MRI versus CT for Detecting Acute Intracerebral Hemorrhage in Stroke Patients

Suspected Stroke

This chapter, found in the headache section of the book, provides a succinct synopsis of a key study comparing the use of computed tomography (CT) and magnetic resonance imaging (MRI) scans for detecting acute intracerebral hemorrhage in stroke patients. This summary outlines the study methodology and design, major results, limitations and criticisms, related studies and additional information, and clinical implications. The researchers found that MRI is as accurate as CT for detecting acute hemorrhage in suspected stroke and is more accurate than CT for detecting chronic intracerebral hemorrhage. In addition to outlining the most salient features of the study, a clinical vignette and imaging example are included in order to provide relevant clinical context.

Abnormal MRI of the Lumbar Spine without Back Pain

10.1093/med/9780190223700.003.0013 ◽

2016 ◽

Author(s):

Christoph I. Lee

Keyword(s):

Back Pain ◽

Lumbar Spine ◽

Incidental Findings ◽

Clinical Implications ◽

Resonance Imaging ◽

Clinical Context ◽

Additional Information ◽

Study Methodology ◽

This chapter, found in the back pain section of the book, provides a succinct synopsis of a key study examining incidental findings on magnetic resonance imaging (MRI) of the lumbar spine in patients without back pain. This summary outlines the study methodology and design, major results, limitations and criticisms, related studies and additional information, and clinical implications. The study showed that many people without back pain have disk bulges or protrusions on imaging of the lumbar spine, but that these findings are frequently coincidental and should not necessarily lead to further tests or interventions. In addition to outlining the most salient features of the study, a clinical vignette and imaging example are included in order to provide relevant clinical context.

Efficacy of Screening Breast MRI for High-Risk Women

10.1093/med/9780190223700.003.0039 ◽

2016 ◽

Author(s):

Christoph I. Lee

Keyword(s):

High Risk ◽

Breast Magnetic Resonance Imaging ◽

Breast Mri ◽

Resonance Imaging ◽

Additional Information ◽

High Risk Women ◽

Study Methodology ◽

Breast Magnetic Resonance ◽

Higher Sensitivity

This chapter, found in the cancer screening and management section of the book, provides a succinct synopsis of a key study examining the efficacy of screening breast magnetic resonance imaging (MRI) for high-risk women. This summary outlines the study methodology and design, major results, limitations and criticisms, related studies and additional information, and clinical implications. Breast MRI screening has higher sensitivity than mammography for high-risk women, but both the specificity and positive predictive value are lower than for mammography screening. In addition to outlining the most salient features of the study, a clinical vignette and imaging example are included in order to provide relevant clinical context.

Magnetic Resonance Imaging for Low Back Pain

10.1093/med/9780190223700.003.0012 ◽

2016 ◽

Author(s):

Michael E. Hochman

Keyword(s):

Low Back Pain ◽

Back Pain ◽

Magnetic Resonance ◽

Functional Outcomes ◽

Low Back ◽

Resonance Imaging ◽

Additional Information ◽

Study Methodology ◽

This chapter, found in the back pain section of the book, provides a succinct synopsis of a key study examining the use of magnetic resonance imaging (MRI) for low back pain. This summary outlines the study methodology and design, major results, limitations and criticisms, related studies and additional information, and clinical implications. Researchers concluded that although spinal MRIs (compared with plain radiographs) are reassuring for patients with low back pain, they do not lead to improved functional outcomes; also, spinal MRIs detect anatomical abnormalities that would otherwise go undiscovered, possibly leading to spinal surgeries of uncertain value. In addition to outlining the most salient features of the study, a clinical vignette and imaging example are included in order to provide relevant clinical context.

Follow-Up MRI for Sciatica

10.1093/med/9780190223700.003.0014 ◽

2016 ◽

Author(s):

Christoph I. Lee

Keyword(s):

Back Pain ◽

Clinical Implications ◽

Resonance Imaging ◽

Disk Herniation ◽

Clinical Context ◽

Additional Information ◽

Study Methodology ◽

This chapter, found in the back pain section of the book, provides a succinct synopsis of a key study examining the use of follow-up magnetic resonance imaging (MRI) for patients with sciatica. This summary outlines the study methodology and design, major results, limitations and criticisms, related studies and additional information, and clinical implications. Researchers concluded that the presence of disk herniation on MRI at 1-year follow-up after treatment for sciatica does not help distinguish between favorable and unfavorable clinical outcomes. In addition to outlining the most salient features of the study, a clinical vignette and imaging example are included in order to provide relevant clinical context.

