English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. This study is the first trial to apply the method of filtered back projection(FBP) to reconstruct three-dimensional (3-D) bulk density images viacosmic-ray muons. We also simulated three-dimensional reconstruction imagewith dozens of muon radiographies for a volcano using the FBP method andevaluated its practicality. The FBP method is widely used in X-ray and CT image reconstruction but has notbeen used in the field of muon radiography. One of the merits of using the FBPmethod instead of the ordinary inversion method is that it does not require aninitial model, while ordinary inversion analysis needs an initial model. We also added new approximation factors by using data on mountain topographyin existing formulas to successfully reduce systematic reconstructionerrors. From a volcanic perspective, lidar is commonly used to measure andanalyze mountain topography. We tested the performance and applicability to a model of Omuroyama, amonogenetic scoria cone located in Shizuoka, Japan. As a result, it wasrevealed that the density difference between the original and reconstructedimages depended on the number of observation points and the accidental errorcaused by muon statistics depended on the multiplication of total effectivearea and exposure period. Combining all of the above, we established how to evaluate an observationplan for volcanos using dozens of muon radiographies.

Feasibility of three-dimensional density tomography using dozens of muon radiographies and filtered back projection for volcanos