Automatic slice thickness measurement on three types of Catphan CT phantoms.

. To develop an algorithm to measure slice thickness running on three types of Catphan phantoms with the ability to adapt to any misalignment and rotation of the phantoms..

Evaluation of silicone rubber-lead shield's effectiveness in protecting the breast during thoracic CT.

Radiation of thoracic computed tomography (CT) involves the breast although it is not considered an organ of interest. According to the International Commission on Radiological Protection (ICRP) No. 103, the breast is an organ with a high level of sensitivity when interacting with x-rays, increasing the potential risk of breast cancer.

Impact of ROI Size on the Accuracy of Noise Measurement in CT on Computational and ACR Phantoms.

Background: The effect of region of interest (ROI) size variation on producing accurate noise levels is not yet studied.

Objective: This study aimed to evaluate the influence of ROI sizes on the accuracy of noise measurement in computed tomography (CT) by using images of a computational and American College of Radiology (ACR) phantoms.

Material And Methods: In this experimental study, two phantoms were used, including computational and ACR phantoms.

Effect of variation of silicone rubber RTV 52 and bluesil catalyst 60 R composition on bolus material for electron beam radiotherapy application.

A bolus is a material equivalent to soft tissue and is directly placed on the skin surface during radiotherapy. It is commonly used to increase the dose on the skin surface in electron beam radiation. A typical material for a bolus is silicone rubber (SR).

Examination the Hydrolysis Feasibility of OPEFB Biomass Using Aspergillus niger as Cellulase Enzyme-producing Fungus.

The objective of this study was to obtain optimization results from the biological hydrolysis of Oil Palm Empty Fruit Bunches (OPEFB) using Aspergillus niger (A. niger) BIOTROP 2173 isolated from grain. Optimized hydrolysis parameters include temperature, pH and time.

An artifact-free thyroid shield in CT examination: a phantom study.

This study was to evaluate dose reduction and resulting image quality of a new synthetic thyroid shield based on silicon rubber (SR)-lead (Pb) composites and compare to tungsten paper (WP) and a Radibabarrier thyroid shields in CT examination of the neck. The synthetic SR-Pb thyroid shield had a Pb percentage from 0 to 5 wt% and a thickness of 0.6 cm.

Development of a head CT dose index (CTDI) phantom based on polyester resin and methyl ethyl ketone peroxide (MEKP): a preliminary study.

This paper aims to develop phantoms for measurement of computed tomography dose index (CTDI) based on a polyester resin mixed with methyl ethyl ketone peroxide (MEKP) as catalyst. CT number and CTDI values of the polyester resin phantoms were compared with a standard polymethyl methacrylate (PMMA) phantom as reference. The percentage of MEKP was varied from 0.

Precipitation Process of CaCO3 from Natural Limestone for Functional Materials.

This article aims to report on the production of precipitated CaCO3, with various morphologies and particle sizes through several methods, namely carbonation methods with CO2 gas bubbling, rapid mixing of the solutions, and carbonation with modified bubbling techniques. The simple bubbling method was performed by flowing CO2 gas into Ca(OH)2 solution until precipitation occurs. This method can produce calcite particles up to 100% at the intermediate temperatures.

Outcome and extent of disability following Japanese encephalitis in Indonesian children.

Objectives: The study aimed to assess outcome, including level of disability, following Japanese encephalitis (JE) in children in Indonesia.

Methods: A cohort of children diagnosed with laboratory-confirmed JE from January 2005 to August 2006 was followed-up, with disability measured at least 4 months after discharge from hospital. An assessment tool that can be used to rapidly determine practical level of disability and the likelihood that a child will be able to live independently after illness, the Liverpool Outcome Score, was used.