Magnetic resonance imaging (MRI) scans in patients with dorsal root ganglion stimulation

Pain Practice ◽

10.1111/papr.13067 ◽

2021 ◽

Author(s):

Marco Reining ◽

Dirk Winkler ◽

Joachim Boettcher ◽

Juergen Meixensberger ◽

Michael Kretzschmar

Keyword(s):

Magnetic Resonance ◽

Dorsal Root Ganglion ◽

Dorsal Root ◽

Resonance Imaging ◽

Mri Scans ◽

Anatomic imaging study of luminal diameter of the circle of Willis in patients with ischemic stroke

Calabar Journal of Health Sciences ◽

10.25259/cjhs_50_2020 ◽

2021 ◽

Vol 5 ◽

pp. 75-80

Author(s):

Samson Omini Paulinus ◽

Benjamin Effiong Udoh ◽

Samuel A. Efanga ◽

Gabriel Udo Udo-Affah ◽

Eru Mba Eru ◽

...

Keyword(s):

Ischemic Stroke ◽

Imaging Study ◽

Circle Of Willis ◽

Luminal Diameter ◽

Software Applications ◽

Descriptive Research ◽

Mri Scans ◽

Nigerian Population ◽

Suspected Stroke

Objectives: Stroke or cerebrovascular accident is associated with defects in the circle of Willis; the vascular network that supplies the brain. There is currently lack of literature on the involvement of the circle of Willis in patients with stroke or its association with impending stroke. The objective of the study was to evaluate luminal diameter of arteries that constitute the circle of Willis in patients with stroke using computed tomography angiography (CTA) and magnetic resonance imaging (MRI) scans. Material and Methods: Angiograms of 340 male and female patients aged 15–>75 (40.18 ± 1.1 and 43.68 ± 1.18) years with suspected stroke, referred for either brain CTA or MRI in selected hospitals/diagnostic centers in Nigeria were evaluated using RadiAnt and the MicroDicom viewer software applications. A retrospective descriptive research design was adopted with approval from the federal health research ethics committee. Direct measurement of luminal diameter of major arteries of the circle of Willis was done using SPSS version 25 at P < 0.05. Results: From the 340 images assessed, 256 (75.29%) patients had ischemic stroke with luminal diameter of arteries of the circle of Willis ranged from 1 mm to >3 mm while 84 (24.71%) patients were without stroke with luminal diameter ranged from 1 mm to 2.11 mm (P < 0.05). Conclusion: Patients with stroke have larger luminal diameter of arteries that form the circle of Willis when compared to patients without stroke. The study has established for the 1st time, luminal diameter of circle of Willis that may be an index in the sampled Nigerian population.

Diagnostic value of magnetic resonance imaging in the analysis of ameloblastoma: report of two cases

Brazilian Dental Science ◽

10.14295/bds.2019.v22i3.1763 ◽

2019 ◽

Vol 22 (3) ◽

pp. 425-431

Author(s):

Neiandro Santos Galvão ◽

Antonione Santos Bezerra Pinto ◽

Alan Leandro Carvalho Farias ◽

André Luiz Ferreira Costa ◽

Sérgio Lúcio Pereira de Castro Lopes ◽

...

