rarer still is it to report a case of a lipoma in the tongue as they are more commonly located in the buccal mucosa. Objectives To diagnose and explore the pathogenesis of a soft-tissue swelling of unknown origin Method A thorough patient history and clinical examination was undertaken followed by magnetic resonance imaging (MRI) which revealed an alarming report at first glance. An incisional biopsy of the lesion was then carried out to aid in diagnosing the lesion. Results The swelling caused the patient no pain however the mere size of the lesion affected the patient’s tongue movement and function which therefore affected the patient’s quality of life. The imaging and the biopsy of the lesion led to a diagnosis of a large lipoma on the lateral border of the tongue. Conclusions To the authors’ best knowledge, we present a rare case of a patient whom we diagnosed with a large lipoma on the lateral border of the tongue. This case report discusses the stages of patient management from initial presenting complaint, up to the maintenance of the patient following the diagnosis of this lesion.

scholarly journals De-noising of MRI Images in Wavelet Domain

2019 ◽  
Vol 8 (4) ◽  
pp. 1947-1949
Keyword(s):  
Signal To Noise Ratio ◽  
Histogram Equalization ◽  
The Body ◽  
Medical Procedure ◽  
Wavelet Domain ◽  
Radio Waves ◽  
Resonance Imaging ◽  
Adaptive Histogram Equalization ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI) is a diagnostic medical procedure that utilizes solid attractive fields and radio waves to deliver definite pictures of within the body. Extensive research has been completed into whether the attractive fields and radio waves utilized during MRI sweeps could represent a hazard to the human body. No proof has been found to propose there's a hazard, which means MRI outputs are one of the most secure restorative methodology accessible. MRI has several advantages which make it ideal in numerous situations, in particular, it can identify small changes of structures inside the body. The disadvantage is the noise that degrades the quality of the image. A threestep processing algorithm is proposed to reduce this noise. Here, first it includes soft thresholding in wavelet domain where the original image is divided into blocks that do not overlap. Then it includes restoration of the object boundaries and texture which are lost as a result of the first step and finally enhancing the image using CLAHE (Contrast Limiting Adaptive Histogram Equalization). It is then analyzed using the error parameters like peak signal to noise ratio and mean square error.

scholarly journals Current approaches to development of contrast agents for MRI diagnostics

2011 ◽  
Vol 10 (6) ◽  
pp. 79-85 ◽  
Author(s):  
K. N. Sorokina ◽  
A. A. Tulupov ◽  
T. G. Tolstikova ◽  
V. Yu. Ussov
Keyword(s):  
Contrast Agents ◽  
The Body ◽  
Resonance Imaging ◽  
Early Diagnostics ◽  
Precise Diagnosis ◽  
Targeted Contrast Agents ◽  
Magnetic Resonance Imaging Mri ◽  
And Function ◽  
Mri Diagnostics ◽  
Areas Of Interest

Magnetic resonance imaging (MRI) is primarily used in medical imaging to visualize the structure and function of the body and essential tool for diagnostics of broad range of pathologies. But still in a growing number of cases there are indications to use contrast agent to delineate areas of interest and for more precise diagnosis definition. In a review the properties and clinical applications of most popular paramagnetic contrast agents based on Gd(III), Fe(II) и Mn(II) are discussed. It is also focused on discussion of modern experimental targeted contrast agents (conjugates of antibodies, nanoparticles and dendrimers) and advances of their application for early diagnostics of most common pathologies: cardiovascular, cancer and Alzheimer diseases.

