Superficial Tissue Microsonography

1996 ◽  
pp. 501-505 ◽  
Author(s):  
Andrzej Nowicki ◽  
Jerzy Litniewski ◽  
Jacek Liwski ◽  
Wojciech Secomski ◽  
Paweł Karłowicz ◽  
...  
Keyword(s):  
Superficial Tissue

scholarly journals Ultrasound and Doppler US in Evaluation of Superficial Soft-tissue Lesions

2014 ◽  
Vol 4 ◽  
pp. 12 ◽  
Author(s):  
Huseyin Toprak ◽  
Erkan Kiliç ◽  
Asli Serter ◽  
Ercan Kocakoç ◽  
Salih Ozgocmen
Keyword(s):  
Soft Tissue ◽  
Imaging Modality ◽  
Power Doppler ◽  
Soft Tissue Lesions ◽  
Doppler Us ◽  
Size Number ◽  
Ultrasound Technology ◽  
Superficial Tissue ◽  
Superficial Soft Tissue

Improved developments in digital ultrasound technology and the use of high-frequency broadband transducers make ultrasound (US) imaging the first screening tool in investigating superficial tissue lesions. US is a safe (no ionizing radiation), portable, easily repeatable, and cheap form of imaging compared to other imaging modalities. US is an excellent imaging modality to determine the nature of a mass lesion (cystic or solid) and its anatomic relation to adjoining structures. Masses can be characterized in terms of their size, number, component, and vascularity with US and Doppler US especially with power Doppler US. US, however, is operator dependent and has a number of artifacts that can result in misinterpretation. In this review, we emphasize the role of ultrasound, particularly power Doppler, in superficial soft-tissue lesions.

scholarly journals Use of the Microdebrider in the Surgical Management of Rhinophyma

2018 ◽  
Vol 97 (1-2) ◽  
pp. E42-E45
Author(s):  
Winsion Chow ◽  
Goran Jeremic ◽  
Leigh Sowerby
Keyword(s):  
Ease Of Use ◽  
Sebaceous Glands ◽  
Connective Tissues ◽  
Revolution Speed ◽  
Surgical Tool ◽  
Acne Rosacea ◽  
End Stage ◽  
High Degree ◽  
Superficial Tissue ◽  
Surgical Option

Rhinophyma is a disfiguring end-stage manifestation of acne rosacea. It is characterized by a painless hyperplasia of the sebaceous glands and connective tissues of the nose. Numerous surgical modalities—including scalpel surgery, dermabrasion, CO2 laser ablation, and electrocautery—have been reported with varying results. We describe our experience with using a microdebrider to treat 2 patients—a 65-year-old man and a 74-year-old man—who presented with rhinophyma. The instrument we used was the Medtronic Straight-shot M4 Microdebrider. Using a low revolution speed, we easily excised the bulky superficial tissue. At higher revolution speeds with the use of a small shaver tip, we were able to achieve delicate contouring of the nasal tip and ala without causing scarring. Postoperatively, both patients exhibited an excellent cosmetic outcome and expressed a high degree of patient satisfaction. We conclude that the microdebrider is an excellent surgical tool for treating rhinophyma lesions. Its ease of use and its availability at most surgical centers makes it a favorable surgical option.

Quantification of Nanostructure Distribution in Tissue Using MicroCT Imaging

2011 ◽  
Author(s):  
Anilchandra Attaluri ◽  
Navid Manuchehrabadi ◽  
Anna Dechaumphai ◽  
Ronghui Ma ◽  
Liang Zhu
Keyword(s):  
Laser Energy ◽  
Three Dimensional ◽  
Laser Wavelength ◽  
Treatment Protocols ◽  
Geometric Ratio ◽  
Surrounding Healthy Tissue ◽  
Microct Imaging ◽  
Penetration Depths ◽  
Superficial Tissue ◽  
Tumor Area

Recently, two nanotechnologies have emerged as promising hyperthermia therapies due to their ability to confine adequate thermal energy in tumors. Both overcome the limitations of traditional hyperthermia approaches such as microwave and ultrasound, which have short penetration depths into tissue and often cause collateral thermal damage to the superficial tissue layers. One uses magnetic nanoparticles to generate heat when the nanoparticles are subject to an alternating magnetic field [1–2]. The other one uses gold nanoshells or nanorods in laser induced photothermal therapy [3–4]. By varying the geometric ratio, the nanostructures can be tuned to have strong absorption and scattering to a specific laser wavelength. The enhancement in laser energy absorption would confine the laser energy in a tumor area congregating by the nanostructure. The efficacy of these two methods relies on the achieved tumor temperature elevations which are largely determined by the nanostructure concentration distribution in the tumor. Therefore, having an imaging technique to directly visualize and analyze the three-dimensional nanostructure distribution in tumors would greatly improve treatment protocols to kill all tumor cells while avoiding overheating in the surrounding healthy tissue.

