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ANILISIS IMAGE QUALITY CT SCAN THORAX DENGAN VARIASI LUNG WINDOW KERNEL PADA MSCT SIEMENS SOMATOM EMOTION 6 IMAGE QUALITY ANALYSIS CT SCAN THORAX LUNG WINDOWS WITH KERNEL VARIATIONS USING MSCT SIEMENS SOMATOM EMOTION 6 Angga Yosainto Bequet; Yeti Kartikasari; Sri Mulyati; Susi Tri Isnoviasih
Jurnal Imejing Diagnostik (JImeD) Vol 5, No 2: July 2019
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/jimed.v5i2.4431

Background: To be able to show the Lung anatomy in detail in CT Scan Thorax lung window then required a sharp image quality. One way to improve image sharpness is to use kernel settings. The purpose of research is to know the difference of the quality of anatomical image with kernel variation CT Scan Thorax Lung Window and know the proper kernel selection to produce CT scan of thorax lung windows the bestMethods: Type of research is an experiment. The study was conducted using a CT image scan of thorax on axial lung window slices in cases of lung tumors in the kernel B50s, B60s, B70s, B80s, and U90s. The research was conducted by measuring the CT image quality of thorax scan on the windows lung by way of questionnaire assessment to 5 radiologist as the observer to CT Scan image to determine the level of clarity of anatomical criteria.Results: The results showed that there were significant differences in the quality of anatomical imagery with kernel variation of B50s, B60s, B70s, B80s, U90s with p-value 0.05. CT images can thorax lung windows that have the best anatomical image quality of the samples taken are shown by the use of the kernel U90s.Conclusions: There are significant differences in the quality of anatomical imagery with kernel variation of B50s, B60s, B70s, B80s, U90s. The kernel that generates image detail for CT thorax lung windows is the U90s kernel

Efektifitas Penambahan Source to Image Distance (SID) terhadap Penurunan Dosis Radiasi pada Pemeriksaan Radiografi Cranium Angga Yosainto Bequet; Panji Wibowo Nurcahyo; Akhmad Haris Sulistiyadi
Jurnal Imejing Diagnostik (JImeD) Vol 8, No 1: JANUARY 2022
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/jimed.v8i1.8043

Background: Cranial radiographs are routinely made in 2 projections, namely Antero Posterior (AP) and Lateral with a minimum distance of 100 cm from the radiation source to the image receptor. In addition, it has been shown that increasing the SID from 40 to 48 inches reduces the skin dose even when the requirement for an increase in mAs is considered. A 44-inch or 48-inch SID is recommended where departmental equipment and protocols allow. This study aims to determine the effectiveness of the addition of SID to decrease the radiation dose on cranium radiographs.Methods: This type of research is a pre-experimental quantitative. The study was conducted at the radiology laboratory of Diploma Three Program of Radiology Purwokerto, Semarang Health Politechnic of Ministry of Health. The research subject is a Radiographic Xray Cranial Phantom. At the time of exposure, the radiation dose was measured and the resulting image was measured CNR value.Results: The results of radiation dose measurements at each SID setting for AP cranium radiographs are shown in the table above. setting SID 100 cm produces a radiation dose of 5.58 mSv, SID 110 cm produces a radiation dose of 5.16 mSv, SID 120 cm produces a radiation dose of 5.02 mSv, SID 130 cm produces a radiation dose of 4.84 mSv, SID 140 cm produces a radiation dose of 4.64 mSv and SID 150 cm produces a radiation dose of 4.36 mSv. There are differences in radiation dose values between SID settings of 100 cm, 110 cm, 120 cm, 130 cm, 140 cm and 150 cm with a statistical test p-value 0.001. The results of statistical tests on the Contrast to Noise Ratio value on changes in the SID value of the AP cranium radiography examination showed no significant difference. The p-value of the statistical test is 0.274 which means there is no difference in the CNR value between the SID settings of 100 cm, 110 cm, 120 cm, 130 cm, 140 cm and 150 cm.Conclusions: An increase in SID causes a decrease in radiation dose. The increase in SID did not cause a significant difference to the quality of the Contrast to Noise Ratio on the AP cranium radiograph image.

