scholarly journals Pretransplant diagnosis of hepatocellular carcinoma by gadoxetic acid-enhanced and diffusion-weighted magnetic resonance imaging

2014 ◽  
pp. n/a-n/a ◽  
Author(s):  
Jiyoung Hwang ◽  
Young Kon Kim ◽  
Jong Man Kim ◽  
Won Jae Lee ◽  
Dongil Choi ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Hepatocellular Carcinoma ◽  
Magnetic Resonance ◽  
Gadoxetic Acid ◽  
Resonance Imaging ◽  
Diffusion Weighted ◽  
Weighted Magnetic Resonance Imaging ◽  
And Diffusion

Hepatocellular carcinoma with central scar on gadoxetic acid-enhanced and diffusion-weighted magnetic resonance imaging

2017 ◽  
Vol 59 (4) ◽  
pp. 393-401
Author(s):  
Sol Bee Han ◽  
Young Kon Kim ◽  
Ji Hye Min ◽  
Sang Yun Ha ◽  
Woo Kyung Jeong ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Hepatocellular Carcinoma ◽  
Magnetic Resonance ◽  
Gadoxetic Acid ◽  
Arterial Phase ◽  
Resonance Imaging ◽  
Central Scar ◽  
Tumor Capsule ◽  
Diffusion Weighted ◽  
And Diffusion

Background Central scars are rarely reported in conventional hepatocellular carcinoma (HCC). The presence of central scars on imaging might lead to erroneous diagnosis of hepatic tumors. Purpose To determine imaging features of HCC with central scars on magnetic resonance imaging (MRI) including gadoxetic acid-enhanced and diffusion-weighted imaging (DWI). Material and Methods Fifty-one patients with 51 surgically confirmed HCCs with central scars (fibrotic scar: n = 50; myxoid scar: n = 1; range = 1.2–15 cm; mean = 3.7 cm) underwent liver MRI that consisted of T1- and T2-weighted (T2W) imaging, gadoxetic acid-enhanced arterial, portal, 3-min late phase, and 20-min hepatobiliary phase (HBP), and DWI. Two reviewers evaluated morphology, signal intensity, and enhancement features of tumors and central scars for each image and reached consensus. Results Lobulated contour was seen for 30 tumors (58.8%); the rest were round or oval masses. Central scars (range = 0.2–6.0 cm; mean = 0.9 cm) were most commonly seen as defects within hyperenhancement on arterial phase images (n = 47, 92.2%), bright (n = 28, 54.9%) or dark areas (n = 15, 29.4%) on T2W imaging, areas of central darkness on high b-value DWI (b = 800) (n = 31, 60.8%), and/or central enhancement on HBP (n = 36, 70.6%), mimicking a target appearance. Tumor capsule was seen in 35 (39 pathology, 74.5%) and intratumoral septum in 35 (41 pathology, 78.4%) tumors on gadoxetic acid-enhanced MRI. Conclusion Non-fibrolamellar HCC may show central scar. HCC with central scar mimics cholangiocarcinoma by showing a target appearance on HBP and DWI. Tumor capsule and intratumoral septum might be useful for characterizing HCC with central scar.

scholarly journals Diagnosis of Acute Ischemic Stroke Based on Time-To-Peak and Diffusion-Weighted Magnetic Resonance Imaging.

2002 ◽  
Vol 42 (7) ◽  
pp. 281-288
Author(s):  
Keisuke MARUYAMA ◽  
Tsuneyoshi EGUCHI ◽  
Shigeo SORA ◽  
Masafumi IZUMI ◽  
Hirofumi HIYAMA ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Ischemic Stroke ◽  
Magnetic Resonance ◽  
Acute Ischemic Stroke ◽  
Resonance Imaging ◽  
Time To Peak ◽  
Diffusion Weighted ◽  
Weighted Magnetic Resonance Imaging ◽  
And Diffusion

scholarly journals T2- and diffusion-weighted magnetic resonance imaging of a focal ischemic lesion in rat brain.

Stroke ◽  
1992 ◽  
Vol 23 (4) ◽  
pp. 576-582 ◽  
Author(s):  
N van Bruggen ◽  
B M Cullen ◽  
M D King ◽  
M Doran ◽  
S R Williams ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Rat Brain ◽  
Resonance Imaging ◽  
Ischemic Lesion ◽  
Diffusion Weighted ◽  
Weighted Magnetic Resonance Imaging ◽  
And Diffusion
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