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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Radiology
Journal Basic Information
Journal DOI :
The Korean Society of Radiology (KSR)
Editor in Chief :
Volume & Issues
Volume 2, Issue 4 - Dec 2008
Volume 2, Issue 3 - Sep 2008
Volume 2, Issue 2 - Jun 2008
Volume 2, Issue 1 - Mar 2008
Selecting the target year
PDA based Bluetooth Wireless Radiation Counter
Im, Sang-Heui ; Park, Dae-Sung ; Jin, Gye-Hwan ;
Journal of the Korean Society of Radiology, volume 2, issue 1, 2008, Pages 5~10
This study developed a PDA based wireless communication radiation measuring instrument using Bluetooth. The proposed system is composed of Student Radiation Monitor of Vernier using GM (Geiger Mueller) counter tube as a radiation measuring sensor, LabPro of Vernier as a module for data collection, Promi SD 101 of Initium, which can make Bluetooth communication up to 30 m, for wireless data transmission, and HP 5550 embedded with Pocket PC 2003 as OS for data storage and display. Because GM counter tube is used as a radiation measuring sensor, the system cannot measure radiation energy but measures count volume and count rate. When the result of natural radiation measuring by the PDA based system was compared with that by a PC based system, it was found that the proposed system transmits and receives data without distortion.
The Wireless Radiation Measurement Using Embedded System
Kim, Hyong-Jong ; Park, Dae-Sung ; Lee, Sang-Bock ;
Journal of the Korean Society of Radiology, volume 2, issue 1, 2008, Pages 11~16
Radiation is used in various field, including medical science, engineering science, agricultural science and other industrial fields and the use frequency of radiation is increasing thanks to the development of radiation technology. Although radiation contributes to the mankind so much, we must pay attention to radiation damage by its influence on human body. To use radiation properly and prevent the radiation damage, it is necessary to measure radiation exactly and to practice thorough research and education on the basis of this measurement. In this study, I suggest the method to measure radiation wirelessly without the limit of time and space, not approaching radiation having a harmful effect on human body by using ubiquitous computing technology. For the realization of suggested method, the wireless transmission technology of CDMA network is used and after installing embedded system in PDA, the measurement value is displayed through accessing CDMA network with PDA in radiation measurement system of having fixed IP. If we use the proposed method of this study, we don't have to approach radiation that is harmful to the human and can read the measurement value that is marked in PDA through CDMA network by radiation measurement system of having fixed IP.
Usefulness of Three-Dimensional CT Image in Meningioma Using Contrast Method
Lee, Jun-Haeng ; Baek, Sung-Eun ; Lee, Sang-Bock ; Kim, Yong-Wan ;
Journal of the Korean Society of Radiology, volume 2, issue 1, 2008, Pages 17~21
Because of the reason that the meningioma is enhanced lately, we started the study to maximally enhance the meningioma. we were to know the relation between meningioma and vessels in the skull and compared 3D CT angiography with the conventional angiography. we got the data from 6 patients performed by both 3D CT angiography and there were 5 cases in sphenoidal ridge and 1 case parasagittal sinus. Injecting the contrast media at 3 ml/sec, 120 ml and then the CT number reached 100, we started the study using the medical system Program(smart prep). The scan parameters were HS-Mode(1.25 mm / 7.5 mm) right after being injected all and reconstructed with 0.5 mm interval. We compared the study with the conventional angiography after reconstructing the images required by using 3D-Med software Program(Rapidia). Seeing the consequences, the maximum enhancing time in the menigioma is about 120~180 seconds after injecting the contrast media and we distinguished the relation between vessels and tumors at the time and 1 case showed us the aneurysm with a tumor clearly at the time too. It was very helpful to the operation that the 3D images required by injecting the contrast media to the patients with meningioma distingushed between tumors and vessels dimensionally.
Improvement in the Quality of Ultrasonographic Images Using Wavelet Conversion and a Boundary Detection Filter
Han, Dong-Kyun ; Rhim, Jae-Dong ; Lee, Jun-Haeng ;
Journal of the Korean Society of Radiology, volume 2, issue 1, 2008, Pages 23~29
The present study proposed a method that dissolves ultrasonographic images into multiple resolutions using wavelet conversion and a boundary detection filter and improves the quality of ultrasonographic images through boundary detection filtering. In order to reduce noises and strengthen edges, the proposed method adjusted selectivity coefficient by area step by step from a low resolution image obtained from wavelet converted images to a high resolution image and performed edge filtering in consideration of direction. Through this method, we generated a selective low pass filtering effect in areas except edges by decreasing the wavelet coefficient for pixels in spot areas, improved continuity by smoothing edges in the tangential direction, and enhanced contrast by thinning in the normal direction. Through an experiment, we compared the filtering method using a non linear anisotropic expansion model and the filtering method using wavelet contraction structure in single resolution.
Measurement of Branching Ratio for broad 27-keV Resonance of
Reaction by using Time-of-flight Method with Anti-Compton NaI(Tl) Spectrometer
Lee, Sam-Yol ;
Journal of the Korean Society of Radiology, volume 2, issue 1, 2008, Pages 31~34
The neutron capture spectrum for the light nuclide was very useful to study the nuclear structure. In the present study, the capture gamma-ray from the 27-keV resonance of
reaction were measured with an anti-Compton NaI(Tl) spectrometer and the 3-MV Pelletron accelerator of the Research Laboratory for Nuclear Reactors at the Tokyo institute of technology. A neutron Time-of-Flight method was adopted with a 1.5 ns pulsed neutron source by the
reaction. In the present experiment, a Teflon((
)n) sample was used The sample was disk with a diameter of 90mm. The thickness of sample was determined so that reasonable counting rates could be obtained and the correction was not so large for the self-shielding and multiple scattering of neutrons in the sample, and was 5mm. The primary gamma-ray transitions were compared with previous measurement of Kenny.