Multimodality Approach to Detection and Characterization of Hepatic Hemangiomas

2013 ◽  
pp. 123-144
Author(s):  
Rajan T. Gupta ◽  
Daniele Marin
Keyword(s):  
Multimodality Approach ◽  
Hepatic Hemangiomas

scholarly journals Multimodality Approach in Detection and Characterization of Hepatic Metastases

2020 ◽  
Vol 03 (02) ◽  
pp. 163-180
Author(s):  
Pooja G. Patil ◽  
Pramesh Reddy ◽  
Sudarshan Rawat ◽  
Rupa Ananthasivan ◽  
Rakesh Sinha
Keyword(s):  
Computed Tomography ◽  
Hepatic Metastases ◽  
Resonance Imaging ◽  
Metastatic Lesions ◽  
Positron Emission ◽  
Computed Tomography Scans ◽  
Tissue Sensitivity ◽  
Magnetic Resonance Imaging Mri ◽  
Multimodality Approach

AbstractEarly detection of liver metastases is important in patients with known primary malignancies. This plays an important role in treatment planning and impacts on further management of certain primary malignancies.Magnetic resonance imaging (MRI), computed tomography (CT), and positron emission tomography-computed tomography scans are reported to have high accuracy in the diagnosis of intrahepatic lesions. MRI in particular has the advantages of its high tissue sensitivity and its multiparametric approach.Hepatic metastatic lesions have considerable overlap in their radiological appearance, and in this article the imaging appearance of various hepatic metastasis and approach is described.

Optimal MR Protocol for Hepatic Hemangiomas

1997 ◽  
Vol 38 (4) ◽  
pp. 565-571 ◽  
Author(s):  
T. K. Kim ◽  
B. I. Choi ◽  
J. K. Han ◽  
H.-J. Jang ◽  
M. C. Han
Keyword(s):  
Clinical Study ◽  
Spin Echo ◽  
Gadopentetate Dimeglumine ◽  
Breath Hold ◽  
Enhancement Pattern ◽  
Conventional Spin Echo ◽  
Dynamic Mr ◽  
Lesion Conspicuity ◽  
Hepatic Hemangiomas

Purpose: To compare conventional spin-echo (SE) sequences with T2-weighted turbo SE and serial gadolinium-enhanced T1-weighted FLASH sequences in the detection and characterization of hepatic hemangiomas, and to describe the enhancement characteristics of the lesions on dynamic MR imaging. Material and Methods: Forty-two patients with 66 hemangiomas were studied at 1.0 T or 1.5 T by using conventional SE sequences (T1-weighted, T2-weighted, and heavily T2-weighted), T2-weighted turbo SE sequences, and breath-hold T1-weighted FLASH sequences acquired before, immediately after, and 1, 2, 3, 5, and 10 min after injection of a bolus of gadopentetate dimeglumine. Images were quantitatively analyzed for lesion-to-liver contrast-to-noise (C/N) ratios, and qualitatively analyzed for lesion conspicuity. The enhancement pattern and the rapidity of enhancement were analyzed in small (<15 mm), medium (15-39 mm), and large (>39 mm) hemangiomas. Results: In T2-weighted images, T2-weighted turbo SE and heavily T2-weighted SE images had higher C/N ratios than T2-weighted SE images (p=0.003). Lesion conspicuity was not significantly different in these 3 sequences (p=0.307). In T1-weighted images, T1-weighted FLASH images had higher C/N (p<0.001) and also better lesion conspicuity (p<0.001) than T1-weighted SE images. Immediate uniform enhancement was seen in 43% of small hemangiomas (9 of 21 lesions), and persistent central hypo-intensity was seen in 73% of large hemangiomas (11 of 15 lesions). Rapid enhancement was seen in 62% of small hemangiomas (13 of 21 lesions) and in 31% of medium or large hemangiomas (14 of 45 lesions). Conclusion: Further clinical study is needed for evaluating the differential diagnostic advantages of turbo SE T2-weighted imaging compared to the calculation of T2-values by means of a SE T2-weighted sequence. However, the results of the present study suggest that T2-weighted turbo SE imaging and precontrast and serial gadolinium-enhanced FLASH imaging have the potential to replace conventional SE imaging in the evaluation of hepatic hemangiomas.

