By Shahid M. Hussain, Michael F. Sorrell
ISBN-10: 3540255524
ISBN-13: 9783540255529
This publication presents a realistic method for MR imaging of the focal and diffuse liver lesions in keeping with cutting-edge MR imaging sequences, computer-generated drawings, concise determine captions, correct and systematic (differential) diagnostic details, fresh literature references, and sufferer administration probabilities. MR imaging findings are correlated to ultrasound, computed tomography, and pathology while appropriate.This publication will significantly profit all execs and excited about imaging, analysis, and remedy of focal and diffuse liver lesions, together with radiologists, gastroenterologists, surgeons, pathologists, MR physicists, MRI scientific scientists, radiology and different citizens, MR technicians, and scholars.
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Sample text
D Photomicrograph shows the gland that is in part filled with mucin (*). H&E, × 200 46 Part IIA – Metastases: Colorectal 22 Colorectal Metastases VI – with Portal Vein and Bile Duct Encasement Unresectable colorectal liver metastases carry a dismal prognosis. In fact, only 10 – 25 % of colorectal liver metastases are candidates for surgical resection, and the 5-year survival rate following resection of isolated colorectal liver metastases can be as high as 38 %. Without any treatment, the survival rate is less than 1 %.
Flash-filling hemangiomas show low signal intensity on T1-weighted sequences and high signal intensity on T2-weighted sequences with well-defined margins; the lesions retain their high signal on T2-weighted sequences with longer TE (Figs. 2). Ultrasound and especially (multiphasic) CT are often inconclusive (Fig. 3). Differential Diagnosis Hypervascular metastases form the most important differential diagnostic problem in the clinical setting. The T2 characteristics in combination with the delayed phase images facilitate the differentiation from hypervascular metastases, which lose their signal on T2-weighted sequences with longer TE and almost invariably show washout of contrast on delayed phase images.
D Axial delayed phase image (DEL): Metastasis shows washout with enhancement of a discontinuous pseudocapsule (arrows). E Axial SSTSE image (SSTSE): Metastasis shows a partial pseudocapsule with high signal (arrows), which is most likely caused by vessels and compressed liver parenchyma. F Axial opposed-phase image (T1 opposed-phase) shows no fatty infiltration. G Coronal SSTSE image (SSTSE) shows the metastasis bulging into the right hemidiaphragm. H Coronal delayed phase image (DEL) shows heterogeneously enhanced metastasis with encased intrahepatic bile ducts (arrow) Fig.
Liver MRI Correlation with other Imaging Modalities and Histopathology by Shahid M. Hussain, Michael F. Sorrell
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