Accurate estimation of pharmacokinetic contrast-enhanced dynamic MRI parameters of the prostate

2001 ◽  
Vol 13 (4) ◽  
pp. 607-614 ◽  
Author(s):  
Henkjan J. Huisman ◽  
Marc R. Engelbrecht ◽  
Jelle O. Barentsz
Keyword(s):  
Dynamic Mri ◽  
Accurate Estimation ◽  
Contrast Enhanced

scholarly journals A Case of Schwannoma of the Submandibular Region

2018 ◽  
Vol 12 (1) ◽  
pp. 12-18 ◽  
Author(s):  
Babatunde O. Bamgbose ◽  
Akiko Sato ◽  
Yoshinobu Yanagi ◽  
Miki Hisatomi ◽  
Yohei Takeshita ◽  
...  
Keyword(s):  
Diagnostic Imaging ◽  
Hypoglossal Nerve ◽  
Salivary Gland Tumor ◽  
Dynamic Mri ◽  
Final Diagnosis ◽  
Mr Images ◽  
Submandibular Region ◽  
Contrast Enhanced ◽  
Mobile Mass ◽  
Ct And Mri

Background:We herein described a rare case of schwannoma of the hypoglossal nerve in the submandibular region with diagnostic imaging and histopathological findings.Case Report:A 31-years-old woman has had a palpable firm, rubbery, freely mobile mass in the submandibular region. Of imaging, MR images showed homogeneous isointensity on T1-weighted imaging (T1-WI), heterogeneous hypointensity on T2-WI, heterogeneous hyperintensity on short T1 inversion recovery (STIR), and heterogeneous enhancement on contrast-enhanced T1-WI. A clear capsule was observed on the margin and showed hypointense on T2-WI. Dynamic MRI showed heterogeneous gradual increased enhancement. The uptake of contrast medium was regionally slow. Diagnostic imaging using CT and MRI was suspected of salivary gland tumor or neurogenic tumor. In consideration of imaging diagnosis, a pleomorphic adenoma or a schwannoma was suspected. Final diagnosis was confirmed on the basis of histopathological finding and intraoperative findings.Conclusion:1. Histopathologic examination is inevitable, because MR findings are not specific.2. Schwannomas were said to have specific MRI properties, including specific signs (split-fat sign, fascicular sign, target sign). However, they are not always observed.3. This case confirmed the differential diagnosis on the basis of the intraoperative finding that the tumor was continuous with the hypoglossal nerve.

scholarly journals Comparison of contrast-enhanced videofluoroscopy to unenhanced dynamic MRI in minor patients following surgical correction of velopharyngeal dysfunction

2020 ◽  
Vol 31 (1) ◽  
pp. 76-84 ◽  
Author(s):  
C. T. Arendt ◽  
K. Eichler ◽  
M. G. Mack ◽  
D. Leithner ◽  
S. Zhang ◽  
...  
Keyword(s):  
Dynamic Mri ◽  
Surgical Correction ◽  
Contrast Enhanced

DYNAMIC MRI FOR TUMOR ENHANCEMENT: AN EXPERIMENTAL BREAST CANCER MODEL

2013 ◽  
Vol 25 (01) ◽  
pp. 1350011 ◽  
Author(s):  
Ting-Kai Leung ◽  
Pai-Jung Huang ◽  
Chi-Ming Lee ◽  
Chih-Hsiung Wu ◽  
Yi-Fan Chen ◽  
...  
Keyword(s):  
False Positive Rate ◽  
Maximum Intensity Projection ◽  
Breast Mri ◽  
Dynamic Mri ◽  
Future Research ◽  
Post Processing ◽  
Contrast Enhanced ◽  
Novel Drugs ◽  
Positive Rate ◽  
Magnetic Resonance Imaging Mri

Dynamic contrast-enhanced magnetic resonance imaging (MRI) with post-processing is routinely used for the analysis of tumors. However, although breast MRI has gained broad clinical recognition, the relationship between imaging findings and tumor pathogenesis has yet to be fully elucidated. We grafted tumors on rats, to examine dynamic MRI images of the tumors, using post-processing subtraction with 3D maximum intensity projection (sMIP). We established a preliminary platform for analysis to compare hemodynamic-based images with histopathological findings and to further biomolecular research. This platform could facilitate future research on the mechanisms of breast tumor enhancement using MRI, improvements to MRI analysis and reduction of the false positive rate, and the development of novel drugs and contrast media.

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