Gadolinium In Medicine-An Evaluation and Update

2020 ◽  
pp. 1-7
Author(s):  
Blaurock-Busch Eleonore
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Chelating Agents ◽  
The Body ◽  
Imaging Procedures ◽  
Resonance Imaging ◽  
Intravenous Drugs ◽  
Gadolinium Retention ◽  
Magnetic Resonance Imaging Mri

Gadolinium-Based Contrast Agents (GBCA) are intravenous drugs used in diagnostic imaging procedures to enhance the quality of Magnetic Resonance Imaging (MRI) or Magnetic Resonance Angiography (MRA). FDA alerts concerning potential side effects increased patient and medical concerns. More recent FDA information indicate that ionic gadolinium is released from some GBCAs, potentially causing gadolinium toxicity. We checked if gadolinium is excreted renally without intervention after previous administration of GBCAs, and if chelating agents are effective in removing gadolinium that may have remained in the body after GBCA administration. Through the evaluation of our internal database and the studies of others, we concluded that no clear consensus exists at this time. While the DTPAs may be the choice of chelators for the removal of gadolinium from the human body, further studies are needed to prove this. It seems clear, however, that microcyclic GBCAs provide a lesser risk of causing gadolinium retention and gadolinium toxicity symptoms.

Magnetic Resonance Imaging in the Diagnosis of Disruption of the Posterior Tibial Tendon

Foot & Ankle ◽  
1987 ◽  
Vol 8 (3) ◽  
pp. 144-147 ◽  
Author(s):  
Ian J. Alexander ◽  
Kenneth A. Johnson ◽  
Thomas H. Berquist
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissues ◽  
Diagnostic Technique ◽  
Clinical Findings ◽  
The Body ◽  
Posterior Tibial Tendon ◽  
Resonance Imaging ◽  
Posterior Tibial ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI), a useful technique of studying soft tissues of the body, can be very effective in assessing the integrity of tendons. Usually a patient with a complete tear of the posterior tibial tendon has characteristic physical findings. In the patient presented, MRI demonstrated a complete disruption of the posterior tibial tendon, despite the absence of the commonly associated clinical findings. In view of the difficulties encountered with attempted tenography of the completely torn posterior tibial tendon, MRI provides a sensitive alternative diagnostic technique.

scholarly journals Mycobacteria Infection in Incomplete Transverse Myelitis Is Refractory to Steroids: A Pilot Study

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Yanqing Feng ◽  
Ning Guo ◽  
Junxiu Liu ◽  
Xi Chen ◽  
Qiaosong Sun ◽  
...  
Keyword(s):  
Spinal Injury ◽  
Transverse Myelitis ◽  
Unknown Origin ◽  
Resonance Imaging ◽  
Open Label ◽  
Open Label Study ◽  
Antituberculous Treatment ◽  
Methylprednisolone Treatment ◽  
Magnetic Resonance Imaging Mri ◽  
Over Time

Incomplete transverse myelitis (ITM) of unknown origin is associated with high rates of morbidity and mortality. This prospective, open-label study was undertaken to determine whether antituberculous treatment (ATT) might help patients with ITM whose condition continues to deteriorate despite receiving IV methylprednisolone treatment. The study consisted of 67 patients with steroid-refractory ITM in whomMycobacterium tuberculosis(MTB) was suspected clinically and in whom other known causes of myelopathy were excluded. The study occurred from January 2003 to June 2010. Patients underwent trial chemotherapy with ATT. Efficacy was assessed by the American Spinal Injury Association (ASIA) scoring system, the Barthel Index (BI) and the Hauser Ambulation Index (AI) at baseline, 12 months, and 24 months, using magnetic resonance imaging (MRI). Of the 67 patients enrolled, 51 were assessed and 16 withdrew. At 24 months, 49 patients experienced benefits as indicated by significantly increased ASIA and BI scores. The Hauser AI index also improved with markedly decreased abnormal signals in spinal cord MRI over time. The results from this prospective study provide beneficial clinical and MRI data on the efficacy of ATT in ITM patients and suggests mycobacteria may be an important and neglected cause of myelitis.

scholarly journals A study of the sensitivity and specificity of the Magnetic Resonance Imaging (MRI) technique used in the diagnosis of endometriosis versus the intraoperative appearance considered the reference standard in the diagnosis of endometriosis

2021 ◽  
Vol 28 (1) ◽  
pp. 55-61
Author(s):  
Alexandra RADU ◽  
◽  
Elvira BRATILA ◽  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Sensitivity And Specificity ◽  
Reference Standard ◽  
Resonance Imaging ◽  
First Line ◽  
Magnetic Resonance Imaging Mri ◽  
Asymptomatic Women ◽  
Bladder Invasion

