Inflammatory pseudotumor of the liver: Appearance on contrast enhanced helical CT and dynamic Mr images

1995 ◽  
Vol 5 (5) ◽  
pp. 551-553 ◽  
Keyword(s):  
Inflammatory Pseudotumor ◽  
Helical Ct ◽  
Mr Images ◽  
Contrast Enhanced ◽  
Dynamic Mr

scholarly journals Analysis of contrast-enhanced dynamic MR images of the lung

2001 ◽  
Vol 13 (4) ◽  
pp. 577-587 ◽  
Author(s):  
Geir Torheim ◽  
Tore Amundsen ◽  
Peter A. Rinck ◽  
Olav Haraldseth ◽  
Giovanni Sebastiani
Keyword(s):  
Mr Images ◽  
Contrast Enhanced ◽  
Dynamic Mr

Slowly Enhancing Lesions after Gamma Knife Radiosurgery for Cerebral Arteriovenous Malformations

2002 ◽  
Vol 15 (6) ◽  
pp. 737-743
Author(s):  
H. Mori ◽  
S. Aoki ◽  
M. Shin ◽  
M. Tago ◽  
T. Masumoto ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Gamma Knife ◽  
Arteriovenous Malformations ◽  
Gamma Knife Radiosurgery ◽  
Mr Images ◽  
Cerebral Arteriovenous Malformations ◽  
Imaging Appearance ◽  
Dynamic Mr Imaging ◽  
Contrast Enhanced ◽  
Dynamic Mr

We present the contrast-enhanced dynamic MR imaging appearance of cerebral arteriovenous malformations (AVM) following gamma knife radiosurgery and discuss the implications of this finding with respect to treatment. Dynamic MR images obtained in our three AVM patients following radiosurgery revealed slowly enhancing lesions. This pattern is not observed in all cases involving AVMs following gamma knife radiosurgery. When it is present, a haemangioma-like lesion should be considered.

Sensitivity in detection of hypervascular hepatocellular carcinoma by helical ct with intra-arterial injection of contrast medium, and by helical CT and MR imaging with intravenous injection of contrast medium

1998 ◽  
Vol 39 (2) ◽  
pp. 144-151 ◽  
Author(s):  
M. Hori ◽  
T. Murakami ◽  
H. Oi ◽  
T. Kim ◽  
S. Takahashi ◽  
...  
Keyword(s):  
Hepatocellular Carcinoma ◽  
Mr Imaging ◽  
Contrast Medium ◽  
Spin Echo ◽  
Equilibrium Phase ◽  
Helical Ct ◽  
Arterial Phase ◽  
Contrast Enhanced ◽  
Significant Difference ◽  
Dynamic Mr

Purpose: to determine the effectiveness of i.a. contrast-enhanced helical CT and of i.v. contrast-enhanced helical CT and MR imaging, in detecting hyper-vascular hepatocellular carcinoma (HCC) Material and Methods: Fifty patients with 125 hypervascular HCC nodules underwent helical CT both during arterial portography (CTAP) and during hepatic arteriography (CTHA). Helical CT and MR imaging of the entire liver with i.v. administration of contrast medium were also performed. Helical CT images were obtained at 30–33 s (arterial-phase CT) and at 5 min (equilibrium-phase CT) after the initiation of an i.v. bolus injection of contrast medium. After T1- and T2-weighted spin-echo MR imaging, gradient-echo images during breath-holding were obtained prior to and 20 s, 1 min, and 2 min after the bolus administration of 0.1 mmol/kg of gadopentetate dimeglumine (dynamic MR). the sensitivity and positive predictive value of the various techniques were evaluated and compared Results: in terms of sensitivity for hypervascular HCC nodules of less than 1 cm in diameter, CTAP (90%) and CTHA (88%) were significantly superior to dynamic MR imaging (44%), arterial-phase CT (39%), spin-echo MR imaging (20%), and equilibrium-phase CT (7%) ( p>0.001). However, there was no significant difference in the techniques with regard to the detection of lesions equal to or more than 2 cm in diameter Conclusion: for detecting small hypervascular HCCs, helical CT with i.a. contrast enhancement is superior to helical CT and MR imaging with i.v. enhancement

scholarly journals Apparent Diffusion Coefficient in Invasive Ductal Breast Carcinoma: Correlation with Detailed Histologic Features and the Enhancement Ratio on Dynamic Contrast-Enhanced MR Images

2010 ◽  
Vol 2010 ◽  
pp. 1-6 ◽  
Author(s):  
Roka Namoto Matsubayashi ◽  
Teruhiko Fujii ◽  
Kotaro Yasumori ◽  
Toru Muranaka ◽  
Seiya Momosaki
Keyword(s):  
Diffusion Coefficient ◽  
Growth Patterns ◽  
Breast Carcinomas ◽  
Mr Images ◽  
Cellular Density ◽  
Dynamic Contrast Enhanced ◽  
Diffusion Weighted Images ◽  
Architectural Features ◽  
Contrast Enhanced ◽  
Adc Values

Purpose. To investigate the correlation of Apperent Diffusion Coefficient (ADC) values in invasive ductal breast carcinomas with detailed histologic features and enhancement ratios on dynamic contrast-enhanced MRI.Methods and Materials. Dynamic MR images and diffusion-weighted images (DWIs) of invasive ductal breast carcinomas were reviewed in 25 (26 lesions) women. In each patient, DWI, T2WI, T1WI, and dynamic images were obtained. The ADC values of the 26 carcinomas were calculated with b-factors of 0 and 1000 s/ using echoplanar DWI. Correlations of the ADC values were examined on dynamic MRI with enhancement ratios (early to delayed phase: E/D ratio) and detailed histologic findings for each lesion, including cellular density, the size of cancer nests, and architectural features of the stroma (broad, narrow, and delicate) between cancer nests.Results. The mean ADC was  /sec. Cellular density was significantly correlated with ADC values () and E/D ratios (). The ADC values were also significantly correlated to features of the stroma (broad to narrow, ).Conclusion. The findings suggest that DWIs reflect the growth patterns of carcinomas, including cellular density and architectural features of the stroma, and E/D ratios may also be closely correlated to cellular density.

Inflammatory pseudotumor of the spleen: report of a case with emphasis on contrast-enhanced ultrasound findings

2006 ◽  
Vol 33 (3) ◽  
pp. 177-180
Author(s):  
Hitoshi Yagisawa ◽  
Hideaki Ishida ◽  
Tomoya Komatsuda ◽  
Kayoko Furukawa ◽  
Mamiko Yamada ◽  
...  
Keyword(s):  
Inflammatory Pseudotumor ◽  
Contrast Enhanced Ultrasound ◽  
Contrast Enhanced ◽  
Ultrasound Findings

Differential diagnosis of focal liver lesions: role of spin-echo and contrast-enhanced dynamic MR imaging.

Radiology ◽  
1994 ◽  
Vol 193 (1) ◽  
pp. 59-65 ◽  
Author(s):  
Y Yamashita ◽  
Y Hatanaka ◽  
H Yamamoto ◽  
A Arakawa ◽  
T Matsukawa ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Mr Imaging ◽  
Spin Echo ◽  
Focal Liver Lesions ◽  
Liver Lesions ◽  
Dynamic Mr Imaging ◽  
Contrast Enhanced ◽  
Dynamic Mr

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.

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