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Rasyid Rasyid
Technic of Radiodiagnostic and Radiotherapy Department, Polytechnic Health Ministry of Semarang
Health Professions

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Analysis of Parameters Variation Time Repetition; Time Echo; and Flip Angle of Signal-To-Noise Ratio and Image Characteristics 3D TOF-MRA Brain Ariyani Eka Wardani; Sugiyanto Sugiyanto; Rasyid Rasyid
Jurnal LINK Vol 8, No 3 (2012): September 2012
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat, Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1890.717 KB) | DOI: 10.31983/link.v8i3.314

Abstract

This type of research was an experiment, performe dat using 0.35 Tesla MRI Unit. Data obtained by performing an MRI examination of the 3 (three) patients with 9 (nine) parameter variations. Assessment is done by measuring the SNR image using software on the MRI Unit and assessment of the intensity of the arteries by making the questionnaire to 3 (three) observers to assess the degree of clarity of the anterior cerebral artery, middlecerebralartery, posterior cerebral artery, basilar artery, and vertebral artery. Then conducted an analysis of data obtained. The study states that the examinationis performed with the parameters TR 38 ms, TE 9.6 ms, and FA 30 ° has the highest SNR valuesand intensity values clarity more apparent than variations of arterie so ther parameters including routine parameters.
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 Ahkmad Haris Sulistiyadi Ariyani Eka Wardani Gatot Murti Wibowo Panji Wibowo Nurcahyo Siti Daryati Sugiyanto Sugiyanto