Nilai Contrast to Noise Ratio (CNR) Radiograf Thorax PA antara menggunakan Grid dengan tanpa Menggunakan Grid Angga Yosainto Bequet; Luthfi Rusyadi; Fatimah Fatimah
Jurnal Imejing Diagnostik (JImeD) Vol 6, No 2: JULY 2020
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/jimed.v6i2.5653

Background: In the Thoracic Radiography Technique, applying the use of a grid to control scattered radiation almost never occurs, because the organ that is radiologically examined is classified as soft tissue dominance. Consideration of using grid is very important when the thickness of the thoracic organ exceeds 10 cm, thus potentially increasing scattering radiation which will affect the value of the Contrast to Noise Ratio (CNR). The purpose of this study is to examine the difference between the use of grid and non-grid for the chest radiography techniques in the context of CNR values.Methods: In the study, a hundred healthy patient uderwent the chest posteroanterior (PA) radiographic examination, a half of the total patients was examined with grid whereas the rest without the grid embedded. All the resulted images were analyzed by means of the pixel value measurements at the specific organs of interest (costea and pulmonary tissues) in inside and outside of the lung organs, using 1,5 mm of ROI from Dicom software. The statistical analysis of the CNR values was performed by comparing the results between the groups.Results: There is a significant difference in the contrast values on the PA radiographs between those using the Grid and without using the Grid (p-value 0.001). The average contrast value on the chest radiograph with Grid is 2283.60, while without Grid is 1878.58. In the Noise values, it also deems significance (p-value = 0.001). The average of the noise values employing the Grid in the technique is 25.32, whereas without Grid is 17.84. In the Contrast to Noise Ratio (CNR), the diference seems to be significant (p-value 0.001). The average CNR radiograph of the PA chest using the Grid is 100.79, while the non-grid is 125.62.Conclusions: The application of the grid in radiography technique gives significant difference in the image results (contrast, noise, and CNR), when compare to the radiographic techniques without the grid. Using the grid in the Technique improve the qPA-thoracic quality of the chest images.

Perbandingan Nilai Index Exposure pada Radiografi Thorax dengan Perubahan Kombinasi Nilai mA dan s Berbeda pada Nilai mAs yang Sama Angga Yosainto Bequet; Susi Tri Isnoviasih
Jurnal Imejing Diagnostik (JImeD) Vol 8, No 2: JULY 2022
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/jimed.v8i2.9324

Background: In CR, there is an indicator called Exposure Index (EI) which displays how much exposure is used for a particular examination. The Exposure Index depends on the exposure factor, the total area of the detector exposed to radiation, and the object being exposed (Bontrager Lampignano, 2014). One of the exposure factors that is often regulated by the radiographer is mAs. Milliampere seconds (mAs) determine the number of X-rays produced. The purpose of this study was to determine the differences in the Exposure Index Values on Chest Radiography with Changes in the Combination of Different mA and s Values at the Same mAs Value.Methods: This research is a type of quantitative research with a pre-experimental design. The object of this research is the thorax phantom. Data were collected by exposing thorax the chest phantom, then recording the resulting Exposure Index value. mA and s value variations that are set are 25mA x 320 ms, 160mA x 50 ms and 400mA x 20ms. Data analysis was carried out using statistical tests.Results: From the statistical test results it is known that there is no significant difference in the Exposure Index Value on Thorax Radiography between the 25mA x 320 ms combination group, the 160mA x 50 ms combination and the 400mA x 20ms combination with a p-value 0.05 (p-value = 0.151) . The reason for the absence of a difference in the Exposure Index value is the variation in the combination of different mA and s values for the same mAs because with the same mAs, the quantity / intensity value of the X-ray radiation produced is also the same or there is no increase or decrease. With the same x-ray radiation intensity, the radiation received by the Imaging Plate is also the same so that the value of the Exposure index is also the same.Conclusions: There is no significant difference in the Exposure Index Value on Chest Radiography with Changes in the Combination of Different mA and s Values at the Same mAs Value

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