Sonographic characterization of 271 hepatic hemangiomas with typical appearance on CT imaging

2012 ◽  
Vol 39 (2) ◽  
pp. 61-68 ◽  
Author(s):  
Hiroaki Ito ◽  
Fumio Tsujimoto ◽  
Yasuo Nakajima ◽  
Gaku Igarashi ◽  
Takanori Okamura ◽  
...  
Keyword(s):  
Ct Imaging ◽  
Typical Appearance ◽  
Hepatic Hemangiomas

Pleural mesothelioma

2016 ◽  
pp. 659-673
Author(s):  
Andrea S. Wolf ◽  
Assunta de Rienzo ◽  
Raphael Bueno ◽  
Lucian R. Chirieac ◽  
Joseph M. Corson ◽  
...  
Keyword(s):  
Diagnostic Procedures ◽  
Extrapleural Pneumonectomy ◽  
Pleural Mesothelioma ◽  
Developing Regions ◽  
Trimodal Therapy ◽  
Occupational And Environmental Exposure ◽  
Novel Approaches ◽  
Multimodality Approach ◽  
Global Health Problem

Occupational and environmental exposure to asbestos is a global health problem; mesothelioma can be traced to the mining and manufacture of asbestos. Moreover, asbestos use continues unabated in many developing regions of the world ensuring that this epidemic will certainly continue for decades beyond current projections. The current multimodality approach to malignant pleural mesothelioma (MPM) is defined as a macroscopic complete resection (MCR) such as extrapleural pneumonectomy (EPP) or pleurectomy/decortication (P/D), followed or preceded by some form of therapy for micrometastatic control. The latter usually consists of adjuvant or neoadjuvant chemotherapy and radiation (trimodal therapy), but novel approaches are also being investigated, such as heated intracavitary chemotherapy, photodynamic therapy, and novel radiation techniques. Concurrent developments in diagnostic procedures, histopathologic characterization of mesothelial cells, and staging have improved patient selection, but more research is needed to extend survival by limiting the micrometastatic spread of tumours.

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

AEM analysis of crystallization in Ti-based amorphous alloys

1983 ◽  
Vol 41 ◽  
pp. 270-271
Author(s):  
A.R. Pelton ◽  
A.F. Marshall ◽  
Y.S. Lee
Keyword(s):  
Magnetic Properties ◽  
Amorphous Alloys ◽  
Amorphous Materials ◽  
Isothermal Annealing ◽  
Amorphous Matrix ◽  
Nucleation And Growth ◽  
Current Interest ◽  
Amorphous Films ◽  
Electrical And Magnetic Properties

Amorphous materials are of current interest due to their desirable mechanical, electrical and magnetic properties. Furthermore, crystallizing amorphous alloys provides an avenue for discerning sequential and competitive phases thus allowing access to otherwise inaccessible crystalline structures. Previous studies have shown the benefits of using AEM to determine crystal structures and compositions of partially crystallized alloys. The present paper will discuss the AEM characterization of crystallized Cu-Ti and Ni-Ti amorphous films.Cu60Ti40: The amorphous alloy Cu60Ti40, when continuously heated, forms a simple intermediate, macrocrystalline phase which then transforms to the ordered, equilibrium Cu3Ti2 phase. However, contrary to what one would expect from kinetic considerations, isothermal annealing below the isochronal crystallization temperature results in direct nucleation and growth of Cu3Ti2 from the amorphous matrix.

Characterization of Coherent, Ordered Precipitates in Nickel-Base Alloys

1973 ◽  
Vol 31 ◽  
pp. 144-145
Author(s):  
B. H. Kear ◽  
J. M. Oblak
Keyword(s):  
Stable Phase ◽  
Nickel Base Superalloy ◽  
Alloy 718 ◽  
Commercial Alloy ◽  
Precipitate Morphology ◽  
Continuous Precipitation ◽  
Nickel Base ◽  
Base Superalloy ◽  
Strengthening Precipitate

A nickel-base superalloy is essentially a Ni/Cr solid solution hardened by additions of Al (Ti, Nb, etc.) to precipitate a coherent, ordered phase. In most commercial alloy systems, e.g. B-1900, IN-100 and Mar-M200, the stable precipitate is Ni3 (Al,Ti) γ′, with an LI2structure. In A lloy 901 the normal precipitate is metastable Nis Ti3 γ′ ; the stable phase is a hexagonal Do2 4 structure. In Alloy 718 the strengthening precipitate is metastable γ″, which has a body-centered tetragonal D022 structure.Precipitate MorphologyIn most systems the ordered γ′ phase forms by a continuous precipitation re-action, which gives rise to a uniform intragranular dispersion of precipitate particles. For zero γ/γ′ misfit, the γ′ precipitates assume a spheroidal.

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