Endometriosis is a gynecological pathology with chronic symptoms, which negatively affects the patient’s quality of life. The prevalence of endometriosis in asymptomatic women is between 2% and 50%, depending on the populations studied and the method of diagnosis. The severity of the symptoms as well as the probability of diagnosing endometriosis increases with age9. Because endometriosis is a gynecological condition with a nonspecific clinical picture, sometimes even asymptomatic, imaging technology can be considered the first line of diagnosis for this pathology. The main objective of this study is to evaluate the sensitivity and specificity of nuclear magnetic resonance imaging (MRI) used in the diagnosis of endometriotic lesions depending on their location, and compare the results obtained with the intraoperative appearance considered a reference standard in the diagnosis of endometriosis. Our study revealed the highest specificity for MRI in the case of endometriotic bladder invasion, respectively the highest sensitivity for endometriotic rectal nodules.

Strength, Size, and Muscle Quality in the Upper Arm following Unilateral Training in Younger and Older Males and Females

2009 ◽  
Vol 2 ◽  
pp. CMAMD.S1180 ◽  
Author(s):  
Leah C. Tanton ◽  
Thomas A. Cappaert ◽  
Paul M. Gordon ◽  
Robert F. Zoeller ◽  
Theodore J. Angelopoulos ◽  
...  
Keyword(s):  
Muscle Quality ◽  
Resonance Imaging ◽  
Age And Gender ◽  
Males And Females ◽  
Older Subjects ◽  
Magnetic Resonance Imaging Mri ◽  
And Gender ◽  
Unilateral Training ◽  
Older Males

Purpose To assess strength, size, and muscle quality differences between younger and older males and females in response to training. Methods The bicep and tricep of the non-dominant arm were trained for twelve weeks in younger and older males and females (n = 41). The bicep of both arms were assessed pre and post for muscle strength using one-repetition maximum (1 RM) testing, and size using magnetic resonance imaging (MRI). Results Strength (p < 0.05), mCSA (p < 0.05), and 1 RM MQ (p < 0.00) increased in response to training in all subjects regardless of age or gender. Younger and older subjects had similar increases in strength (45.49 ± 15.30% vs. 42.67 ± 26.67% respectively), mCSA (16.22 ± 7.98% vs. 19.17 ± 6.19% respectively), and 1RM MQ (25.73 ± 15.76 vs. 19.67 ± 20.66 respectively). Women increased their strength (55.59 ± 19.45% vs. 32.87 ± 15.66% p < 0.00 respectively), size (20.36 ± 6.29% vs. 14.72 ± 7.28% p < 0.02 respectively), and 1 RM MQ (29.74 ± 18.33% vs. 16.30 ± 15.59% p <.02) more than men. In comparing age and gender, younger females increased their strength more than older males (56.42 ± 12.92% vs. 29.17 ± 21.8% p <.02 respectively). Older females also increased their strength more than older males (54.68 ± 25.73 vs. 29.17 ± 21.80% respectively). Younger females increased their 1 RM MQ more than older males (.18 ± .08 kg/cm vs. .06 ± .08 kg/cm p <.02 respectively). Conclusion Strength and mCSA increases similarly in older and younger subjects. However, the overall strength and quality of the muscle seems to improve more in women than in men.

Inter-Observer Variability of Vaginal Wall Segmentation From MRI: A Statistical Shape Analysis Approach

2015 ◽  
Author(s):  
Deanna C. Easley ◽  
Prahlad G. Menon ◽  
Pamela A. Moalli ◽  
Steven D. Abramowitch
Keyword(s):  
Shape Matching ◽  
Pelvic Floor Disorders ◽  
Pelvic Organ ◽  
Vaginal Wall ◽  
Resonance Imaging ◽  
Inter Observer Variability ◽  
Statistical Shape ◽  
Mri Scans ◽  
Magnetic Resonance Imaging Mri

