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ARTEFAK ALIASING CITRA MRI HUMERUS MENGGUNAKAN BODY COIL PADA PENGATURAN VARIASI FREQUENCY ENCODING DIRECTION DAN PHASE OVERSAMPLING Rini Indrati; Ahmad Ali Hamdan; Dartini Dartini; Marichatul Jannah
Jurnal Riset Kesehatan Vol 8, No 1 (2019): MEI 2019
Publisher : Poltekkes Kemenkes Semarang

Pemeriksaan MRI humerus menggunakan body coil sering ditemukan artefak aliasing. Terdapat dua cara untuk menghilangkan artefak aliasing yaitu dengan pengaturan frequensi encoding direction dan phase oversampling. Tujuan penelitian untuk mengetahui perbedaan artefak aliasing pada gambar MRI humerus dengan menggunakan body coil dalam variasi pengaturan frequensi encoding direction dan phase oversampling serta menentukan pengaturan terbaik frequensi encoding direction dan phase oversampling. Penelitian adalah eksperimental one shot case study. Variasi frequensi encoding direction adalah head to feet dan feet to head sedangkan phase oversampling adalah 0%, 50% dan 100%. Penilaian gambar dari 16 volunteer dilakukan oleh dokter spesialis radiologi meliputi kejelasan artefak aliasing. Data dianalisis menggunakan uji Friedman dilanjutkan uji Wilcoxon pada tingkat kesalahan 5%. Ada perbedaan artefak aliasing gambar MRI humerus menggunakan body coil dengan variasi pengaturan frequensi encoding direction dan phase over sampling dengan nilai p kurang dari 0,001. Frequensi encoding direction head to feet pada phase oversampling maksimum menghasilkan gambar yang paling baik. Ada perbedaan artefak aliasing gambar MRI humerus menggunakan body coil dengan variasi pengaturan frequensi encoding direction dan phase over sampling. Gambar terbaik diperoleh dengan frequensi encoding direction head to feet dan phase oversampling 100%.

RADIATION DOSE REDUCTION ON BREAST AREA BY USING LEAD APRON: A PRE-EXPERIMENTAL STUDY IN ABDOMINAL CT Akhmad Haris Sulistiyadi; Susi Tri Isnoviasih; Dartini Dartini; Eri Hiswara
Jurnal Imejing Diagnostik (JImeD) Vol 5, No 1: January 2019
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/jimed.v5i1.3987

Backgroud: Previous researches show that the use of out of plane shielding can reduce the radiation dose received by radiosensitive organs around the scan area on CT scan. There is a special shielding designed for CT scans, but currently the type of shielding available in almost all radiology installations is the lead apron. This study aims to determine the dose received by the breast area on CT abdominal scan without shielding and its reduction by giving lead apron shielding on 1800 and 3600.Methods:This is quantitative research with a pre-experimental design. Abdominal CT scan was performed on a whole body CT phantom whose characteristics are close to human body tissue. The radiation dose received by the breast area was measured by Termoluminisence-dosemeter (TLD). TLD’s were placedon the same points. Scanning was performed using Siemens Somaris/5 Syngo, repeated in three conditions: without shielding, lead apron shielded (equivalent to 5 mm Pb) by 1800 and 3600. The rouitne protocol was used (120 kv and 200 mA) Data was analyzed by Paired t-test to determine the difference in radiation dose received and descriptive analysis for know the level of reduction.Results:The radiation dose received by the breast area without shielding, with shielding 1800, and with shielding 3600 were respectively 0.653 mSv, 0.367 mSv, and 0.242 mSv. There were significant differences in the dose received by the breast area (p value 0.05) by using shielding. Compared to unshieldied condition, there was a decrease of 43.95% when shielded 1800, and a decrease of 62.94% when shielded 1800.Conclusion:Lead apron is effective for reducing radiation dose on breast in abdominal CT. 3600 shielding provides higher reduction than 3600 shielding, so it can be considered to be applied in clinical procedure.

Perbandingan Informasi Citra Potongan Axial T2 Antara Turbo Spin Echo (TSE) Dengan Half-Fourier Aquisition Single-Shot Turbo Spin Echo (HASTE) Pada Pemeriksaan Magnetic Resonance Cholangiopancreatography (MRCP) Adilfi Amalia Yuniar; Dartini Dartini; Rasyid Rasyid; Bagus Dwi Handoko; Nanang Sulaksono
Jurnal Imejing Diagnostik (JImeD) Vol 7, No 2: JULY 2021
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/jimed.v7i2.7464

