scholarly journals Prinsip, Teknik, dan Algoritma untuk Karakterisasi Pencitraan Lesi-Lesi Adrenal Incidentaloma

2017 ◽  
Vol 3 (1) ◽  
pp. 28-38
Author(s):  
Bambang Purwanto Utomo ◽  
Pramiadi Pramiadi
Keyword(s):  
Imaging Techniques ◽  
Correct Diagnosis ◽  
Critical Role ◽  
Adrenal Incidentaloma ◽  
Resonance Imaging ◽  
Imaging Algorithm ◽  
Adrenal Imaging ◽  
Magnetic Resonance Imaging Lesion ◽  
Imaging Algorithms

Adrenal Incidentaloma lesions are commonly detected by Computed Tomography and Magnetic Resonance Imaging. Lesion characterization is essential to predict the prognosis of the primary disease, to assess staging, and direct therapy. Imaging plays a critical role in the characterization of adrenal incidentaloma lesions. Imaging modalities have been developed forr accurately differentiating lesions by using anatomic and physiologic imaging principles and major adrenal imaging techniques currently available which include newly developed promising techniques. An imaging algorithm is provided to guide radiologists in recognizing, reporting, and managing adrenal lesions, so it leads to the appropriate test to make correct diagnosis. The purpose of this article is to discuss the principles, techniques and imaging algorithms in characterizing adrenal lesions.

Thumb Injuries and Instabilities. Part 2: Spectrum of Lesions

2021 ◽  
Vol 25 (02) ◽  
pp. 355-365
Author(s):  
Alain G. Blum ◽  
Marnix T. van Holsbeeck ◽  
Stefano Bianchi
Keyword(s):  
Soft Tissues ◽  
Imaging Techniques ◽  
Metacarpophalangeal Joint ◽  
Resonance Imaging ◽  
Ligament Injuries ◽  
First Line ◽  
Collateral Ligament ◽  
Traumatic Injuries ◽  
Line Imaging

AbstractThe motor function of the thumb and its alignment with regard to the hand make it particularly vulnerable to trauma. Pathology encountered in this joint is varied, and imaging techniques play a crucial role in the diagnosis and characterization of injury. Despite advances in imaging technology, acute thumb injuries remain a challenge for radiologists. Currently, standard radiography and ultrasonography are frequently used first-line imaging techniques. Computed tomography is most often indicated for complex fractures and dislocations. Magnetic resonance imaging may be used to optimally characterize soft tissues and bone marrow. In this article, we cover the most common traumatic injuries: fractures, dislocations, collateral ligament injuries of the metacarpophalangeal joint, as well as soft tissue lesions.

scholarly journals Adrenal incidentaloma. Part 1. Computed tomography of adrenal incidentaloma: the possibilities and difficulties of differential diagnosis

2020 ◽  
Vol 92 (12) ◽  
pp. 185-194
Author(s):  
S. A. Buryakina ◽  
N. V. Tarbaeva ◽  
N. N. Volevodz ◽  
G. G. Karmazanovsky ◽  
L. D. Kovalevich ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Differential Diagnosis ◽  
Adrenal Gland ◽  
Correct Diagnosis ◽  
Adrenal Incidentaloma ◽  
Diagnostic Study ◽  
Specific Organ ◽  
Adequate Management ◽  
Active Can

The adrenal incidentaloma is a lesion of a different etiology and found incidentally in patients who underwent a diagnostic study not about the disease of this organ. Lesions can be both hormonally inactive and hormonally active, can arise from different zones of the adrenal gland or have non-specific organ affiliation, can be benign or malignant. Computed tomography characterization of these lesions, especially the differential diagnosis of benign and malignant, is extremely important for the correct diagnosis in order to provide adequate management of the patient. The article presents the key computed tomography criteria that allow radiologist to characterize the lesion most accurately and consider appropriate diagnosis.

Virtopsy: Postmortem Imaging of Laryngeal Foreign Bodies

2009 ◽  
Vol 133 (5) ◽  
pp. 806-810 ◽  
Author(s):  
Lars Oesterhelweg ◽  
Stephan A. Bolliger ◽  
Michael J. Thali ◽  
Steffen Ross
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Foreign Body ◽  
Magnetic Resonance ◽  
Multislice Computed Tomography ◽  
Foreign Bodies ◽  
Imaging Techniques ◽  
Correct Diagnosis ◽  
Diagnostic Value ◽  
Resonance Imaging

Abstract Context.—Death from corpora aliena in the larynx is a well-known entity in forensic pathology. The correct diagnosis of this cause of death is difficult without an autopsy, and misdiagnoses by external examination alone are common. Objective.—To determine the postmortem usefulness of modern imaging techniques in the diagnosis of foreign bodies in the larynx, multislice computed tomography, magnetic resonance imaging, and postmortem full-body computed tomography–angiography were performed. Design.—Three decedents with a suspected foreign body in the larynx underwent the 3 different imaging techniques before medicolegal autopsy. Results.—Multislice computed tomography has a high diagnostic value in the noninvasive localization of a foreign body and abnormalities in the larynx. The differentiation between neoplasm or soft foreign bodies (eg, food) is possible, but difficult, by unenhanced multislice computed tomography. By magnetic resonance imaging, the discrimination of the soft tissue structures and soft foreign bodies is much easier. In addition to the postmortem multislice computed tomography, the combination with postmortem angiography will increase the diagnostic value. Conclusions.—Postmortem, cross-sectional imaging methods are highly valuable procedures for the noninvasive detection of corpora aliena in the larynx.

