Fatimah Fatimah
Poltekkes Kemenkes Semarang, Indonesia

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Analisa Informasi Citra MRI Cervical Potongan Sagital Pada Variasi Nilai Time Repetition (TR) Dengan Sekuens Short Tau Inversion Recovery (STIR) Siti Masrochah; Fatimah Fatimah; Nurdianty Yunitaningrum
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.v6i2.5822

Abstract

Background: STIR sequences used in the cervical spine due to the cervical spine is surrounded by lots of fluids and fat, to reinforce the picture of the cervical spine. According to Braun in 2003, TR on STIR used is 4000 ms. Meanwhile, according to Erika J. Ulbribh in 2011, TR on STIR sequences was used that 4860 ms. Based on the writer's observation in several hospitals with the same flight characteristics, the value of TR on STIR sequences different - different. At one hospital using TR 5000 ms, then at other hospitals using the TR 3000 ms. TR value is used based on the theory of 2000 ms.Methods: This research is a quantitative study with an experimental approach. Data were collected from May to June 2016 in the. The subjects of this study are volunteers by using a variation of the value of Time Repetition. It is caused during data capture none of the patients with the diagnosis of the lesion or tumour. image of five variations Repetition Time value is 4090 ms, 5190 ms, 6290 ms, 7390 ms and 8490 ms. Selection of variation based on the value of TR used.Results: From the statistical test result known that There are differences in image information MRI Cervical on the variation of the Time Repetition 4090 ms, TR 5190 ms, TR 6290 ms, TR 7390 ms, and TR 8490 ms to the value of ρ value of 0.000 (ρ 0, 05).That is because Repetition Time (TR) sequences Inversion Recovery (IR) should be long enough to provide opportunities so that Net Magnetization Vectors (NMV) can be in full recovery before the next 180 RF pulse inversion. If TR is too short then each network will be recovery with different levels which will ultimately affect the weighting (weighting) is generated.Conclusion: There are differences in Cervical MRI image information on the variation of the value of 4090 ms Repetition Time, TR 5190 ms, TR 6290 ms, TR 7390 ms, and TR 8490 ms to the value of ρ value of 0.000 (ρ 0.05).
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

Abstract

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.