Keyword(s):

Differential Diagnosis ◽

Magnetic Resonance ◽

Signal Intensity ◽

Diagnostic Value ◽

Resonance Imaging ◽

Intermediate Signal Intensity ◽

Additional Information ◽

Imaging Characteristics ◽

Ameloblastoma is an odontogenic tumor that shares clinical and imaging characteristics with other lesions of the jaws, such as odontogenic keratocyst, which makes the diagnosis difficult. However, in addition to radiographic and tomographic examinations, Magnetic Resonance Imaging (MRI) has been increasingly used, contributing with relevant additional information about the differentiation between solid and liquid components of the lesion. This case report was conducted to present two variations of ameloblastoma and discuss the radiographic, tomographic and MRI contribution in the differential diagnosis between ameloblastoma and odontogenic keratocyst.The signal intensity in T1-weighted MRI revealed internal fluid content in both cases, which was important in the differential diagnosis with other intraosseous lesions such as odontogenic keratocysts. This is probably due to the presence of keratin that increases the viscosity of the content and also for an intermediate signal intensity signal in T2-weighted MRI. Therefore, MRI revealed important internal characteristics of the reported lesions, which was very useful in the establishment of the differential diagnosis with other lesions.

Four-year outcomes from a multiparametric magnetic resonance imaging (MRI)-based active surveillance programme: PSA dynamics and serial MRI scans allow omission of protocol biopsies

BJU International ◽

10.1111/bju.14513 ◽

2018 ◽

Vol 123 (3) ◽

pp. 429-438 ◽

Cited By ~ 12

Author(s):

Kevin Michael Gallagher ◽

Edward Christopher ◽

Andrew James Cameron ◽

Scott Little ◽

Alasdair Innes ◽

...

Keyword(s):

Magnetic Resonance ◽

Active Surveillance ◽

Resonance Imaging ◽

Surveillance Programme ◽

Multiparametric Magnetic Resonance Imaging ◽

Protocol Biopsies ◽

Mri Scans ◽

Serial Mri

Safety Issues in Magnetic Resonance Imaging Scan with Retention of Olympus Long Clips in the Gastrointestinal Tract

Current Medical Imaging Formerly Current Medical Imaging Reviews ◽

10.2174/1573405617666210624125335 ◽

2021 ◽

Vol 17 ◽

Author(s):

Cheng-Yi Wang ◽

Wei-Chou Chang ◽

Hsin-Hung Huang ◽

Wei-Kuo Chang ◽

Yu-Lueng Shih ◽

...

Keyword(s):

Magnetic Resonance ◽

Magnetic Resonance Imaging Scan ◽

Resonance Imaging ◽

Endoscopic Clip ◽

Serious Adverse Event ◽

Safety Issues ◽

Endoscopic Clips ◽

Mri Scans ◽

Objective: Not all endoscopic clips are compatible with magnetic resonance imaging (MRI). The aim of this study is to investigate the safety of MRI-incompatible endoscopic clips in patients undergoing MRI scans. Methods: We retrospectively reviewed the medical records of patients who had received endoscopic clip placement of Olympus Long Clip MRI-incompatible clips and then had undergone MRI scans within two weeks in our hospital between 2014 and 2019. Results: A total of 44,292 patients had undergone an MRI examination at our hospital. Only 15 patients had MRI scans within two weeks after the endoscopic clip placement. Their median age was 65.5 years, and 12 of the 15 patients were men. At the time of the clip placement and MRI scan, four patients were taking anti-coagulation or anti-platelet agents. The indication for endoscopic clip placement of the 15 patients was mucosal/submucosal defect or hemorrhage and colonic perforation. Endoscopic clips were placed in the colon of 14 patients and in the stomach of only one patient for gastric hemorrhage. One patient experienced clip migration and three displayed artifacts in abdominal images. No patient complications of mortality, hemorrhage, or organ perforation occurred. Conclusion: No serious adverse event occurred during MRI scans of patients with MRI-incompatible clips in this study, suggesting that MRI-incompatible clips may be safe to use in MRI scans. However, this does not guarantee the safety of the Long Clip for MRI scans, as further tests are needed to verify that this clip is safe for use during MRI.

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

Hand ◽

10.1177/15589447211064363 ◽

2022 ◽

pp. 155894472110643

Author(s):

Jimmy H. Daruwalla ◽

Jan Skrok ◽

Mitchell A. Pet ◽

Aviram M. Giladi ◽

James P. Higgins

Keyword(s):

Magnetic Resonance ◽

Sagittal Plane ◽

Convex Surface ◽

Radius Of Curvature ◽

Resonance Imaging ◽

Femoral Trochlea ◽

Average Ratio ◽

Mri Scans ◽

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.