Background: MSCT Thorax examination is using to diagnose desease inside thorax include mass, MSCT Thorax using 3-5 mm slice thickness and can be recons into 1 mm. Slice thickness value will affect to saptial resolution and contrast resolution, then this research has doing in recons variation 2, 3 and 4 mm with mass clinical. This research had done in Radiology Installation RS Panti Rapih Yogyakarta. The purposes is to know the different in MSCT Thorax image quality with Slice thickness variation and to know which give the best image quality in MSCT Thorax. Methods: The type of this research is an experimental research using analytical study. The experiment is conducted by three scanning in CT Scan thorax using the same parameters and different Slice thickness there are 2 mm, 3 mm to 4 mm. The image taken on same area scanning for each slice thickness. Furthermore, for each image was measured by radiologist with check list. From each image was evaluated by radiologist with check list. Data from estimation was analyzed with Friedman test because hipotesis type is comparatif with more than two sample and type data is ordinal. Result: The results of the study showed that there is differences image quality in MSCT Thorax with p value is 0,001 (< 0,05). Between three slice thickness variation, slice thickness 2 mm have the optimal image quality with mean rank 2,57. Conclusion : The result of this study show that slice thickness 2 mm is better than 3 and 4 mm
Pada awal 2020, dunia dikejutkan dengan mewabahnya pneumonia baru yang bermula dari Wuhan, Tiongkok. Wabah ini diberi nama coronavirus disease 2019 (COVID-19) dan menyebabkan penyakitCoronavirus Disease2019 (COVID-19). Namun Pada tanggal 16 Januari 2022 ini Dinas Kesehatan kota Pekanbaru menyebutkan bahwa kota Pekanbaru telah memasuki level 1 PPKM. Sudah ada beberapa sekolah dan universitas yang telah memulai perkuliahan dengan tatap muka. Oleh karena itu, tujuan dari penelitian ini yaitu menganalisa tingkat kinerja terhadap penanggulangan covid-19 di lingkungan kampus Stikes Awal Bros Pekanbaru. Penelitian ini menggunakan metode Importance Performance Analysis (IPA) yang termasuk pada penelitian kuantitatif deskriptif yang setelahnya dapat diolah datanya menggunakan SPSS. Sasaran pada penelitian ini yaitu selurih mahasiswa dan mahasiswi Stikes Awal Bros Pekanbaru. Hasil Penelitian yang dapat kita tarik menurut diagram kartesius bahwa hasil penelitian menunjukkan terdapat 2 atribut yang harus kita pertahankan dan 3 atribut yang harus kita tingkatkan kinerja dalam penanggulangan Covid-19 di STIKes Awal Bros Pekanbaru.
Algoritma Filtered Back Projection (FBP) telah menjadi algoritma standar untuk rekonstruksi citra dalam computed tomography (CT) selama bertahun-tahun, tetapi algoritma ini menciptakan kemungkinan artefak dan peningkatan noise gambar yang mencolok ketika dosis radiasi dikurangi secara berlebihan. Dengan kemajuan teknologi dan peningkatan kapasitas komputasi, algoritma Adaptive Statistical Iterative Reconstruction (ASIR) telah muncul kembali sebagai alternatif potensial. Tujuan dari tinjauan ini adalah untuk menetapkan apakah secara umum bahwa algoritma ASIR mengurangi dosis radiasi dan meningkatkan kualitas gambar di CT dibandingkan dengan algoritma FBP. Tinjauan sistematis literatur dari 2011 hingga 2022 dilakukan menggunakan Elsevier, Google Scholar, Pubmed, AJR, dan Science Direct, Physica Medica dan Korean Journal of Radiology. Sebanyak 11 artikel dikategorikan sebagai artikel sinopsis atau studi klinis evaluasi kinerja. Hasilnya menunjukkan bahwa penggunaan algoritma IR mengurangi noise gambar objektif, dan setidaknya mempertahankan resolusi spasial dan deteksi kontras rendah, bahkan ketika dosis dikurangi. Kesimpulannya, secara umum bahwa algoritma ASIR dapat dengan mengurangi dosis radiasi namun harus memperhatikan level ASIR dalam meningkatkan kualitas gambar di CT dibandingkan dengan algoritma FBP. Kata kunci: FBP; ASIR; gambar; dosis
Conformity test needs to be done in order to avoid deviation of X-rays photo. One of the test is conformity test collimator beam to X-ray. It aims to make sure angle and distance shift does not occur. This study was done at Radiology Installation of Arifin Achmad Hospital, Riau. This study is quantitative with experimental design by using collimator test tool. Tests were be done three times to each big and small focal spot. Based on Ministry of Health No. 1250 on 2009, deviation tolerance limit value is ≤ 2% FFD for conformity test of collimator beam and being ≤ 3° for the center point conformity test. The results of calculations on the small focal spot for X1 + X2 are respectively 2,25 cm, 2,25 cm, and 2,25 cm with an average value of 2,25 cm. In the calculation results of Y1 + Y2 for small focal spots, the results are respectively 0,45 cm, 0,50 cm and 0,50 cm with an average value of 0,48 cm. Then the calculation results on the large focal spot for X1 + X2 obtained results respectively 2,25 cm, 2,20 cm and 2,15 cm with an average value of 2,20 cm. the results of the calculation of Y1 + Y2 for large focal spots, respectively are 0,45 cm, 0,45 cm, and 0,45 cm with an average value of 0,45 cm. This conformity test got the deviation value exceed the tolerance limit on X axis namely of 2.25 cm in average on small focal spots and 2.20 cm on big focal spots. Conformity test results of the beam alignment entirely showed that center point was in a small circle with < 1.5° value. This means there is no deviation of center point which exceed tolerance limit.
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