scholarly journals Kajian Sistem Radiografi Digital sebagai Pengganti Sistem Computed Radiography yang Mahal (Halaman 40 s.d. 43)

2014 ◽  
Vol 17 (50) ◽  
Author(s):  
Susilo ◽  
Sunarno ◽  
I Ketut Swakarma ◽  
Rudi Setiawan ◽  
Edy Wibowo
Keyword(s):  
Computed Radiography ◽  
X Ray ◽  
Single Lens ◽  
Intensifying Screen

Sisitem radiografi diagnostic yang ada pada bagian radiologi Rumah Sakit Daerah (RSD) atau Puskesmas di Indonesia umumnya masih menggunakan system Radiografi Konvensional (RK) dengan film radiograf sebagai media penangkap citra. Berbeda dengan system Computed Radiography (CR)  tanpa film (filmless) yang sudah ada di RS tipe A atau RS maju di kota-kota besar. Dalam studi sebelumnya telah dilakukan pencitraan system radiografi digital  diagnostic berbasis X-Ray Intensifying Screen, diperoleh file radiograf digital dengan resolusi rendah, sehingga kalau dibesarkan citra radiograf menjadi pecah. Pada studi kali ini telah dikaji kemungkinan penggunaan kamera digital jenis single lens reflex pada  ruang kedap cahaya. Hasil eksperimen diperoleh hasil file radiograf digital dengan resoluasi lebih tinggi dibanding sebelumnya. Kajian ini bisa dikembangkan menjadi system radiografi digital dengan memodifikasi unit penangkat gambar pada sistem RK, sehingga sistem ini bisa menjembatani antara pembacaan radiograf analog menggunakan film menjadi file radiograf digital, sekaligus sebagai pengganti sistem CR  yang relative mahal.

Yttrium-tantalate-based phosphors for x-ray intensifying screen

2004 ◽  
Author(s):  
Amalia Hristea ◽  
Elisabeth-Jeanne Popovici ◽  
Laura Muresan ◽  
Rodica Grecu ◽  
Laura Silaghi-Dumitrescu ◽  
...  
Keyword(s):  
X Ray ◽  
Intensifying Screen

Applicability Study of Computed Radiography to NDE for Piping and Component in Nuclear Power Plant

2010 ◽  
Author(s):  
Takashi Hasebe ◽  
Nobuki Tamai ◽  
Syohei Tatsuno ◽  
Yuma Itahashi ◽  
Kiyoaki Tokunou
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Image Quality ◽  
Nuclear Power ◽  
Computed Radiography ◽  
High Energy ◽  
Thick Wall ◽  
X Ray ◽  
Digital Imaging Technology

In Radiography Testing (RT) that is an important nondestructive testing as the quality control, the digital imaging technology rapidly provides advancement. The digital imaging technology is more effective than the film method on an environmental side and the cost side, such as unnecessary of the film storage and a chemical treatment by digital output. Especially, in the medical field, the advancement by the digitalized image data processing is remarkable, and it is attempted the upgrade of the inspection technology. However, RT that uses the high-energy radiation and the fast film is a main current in an industrial field, and it has not arrived at digitalization yet. Therefore, in an industrial RT, digitalization is expected and the examination standardization is required also in ASME, JSME, and JIS. We, Mitsubishi Heavy Industries (MHI), studied an applicability of Computed Radiography (CR) to Non-Destructive Examination (NDE) for welds of piping and thick wall component in nuclear power plant. At first, MHI researched image quality of CR for piping. In this research, it was confirmed that the images of testing results by CR method are equivalent to that by film method in terms of visibility of IQI (Image Quality Indicator) and detection performance of welding defects. And we founded the optimized shooting conditions for piping. Second, MHI researched image quality of CR for thick wall component. In the result, the noise shown in fig.1 was occurred on CR image when the thick wall component such as pressure vessel is radiographed with high energy. It is speculated that the primary cause of this noise is the scattered X-ray effect (shown in fig.2). Therefore it is necessary to investigate the effect of the scattered X-ray on CR image. In this study, to reduce the scattered X-ray effect on CR image, we investigated the effect of 1) screen, 2) screen + filter on image quality of CR for thick wall component. And we studied the optimized shooting conditions and parameters for thicker component than piping to aim for more application. Finally, we applied CR to the pipings and components for nuclear power plant with the optimized shooting conditions and parameters.

scholarly journals A pilot study evaluating erect chest imaging in children, using the Lodox Statscan digital X-ray machine

2009 ◽  
Vol 13 (4) ◽  
pp. 80 ◽  
Author(s):  
Rupesh Baloo Daya ◽  
Maurice A Kibel ◽  
Richard Denys Pitcher ◽  
Lesley Workman ◽  
Tania S Douglas ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Diagnostic Accuracy ◽  
Chest Radiography ◽  
Computed Radiography ◽  
Significant Proportion ◽  
Chest Radiographs ◽  
X Ray ◽  
Airway Narrowing ◽  
Cr System

ABSTRACT Background: Chest radiography accounts for a significant proportion of ionising radiation in children. The radiation dose of radiographs performed on the Lodox Statscan system has been shown to be lower than that of a computed radiography (CR) system. The role of the Lodox Statscan (hereafter referred to as the Statscan) in routine erect chest radiography in children has not been evaluated. Objective: To evaluate the image quality and diagnostic accuracy of erect paediatric chest radiographs obtained with the Statscan and compare this with conventional erect chest images obtained with a CR system. Materials and Methods: Thirty three children with suspected chest pathology were enrolled randomly over a period of three months. Erect chest radiographs were obtained with the Statscan, and a Shimadzu R-20J X-ray machine coupled with a Fuji FCR 5000 CR system. Image quality and diagnostic accuracy and diagnostic capability were evaluated between the two modalities. Results: The erect Statscan allowed superior visualisation of the three major airways. Statscan images however, demonstrated exposure and movement artifacts with hemidiaphragms and ribs most prone to movement. Bronchovascular clarity was also considered unsatisfactory on the Statscan images. Conclusion: The Statscan has limitations in erect chest radiography in terms of movement artefacts, exposure fluctuations, and poor definition of lung markings. Despite this, the Statscan allows better visualisation of the major airways, equivalent to a ‘high KV’ film at a fraction of the radiation dose. This supports the finding of an earlier study evaluating Statscan images in trauma cases, where the images were taken supine. Statscan has great potential in assisting in the diagnosis of childhood tuberculosis where airway narrowing occurs as a result of nodal compression.

scholarly journals X‐Ray‐Computed Radiography and Tomography Study of Electrolyte Invasion and Distribution inside Pristine and Heat‐Treated Carbon Felts for Redox Flow Batteries

2019 ◽  
Vol 8 (3) ◽  
pp. 1901214 ◽  
Author(s):  
Marcus Gebhard ◽  
Maike Schnucklake ◽  
André Hilger ◽  
Maximilian Röhe ◽  
Markus Osenberg ◽  
...  
Keyword(s):  
Computed Radiography ◽  
X Ray ◽  
Redox Flow Batteries ◽  
Heat Treated ◽  
Flow Batteries ◽  
X Ray Computed ◽  
Treated Carbon

Scale analysis using X-ray microfluorescence and computed radiography

2014 ◽  
Vol 95 ◽  
pp. 408-411 ◽  
Author(s):  
J.P. Candeias ◽  
D.F. de Oliveira ◽  
M.J. dos Anjos ◽  
R.T. Lopes
Keyword(s):  
Computed Radiography ◽  
Scale Analysis ◽  
X Ray
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