Experimental studies on a mutant gene (p) causing premature death of Ambystoma mexicanum embryos

Development ◽  
1977 ◽  
Vol 39 (1) ◽  
pp. 139-149
Author(s):  
Thomas M. Trottier ◽  
John B. Armstrong
Keyword(s):  
Muscle Development ◽  
Experimental Studies ◽  
Circulatory System ◽  
Premature Death ◽  
Mutant Gene ◽  
Ambystoma Mexicanum ◽  
Recessive Lethal ◽  
Homozygous Condition ◽  
General Defect ◽  
Superficial Tissue

The premature death (p) mutation is a recessive lethal, which, in the homozygous condition, gives rise to a complex of abnormalities. The mutant embryos develop only to stage 37, at which time disintegration of superficial tissue begins. Many of the abnormalities observed in sections of the stage-37 mutant embryo are related to its failure to establish a functioning circulatory system, or to the resulting edema and/or ascites that distend the abdomen and flanks. There are, however, abnormalities of heart, liver, gill and muscle development which cannot be attributed to lack of circulation and edema. All of these abnormalities can be indirectly related to the endoderm, particularly the anterior and dorsal endoderm. The findings, therefore, suggest that the mutation leads to a fairly general defect of the endoderm.

Importance of the superficial tissue layer for the indentation stiffness of articular cartilage

2002 ◽  
Vol 24 (2) ◽  
pp. 99-108 ◽  
Author(s):  
R.K Korhonen ◽  
M Wong ◽  
J Arokoski ◽  
R Lindgren ◽  
H.J Helminen ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Tissue Layer ◽  
Superficial Tissue

scholarly journals Transformational change in the field of diffuse optics: From going bananas to going nuts

2019 ◽  
Vol 13 (01) ◽  
pp. 1930013 ◽  
Author(s):  
Sergio Fantini ◽  
Giles Blaney ◽  
Angelo Sassaroli
Keyword(s):  
Breast Tissue ◽  
Modulation Frequency ◽  
Transformational Change ◽  
Optical Studies ◽  
Diffuse Optics ◽  
Phase Measurements ◽  
Scattering Coefficients ◽  
Non Invasive ◽  
Maximal Sensitivity ◽  
Superficial Tissue

The concept of region of sensitivity is central to the field of diffuse optics and is closely related to the Jacobian matrix used to solve the inverse problem in imaging. It is well known that, in diffuse reflectance, the region of sensitivity associated with a given source–detector pair is shaped as a banana, and features maximal sensitivity to the portions of the sample that are closest to the source and the detector. We have recently introduced a dual-slope (DS) method based on a special arrangement of two sources and two detectors, which results in deeper and more localized regions of sensitivity, resembling the shapes of different kinds of nuts. Here, we report the regions of sensitivity associated with a variety of source–detector arrangements for DS measurements of intensity and phase with frequency-domain spectroscopy (modulation frequency: 140[Formula: see text]MHz) in a medium with absorption and reduced scattering coefficients of 0.1 and 12 cm[Formula: see text], respectively. The main result is that the depth of maximum sensitivity, considering only cases that use source-detector separations of 25 and 35 mm, progressively increases as we consider single-distance intensity (2.0[Formula: see text]mm), DS intensity (4.6[Formula: see text]mm), single-distance phase (7.5[Formula: see text]mm), and DS phase (10.9[Formula: see text]mm). These results indicate the importance of DS measurements, and even more so of phase measurements, when it is desirable to selectively probe deeper portions of a sample with diffuse optics. This is certainly the case in non-invasive optical studies of brain, muscle, and breast tissue, which are located underneath the superficial tissue at variable depths.

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