PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 5238951

[Optimal magnification ratio for direct macroradiography studies with modulation transfer function (MTF). Studies on enlargement radiography. 37].

Y Ayakawa·S Sakuma·H Okumura
View original source ↗Export metadata ↓

Abstract

The source did not provide an abstract. Follow the original record for more information.

Explore related subjects

Technology, RadiologicJournal Article

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Y Ayakawa, S Sakuma, H Okumura. 1967. [Optimal magnification ratio for direct macroradiography studies with modulation transfer function (MTF). Studies on enlargement radiography. 37].. https://pubmed.ncbi.nlm.nih.gov/5238951/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed1994

Longitudinal image deblurring in spiral CT.

PURPOSE: To assess the feasibility of digital deconvolution techniques to improve longitudinal resolution of spiral computed tomography (CT) multiplanar reformations and evaluate how technical factors in deconvolution affect longitudinal resolution, noise, and edge ringing. MATERIALS AND METHODS: Longitudinal line spread function (LSF) of the system was estimated from longitudinal reformations of transaxial spiral CT images of a step test phantom. By using the estimated LSF, longitudinal reformations of the phantom and three clinical spiral CT studies were deconvolved by the methods of Wiener filtering and constrained iterative deconvolution. Edge ringing and image noise were quantified for Wiener filtering and constrained iterative deconvolution. RESULTS: Longitudinal reformations were substantially deblurred and resolution improved after deconvolution. Anatomic boundaries in clinical images were more clearly delineated after restoration. The methods of Wiener deconvolution and constrained iterative deconvolution improved the sharpness of the phantom step boundary at the expense of increased edge ringing and image noise. CONCLUSION: In longitudinal spiral CT reformations, blurring along the longitudinal axis can be reduced by Wiener filtering or constrained iterative deconvolution.

Technology, Radiologic↗
PubMed1992

Re: Film processing.

Explore the source record for details and available documents.

Technology, Radiologic↗