Literature DB >> 2622232

Digital contrast enhancement for online portal imaging.

K W Leszczynski, S Shalev.   

Abstract

Seven digital contrast enhancement algorithms were implemented and evaluated for application to images obtained with an online video portal imaging system. An objective quantitative comparison shows that superior contrast enhancement is obtained using histogram modification techniques. Additional tests made on an image of a humanoid phantom indicate that local (adaptive) histogram modification methods can produce a better contrast in detail than their global counterparts, if the original image is nonuniform in intensity.

Mesh：

Year:  1989        PMID： 2622232     DOI： 10.1007/bf02441470

Source DB:  PubMed          Journal:  Med Biol Eng Comput        ISSN： 0140-0118            Impact factor:   2.602


  10 in total

Review 1.  Video techniques for on-line portal imaging.

Authors:  S Shalev; T Lee; K Leszczynski; S Cosby; T Chu; L Reinstein; A Meek
Journal:  Comput Med Imaging Graph       Date:  1989 May-Jun       Impact factor: 4.790

2.  Digital image enhancement and noise filtering by use of local statistics.

Authors:  J S Lee
Journal:  IEEE Trans Pattern Anal Mach Intell       Date:  1980-02       Impact factor: 6.226

3.  Use of digital fluoroscopy as an on-line verification device in radiation therapy.

Authors:  J Leong
Journal:  Phys Med Biol       Date:  1986-09       Impact factor: 3.609

4.  An on-line electronic portal imaging system for external beam radiotherapy.

Authors:  K S Lam; M Partowmah; W C Lam
Journal:  Br J Radiol       Date:  1986-10       Impact factor: 3.039

5.  Automatic digital contrast enhancement of radiotherapy films.

Authors:  G W Sherouse; J Rosenman; H L McMurry; S M Pizer; E L Chaney
Journal:  Int J Radiat Oncol Biol Phys       Date:  1987-05       Impact factor: 7.038

6.  Adaptive grey level assignment in CT scan display.

Authors:  S M Pizer; J B Zimmerman; E V Staab
Journal:  J Comput Assist Tomogr       Date:  1984-04       Impact factor: 1.826

7.  Fluoroscopic visualization of megavoltage therapeutic x ray beams.

Authors:  N A Baily; R A Horn; T D Kampp
Journal:  Int J Radiat Oncol Biol Phys       Date:  1980-07       Impact factor: 7.038

8.  Digital processing of high-energy photon beam images.

Authors:  H Meertens
Journal:  Med Phys       Date:  1985 Jan-Feb       Impact factor: 4.071

9.  A test object for evaluation of portal films.

Authors:  W R Lutz; B E Bjarngard
Journal:  Int J Radiat Oncol Biol Phys       Date:  1985-03       Impact factor: 7.038

10.  A matrix ionisation chamber imaging device for on-line patient setup verification during radiotherapy.

Authors:  M van Herk; H Meertens
Journal:  Radiother Oncol       Date:  1988-04       Impact factor: 6.280
  10 in total

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