Acute Stroke: Improved Nonenhanced CT Detection—Benefits of Soft-Copy Interpretation by Using Variable Window Width and Center Level Settings

Radiology ◽  
1999 ◽  
Vol 213 (1) ◽  
pp. 150-155 ◽  
Author(s):  
Michael H. Lev ◽  
Jeffrey Farkas ◽  
Joseph J. Gemmete ◽  
Syeda T. Hossain ◽  
George J. Hunter ◽  
...  
Keyword(s):  
Acute Stroke ◽  
Window Width ◽  
Soft Copy ◽  
Variable Window

Image Focus Measure Based on Energy of High Frequency Components in S-Transform

2013 ◽  
pp. 162-180
Author(s):  
Muhammad Tariq Mahmood ◽  
Tae-Sun Choi
Keyword(s):  
High Frequency ◽  
Window Size ◽  
Accurate Method ◽  
Image Sharpness ◽  
Focus Measure ◽  
Window Width ◽  
S Transform ◽  
Variable Window ◽  
Focus Image ◽  
Frequency Components

Focus measure computes sharpness or high frequency contents in an image. It plays an important role in many image processing and computer vision applications such as shape from focus (SFF) techniques and multi-focus image fusion algorithms. In this chapter, we discuss different focus measures in spatial as well as in the transform domains. In addition, we suggest a novel focus measure in S-transform domain, which is based on the energy of high frequency components. A localized spectrum, by using variable window size, provides a more accurate method of measuring image sharpness as compared to other focus measures proposed in spectral domains. An optimal focus measure is obtained by selecting an appropriate frequency dependent window width. The performance of the proposed focus measure is compared with those of existing focus measures in terms of three dimensional shape recovery and all-in-focus image generation. Experimental results demonstrate the effectiveness of the proposed focus measure.

Image Focus Measure Based on Energy of High Frequency Components in S-Transform

2011 ◽  
pp. 189-208
Author(s):  
Muhammad Tariq Mahmood ◽  
Tae-Sun Choi
Keyword(s):  
High Frequency ◽  
Window Size ◽  
Accurate Method ◽  
Image Sharpness ◽  
Focus Measure ◽  
Window Width ◽  
S Transform ◽  
Variable Window ◽  
Focus Image ◽  
Frequency Components

Focus measure computes sharpness or high frequency contents in an image. It plays an important role in many image processing and computer vision applications such as shape from focus (SFF) techniques and multi-focus image fusion algorithms. In this chapter, we discuss different focus measures in spatial as well as in the transform domains. In addition, we suggest a novel focus measure in S-transform domain, which is based on the energy of high frequency components. A localized spectrum, by using variable window size, provides a more accurate method of measuring image sharpness as compared to other focus measures proposed in spectral domains. An optimal focus measure is obtained by selecting an appropriate frequency dependent window width. The performance of the proposed focus measure is compared with those of existing focus measures in terms of three dimensional shape recovery and all-in-focus image generation. Experimental results demonstrate the effectiveness of the proposed focus measure.

The role of nursing in the rehabilitation of acute stroke patients: Toward a unified theoretical perspective

Pflege ◽  
1999 ◽  
Vol 12 (1) ◽  
pp. 21-27
Author(s):  
Marit Kirkevold
Keyword(s):  
Acute Stroke ◽  
Theoretical Perspective ◽  
Stroke Patients ◽  
Role Of Nursing ◽  
Rolle Der Pflegenden

Eine Übersicht der bestehenden Literatur weist auf Unsicherheiten bezüglich der spezifischen Rolle der Pflegenden in der Rehabilitation von Hirnschlagpatientinnen und -patienten hin. Es existieren zwei unterschiedliche Begrifflichkeiten für die Rolle der Pflegenden, keine davon bezieht sich auf spezifische Rehabilitationsziele oder Patientenergebnisse. Ein anfänglicher theoretischer Beitrag der Rolle der Pflege in der Genesung vom Hirnschlag wird als Struktur unterbreitet, um die therapeutischen Aspekte der Pflege im Koordinieren, Erhalten und Üben zu vereinen. Bestehende Literatur untermauert diesen Beitrag. Weitere Forschung ist jedoch notwendig, um den spezifischen Inhalt und Fokus der Pflege in der Genesung bei Hirnschlag zu entwickeln.

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