Detection and Characterization of Musculoskeletal Cancer Using Whole-Body Magnetic Resonance Imaging

2020 ◽  
Vol 24 (06) ◽  
pp. 726-750
Author(s):  
Amanda Isaac ◽  
Frederic Lecouvet ◽  
Danoob Dalili ◽  
Laura Fayad ◽  
Vasiliki Pasoglou ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Clinical Pathways ◽  
Imaging Techniques ◽  
Clinical Applications ◽  
Whole Body ◽  
Resonance Imaging ◽  
Skeletal Involvement ◽  
Body Magnetic Resonance Imaging

AbstractWhole-body magnetic resonance imaging (WB-MRI) is gradually being integrated into clinical pathways for the detection, characterization, and staging of malignant tumors including those arising in the musculoskeletal (MSK) system. Although further developments and research are needed, it is now recognized that WB-MRI enables reliable, sensitive, and specific detection and quantification of disease burden, with clinical applications for a variety of disease types and a particular application for skeletal involvement. Advances in imaging techniques now allow the reliable incorporation of WB-MRI into clinical pathways, and guidelines recommending its use are emerging. This review assesses the benefits, clinical applications, limitations, and future capabilities of WB-MRI in the context of other next-generation imaging modalities, as a qualitative and quantitative tool for the detection and characterization of skeletal and soft tissue MSK malignancies.

Quantitative nano-characterization of heterogeneous catalysts

1995 ◽  
Vol 53 ◽  
pp. 398-399
Author(s):  
P.A. Crozier ◽  
M. Pan
Keyword(s):  
Heterogeneous Catalysts ◽  
Low Dose ◽  
Imaging Techniques ◽  
Structural Features ◽  
Catalyst Characterization ◽  
New Developments ◽  
Double Phase ◽  
Phase Systems ◽  
Dose Imaging

Heterogeneous catalysts can be of varying complexity ranging from single or double phase systems to complicated mixtures of metals and oxides with additives to help promote chemical reactions, extend the life of the catalysts, prevent poisoning etc. Although catalysis occurs on the surface of most systems, detailed descriptions of the microstructure and chemistry of catalysts can be helpful for developing an understanding of the mechanism by which a catalyst facilitates a reaction. Recent years have seen continued development and improvement of various TEM, STEM and AEM techniques for yielding information on the structure and chemistry of catalysts on the nanometer scale. Here we review some quantitative approaches to catalyst characterization that have resulted from new developments in instrumentation.HREM has been used to examine structural features of catalysts often by employing profile imaging techniques to study atomic details on the surface. Digital recording techniques employing slow-scan CCD cameras have facilitated the use of low-dose imaging in zeolite structure analysis and electron crystallography. Fig. la shows a low-dose image from SSZ-33 zeolite revealing the presence of a stacking fault.

Coherent electron nanodiffraction from clean silver nano particles in a UHV STEM

1993 ◽  
Vol 51 ◽  
pp. 1058-1059
Author(s):  
J. Liu ◽  
M. Pan ◽  
G. E. Spinnler
Keyword(s):  
Supported Catalysts ◽  
Imaging Techniques ◽  
Nano Particles ◽  
Metal Particles ◽  
Shape Structure ◽  
Dynamical Simulations ◽  
Small Metal Particles ◽  
Extract Information

Small metal particles have peculiar chemical and physical properties as compared to bulk materials. They are especially important in catalysis since metal particles are common constituents of supported catalysts. The structural characterization of small particles is of primary importance for the understanding of structure-catalytic activity relationships. The shape and size of metal particles larger than approximately 5 nm in diameter can be determined by several imaging techniques. It is difficult, however, to deduce the shape of smaller metal particles. Coherent electron nanodiffraction (CEND) patterns from nano particles contain information about the particle size, shape, structure and defects etc. As part of an on-going program of STEM characterization of supported catalysts we report some preliminary results of CEND study of Ag nano particles, deposited in situ in a UHV STEM instrument, and compare the experimental results with full dynamical simulations in order to extract information about the shape of Ag nano particles.

Hilar cholangiocarcinoma

2018 ◽  
Vol 1 (3) ◽  
pp. 28-30
Author(s):  
Tanita Suttichaimongkol
Keyword(s):  
Magnetic Resonance ◽  
Hilar Cholangiocarcinoma ◽  
Critical Role ◽  
Magnetic Resonance Cholangiopancreatography ◽  
Resonance Imaging ◽  
Extrahepatic Cholangiocarcinoma ◽  
Case Presentation ◽  
Duct Epithelium ◽  
Bile Duct Epithelium ◽  
High Degree

Cholangiocarcinoma is a primary biliary tract tumor arising from the bile duct epithelium. Classically, these tumors have been categorized according to their anatomic location as intrahepatic and extrahepatic. Hilar cholangiocarcinoma is the most common type of extrahepatic cholangiocarcinoma. It is the most difficult cancer to diagnose and therefore carries a poor prognosis with a 5-year survivalrate of less than 10%. Diagnostic imaging, coupled with a high degree of clinical suspicion, play a critical role in timely diagnosis, staging, and evaluation for surgical resectability. The most common imagingmodalities used for diagnosis and staging of hilar cholangiocarcinoma include ultrasound (US), computed tomography (CT), magnetic resonance imaging/magnetic resonance cholangiopancreatography(MRI/MRCP). This article showed a case presentation and reviewed the imaging appearance of hilar cholangiocarcinoma.   Figure 1  Greyscale sonography at the level of hepatic hilum revealed an ill-defined hilar mass (asterisk)resulting in upstream dilatation of right (arrow) and left (arrow head) main intrahepatic duct.  

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