Pelvic floor disorders such as Pelvic Organ Prolapse (POP) negatively impact the health and quality of life of millions of women worldwide. POP is characterized by the descent of the pelvic organs into the vagina due to compromised connective tissue support, resulting in discomfort and urinary/fecal incontinence. Magnetic Resonance Imaging (MRI) has been used to aid in the quantification of these anatomical changes, however the inter- and intra-observer repeatability necessary to make reliable conclusions about changes in anatomical positioning is questioned using current methods. The aim of this study was to quantify the degree of variability produced from inter-observer manual tracings of the vagina from MRI scans using a statistical shape matching approach.

scholarly journals Incidence of intraspinal abnormalities in congenital scoliosis: a systematic review and meta-analysis

2020 ◽  
Vol 15 (1) ◽  
Author(s):  
Xudong Wang ◽  
Yangke Yu ◽  
Ningning Yang ◽  
Lei Xia
Keyword(s):  
Systematic Review ◽  
Meta Analysis ◽  
Tethered Cord ◽  
Congenital Scoliosis ◽  
Cochrane Library ◽  
Resonance Imaging ◽  
R Software ◽  
Dural Ectasia ◽  
Magnetic Resonance Imaging Mri

Abstract Objective This is the first systematic review and meta-analysis on the overall incidence of intraspinal abnormalities in patients with congenital scoliosis (CS) and potential influencing factors. Methods We searched three large electronic databases (PubMed, EMBASE, and Cochrane Library) for potentially relevant studies. The quality of the included studies was assessed independently by two authors using the Methodological Index for Non-Randomized Studies (MINORS) criteria. Data on the number of CS patients, number of CS patients with intraspinal abnormalities, sex of the patients, and CS types were extracted from the included studies. R software was used to pool and analyze all the extracted data. Results This meta-analysis included 10 articles, and 671 of 1863 CS patients undergoing magnetic resonance imaging (MRI) examinations were identified to have intraspinal abnormalities. The overall incidence of intraspinal abnormalities in the patients with CS was 37% (95% CI, 29–45%). Diastematomyelia was the most common intraspinal abnormality and was detected in 45.60% of the patients with intraspinal abnormalities (306/671). The remaining intraspinal abnormalities included syringomyelia (273/671, 40.69%), tethered cord (190/671, 28.32%), low conus (58/671, 8.64%), intraspinal mass (39/671, 5.81%), Chiari malformation (32/671, 4.77%), fatty filum (27/671, 4.02%), spina bifida (occulta excluded) (17/671, 2.53%), tumor (17/671, 2.53%), cyst (12/671, 1.79%), syringomyelus (4/671, 0.60%), dural ectasia (1/671, 0.15%), and undiagnosed cord MRI hyperintensity (1/671, 0.15%). The patient’s sex and CS type were not factors that affected the incidence of intraspinal abnormalities in CS patients (all P > 0.05). Conclusions This meta-analysis revealed that the overall incidence of intraspinal abnormalities detected by MRI in CS patients was 37%. Diastematomyelia was the most common intraspinal abnormality. The patient’s sex and CS type were not factors that affected the incidence of intraspinal abnormalities in CS patients.

scholarly journals A quick guide to safety and compatibility of passive implants and devices in an MR environment

2004 ◽  
Vol 8 (2) ◽  
pp. 6 ◽  
Author(s):  
D.J. Kotze ◽  
C. De Vries
Keyword(s):  
Resonance Imaging ◽  
Electrical Currents ◽  
Additional Risk ◽  
Metal Implants ◽  
Passive Devices ◽  
Number Of Patients ◽  
Magnetic Resonance Imaging Mri ◽  
Mr Safe ◽  
Intended Use

An increasing number of patients with metal implants are being referred for magnetic resonance imaging (MRI) investigations. Implants and devices may be divided into two groups, namely active and passive. This article will focus on passive devices. A device is MR-safe when it is used in the MR environment, but presents no additional risk to the patient or other individuals, although the quality of diagnostic information may be affected. MR procedures may be contraindicated due to various interactions between the MR environment and medical devices, which include torque, translational force, heating, induced electrical currents, magnetic field interactions, artefacts, and misrepresentation. Therefore, before deciding whether any object is MRsafe/ compatible, the intended use and the possible retaining mechanisms must be considered.

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