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Ahkmad Haris Sulistiyadi
Technic of Radiodiagnostic and Radiotherapy Department, Polytechnic Health Ministry of Semarang
Health Professions

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Comparative Analysis of Silver Generated Fixer of Saturated with Electrolytic Method and Deposition Of NaOH 5 M Sri Mulyati; Jeffri Ardiyanto; Ahkmad Haris Sulistiyadi
Jurnal LINK Vol 10, No 1 (2014): Januari 2014
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1566.354 KB) | DOI: 10.31983/link.v10i1.276

Abstract

The purpose of this study was to determine the weight of the silver produced from silver recovery process using electrolysis and chemical deposition method with which NaOH 5 M. As well as to determine the method most widely produced silver from both methods. This research is an experimental study. Data collection was performed on material that has been saturated with fixer electrolysis method and precipitation with NaOH 5 M. Fixer solution that has been saturated by 20 liters divided by two. Furthermore, each volume by 10 liters silver recovery process performed by the method of electrolysis and precipitation with NaOH 5 M. The results showed that the silver recovery by electrolysis method produces silver as much as 29 grams, while silver recovery with NaOH 5 M resulted in the deposition of silver as much as 27 grams. Of both methods are the most widely produced silver is a method of electrolysis. Besides electrolysis method has the advantage of faster process, more practical, in generating pure silver is ready for sale. But it has the disadvantage expensive appliance. While the deposition method is cheaper, long process, longer chemical contamination and dangerous, impractical, drying takes a long time to do a new purification by combustion (burning with welding tools).
Implementation of Compliance Testing Program on a Direct Digital Radiography (DDR) X-Ray System at the Radiography and Imaging Laboratory of the Health Polytechnic Ministry of Health Semarang Gatot Murti Wibowo; Rasyid Rasyid; Ahkmad Haris Sulistiyadi
Jurnal LINK Vol 10, No 2 (2014): Mei 2014
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (566.403 KB) | DOI: 10.31983/link.v10i2.263

Abstract

Technological evolution from conventional to digital in diagnostic imaging bring a change in the implementation of Quality Control (QC) of radiology. As a part of the Quality Assurance (QA), QC Radiology is implemented to determine the eligibility condition of the radiography equipment used for the radiological examinations. A Direct Digital Radiography (DDR) unit has been installed in Radiography Laboratory (Lab 3), School of Radiodiagnostic and Radiotherapy, the Health Polytechnic of Semarang since February 2013. However, routine performance tests of the equipment have never been performed. This study aimed to obtain baseline data by assessing the equipment parameters of the X-ray and the digital-DDR systems (illumination collimator; collimator accuracy; beam alignment; tube leakage; kVp accuracy; timer accuracy; mA linearity; reproducibility; HVL, and dark image; nonuniformity; noise; bad pixels; lag respectively). Accuracy and reproducibility of the DDR unit were measured following the procedure of Perka Bapeten No. 9-2011 (for X-ray System) and IEC 62220-1: 2003 (for digital system. Data were analyzed descriptively by QC-DR software. Results showed that X-rays system and digital system had overall good performance. Signal non-uniformity was found in the value of Local Signal to Noise Ratio (LSNRNU) and Global Signal to Noise Ratio (GSNRNU. Non-uniformity caused by the characteristics of the detector and the lack of correction in system performance. Signal correction software needed to be developed to reach signal uniformities. Spatial resolution and low contrast detectability testing also needed to be performed to ensure the ability of the DDR unit to produce image resolution and contrast picture of the object.
Co-Authors Gatot Murti Wibowo Jeffri Ardiyanto Rasyid Rasyid Sri Mulyati