scholarly journals Isocitrate dehydrogenase mutation is associated with tumor location and magnetic resonance imaging characteristics in astrocytic neoplasms

2014 ◽  
Vol 7 (6) ◽  
pp. 1895-1902 ◽  
Author(s):  
SONGTAO QI ◽  
LEI YU ◽  
HEZHEN LI ◽  
YANGHUI OU ◽  
XIAOYU QIU ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Isocitrate Dehydrogenase ◽  
Tumor Location ◽  
Resonance Imaging ◽  
Imaging Characteristics ◽  
Isocitrate Dehydrogenase Mutation ◽  
Astrocytic Neoplasms

Imaging findings of trichilemmal cyst and proliferating trichilemmal tumour

2021 ◽  
pp. 197140092110177
Author(s):  
Masaya Kawaguchi ◽  
Hiroki Kato ◽  
Natsuko Suzui ◽  
Tatsuhiko Miyazaki ◽  
Hiroyuki Tomita ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Hounsfield Units ◽  
Soft Tissue Density ◽  
Cutaneous Lesions ◽  
Imaging Characteristics ◽  
Trichilemmal Cyst ◽  
T1 Hyperintensity

Purpose The purpose of this study was to evaluate computed tomography and magnetic resonance imaging of benign trichilemmal cysts and proliferating trichilemmal tumours. Methods Nineteen histologically confirmed cutaneous lesions with trichilemmal keratinisation (12 trichilemmal cysts and seven proliferating trichilemmal tumours) were enrolled. Among them, 10 lesions (six trichilemmal cysts and four proliferating trichilemmal tumours) were examined by computed tomography, while 13 lesions (eight trichilemmal cysts and five proliferating trichilemmal tumours) were examined by magnetic resonance imaging. Computed tomography and magnetic resonance imaging characteristics were retrospectively reviewed. RESULTS Sixteen lesions (84%, 10 trichilemmal cysts and six proliferating trichilemmal tumours) occurred on the scalp. Lobulated margins were observed in five lesions (26%, three trichilemmal cysts and two proliferating trichilemmal tumours). With respect to computed tomography attenuation, calcification (>200 Hounsfield units) was observed in seven lesions (70%, five trichilemmal cysts and two proliferating trichilemmal tumours), hyperdense areas (≥80 and ≤200 Hounsfield units) in six (60%, three trichilemmal cysts and three proliferating trichilemmal tumours), and soft tissue density areas (<80 Hounsfield units) in nine (90%, five trichilemmal cysts and four proliferating trichilemmal tumours). On T1-weighted images, intratumoral hyperintensity was only observed in eight trichilemmal cysts but no proliferating trichilemmal tumours (100% vs. 0%, P<0.01). On T2-weighted images, hypointense rim and intratumoral hypointensity was observed in all 13 lesions (100%, eight trichilemmal cysts and five proliferating trichilemmal tumours), and linear or reticular hypointensity was observed in 10 (77%, six trichilemmal cysts and four proliferating trichilemmal tumours). Conclusion Trichilemmal cysts and proliferating trichilemmal tumours predominantly occurred on the scalp with calcification, and usually exhibited linear or reticular T2 hypointensity. Intratumoral T1 hyperintensity may be a useful imaging feature for differentiating trichilemmal cysts from proliferating trichilemmal tumours.

scholarly journals Parallel Imaging Artifacts in Body Magnetic Resonance Imaging

2009 ◽  
Vol 60 (2) ◽  
pp. 91-98 ◽  
Author(s):  
Patricia Noël ◽  
Roland Bammer ◽  
Caroline Reinhold ◽  
Masoom A. Haider
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Parallel Imaging ◽  
Negative Impact ◽  
Significant Advance ◽  
Resonance Imaging ◽  
Imaging Characteristics ◽  
Coil Geometry ◽  
Body Magnetic Resonance Imaging ◽  
Time Required

Objective To familiarize the reader with the fundamental concepts of partial parallel imaging (PPI); to review the technical aspects of PPI including calibration scan, coil geometry, and field of view (FOV); and to illustrate artifacts related to parallel imaging and describe solutions to minimize their negative impact. Results PPI has led to a significant advance in body magnetic resonance imaging by reducing the time required to generate an image without loss of spatial resolution. Although PPI can improve image quality, it is not free of artifacts, which can result in significant image degradation. Knowledge of these artifacts and how to minimize their effect is important to optimize the use of parallel imaging for specific body magnetic resonance imaging applications. Conclusions The reader will be introduced to the fundamental principles of PPI. Common imaging characteristics of PPI artifacts will be displayed with an emphasis on those seen with image-based methods, the principles behind their generation presented, and measures to minimize their negative impact will be proposed.

Granular cell tumor of the extremity: magnetic resonance imaging characteristics with pathologic correlation

2005 ◽  
Vol 34 (10) ◽  
pp. 625-631 ◽  
Author(s):  
Marcia F. Blacksin ◽  
Lawrence M. White ◽  
Meera Hameed ◽  
Rita Kandel ◽  
Francis R. Patterson ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Granular Cell Tumor ◽  
Granular Cell ◽  
Cell Tumor ◽  
Resonance Imaging ◽  
Pathologic Correlation ◽  
Imaging Characteristics

scholarly journals Magnetic resonance imaging characteristics of children and adults with paediatric-onset multiple sclerosis

Brain ◽  
2009 ◽  
Vol 132 (12) ◽  
pp. 3392-3400 ◽  
Author(s):  
E. A. Yeh ◽  
B. Weinstock-Guttman ◽  
M. Ramanathan ◽  
D. P. Ramasamy ◽  
L. Willis ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Multiple Sclerosis ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Imaging Characteristics

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

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):  
Magnetic Resonance Imaging ◽  
Differential Diagnosis ◽  
Magnetic Resonance ◽  
Signal Intensity ◽  
Diagnostic Value ◽  
Resonance Imaging ◽  
Intermediate Signal Intensity ◽  
Additional Information ◽  
Imaging Characteristics ◽  
Magnetic Resonance Imaging Mri

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.

Magnetic resonance imaging characteristics of pilomyxoid astrocytoma

2008 ◽  
Vol 30 (9) ◽  
pp. 945-951 ◽  
Author(s):  
Ricardo J. Komotar ◽  
Brad E. Zacharia ◽  
Michael E. Sughrue ◽  
J. Mocco ◽  
Benjamin S. Carson ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Pilomyxoid Astrocytoma ◽  
Imaging Characteristics
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