Backgroud: MRCP is a non-invasive imaging examination, which is used for the evaluation of biliary tract, pancreatic duct, and gallbladder. Pulse sequences which can be used to visualize organs in MRCP on T2 weighting is using a fast pulse sequences such as sequences TSE or Haste. The purpose of this research was to knowing the difference image information between T2 axial TSE with Haste and where better to use between the two sequences on axial T2 MRCP examination.Methods: This type of research is experimental observational approach, it has been carried out in the best MRI 1.5 Tesla at RSU Haji Surabaya. Sample used were 5 patients. Each patient performed two pieces of axial T2 sequences in which the TSE and Haste. Furthermore, the image submitted to the three doctors radiologist to fill out a questionnaire that has been provided to assess the image consisting of the liver, gallbladder, common bile duct (CBD), pancreas, intrahepatic duct and an assessment of the artifacts.Results: The results of analytical assessment Wilcoxon test, for the entire anatomy with ρ value of 0.002 which means that ρ 0.05, and the artifacts show the ρ value of 0.006, which means ρ 0.05. This proves that there are differences in image information between T2 axial TSE with T2 axial Haste the MRCP examination. At each of anatomy, liver has ρ value of 0,071 (ρ 0.05), gallbladder has ρ value of 0.317 (ρ 0.05), CBD has ρ value of 0.003 (ρ 0.05), pancreas has ρ value of 0.014 (ρ 0.05) and intrahepatic duct has ρ value of 0.004 (ρ 0.05). Based on the mean rank statistical test results show sequence Haste better in generating image information on the whole anatomy, but in each of anatomy based on the mean rank of gallbladder both sequences are equally good in showing gallbladder, whereas to display the liver, CBD, pancreas, and intrahepatic duct, the results showed T2 Haste mean rank better, it is because it has the characteristics of high Haste T2 signal intensity and better in reducing motion artifacts.Conclusion: Wilcoxon test analysis results expressed Ha accepted, meaning that there is a difference between the image information pieces axial T2 TSE with Haste the MRCP examination. The mean rank shows Haste superior to TSE, this is because the artifacts on TSE and therefore contributes to the respondent's assessment, other than that Haste has a high signal intensity so that it can show more clearly ducts.

PENGARUH VARIASI BERAT BADAN TERHADAP KENAIKAN TEMPERATUR TUBUH DAN NILAI SPECIFIC ABSORPTION RATE PADA PEMERIKSAAN MRI BRAIN Dimas Prakoso; Fatimah; Bagus Abimanyu; Dartini
JRI (Jurnal Radiografer Indonesia) Vol. 1 No. 1 (2018)
Publisher : Perhimpunan Radiografer Indonesia (PARI)

Background : MRI brain is a routine examination, after finished examination will felt warm and sweaty on the back. The heat produced by the SAR effect affected by the body weight examined. This research to determine increasing body temperature and SAR value after MRI brain examination based on different body weight. Methods :The kind of this research is experiment. Research has been done at thirteen (13) samples with characteristic as follows : consisted of 3 men and 10 women with variation of body weight 45 kg until 75 kg. Samples had normal body temperature, no abnormalities in the head, and no claustrophobia. Each samples measure body weight and body temperature before MRI examination, then performed examination of MRI brain used brain routine protocol during 19 minutes 49 seconds. After that, measure body temperature again to find the increasing body temperature and saw the SAR value on SAR information. Then analyzed the affection of the variation of body weight and increasing body temperature, and variation of body weight and SAR value. Data were analysed statistically by using Linear Regression test. Results : The results showed that there were significant affection between variation of body weight and increasing body temperature (p value<0,05) significant with very strong influence (R Square=0,889) and negative correlation with equation y=2,098–0,024x.On variation of body weight and SAR value showed that there were significant affection (p value<0,05) with medium influence (R Square=0,596) and positive correlation with equation y=0,214+0,004x. Conclusion : Based on these results indicate thatmore body weight, increase body temperature will decrease due to the fat in people overweight and more body weight, SAR value will increase according the amount of RF exposure required

PROSEDUR PEMERIKSAAN MRI WRIST JOINT PADA KASUS DISRUPSI DISTAL RADIOULNAR JOINT DENGAN MENGGUNAKAN GENU COIL Hendriawan; M. Irwan Katili; Dartini
JRI (Jurnal Radiografer Indonesia) Vol. 2 No. 1 (2019)
Publisher : Perhimpunan Radiografer Indonesia (PARI)

ABSTRACT Background: Procedure of MRI wrist joint examination on disruption case of Distal Radioulnar Joint at radiology installation of RS Panti Rapih Yogyakarta using genu coil. The purpose of this research is to know the procedure of MRI wrist joint examination in DRUJ disruption case using genu coil, to know the reason for the use of genu coil for the examination of wrist joint and to know the reason for adding the PD FatSat sequence and STIR on MRI wrist joint examination. Methods: The type of this research is qualitative research with case study approach. Data collection by observation, interview, and documentation. This study was conducted from February to June 2018. Respondents in this study were 1 radiologist, 1 sending doctor and 3 radiographers, and the subjects of this study is 1 patient with diagnoses having DRUJ disorder or disruption. Data analysis in this research using interactive model. Result: The results of this study showed that the procedure of MRI wrist joint examination in DRUJ disruption case at radiology installation of RS Panti Rapih using genu coil and using 10 examination sequences were: axial PD FatSat, axial T1 FSE, axial T2 FSE, axial STIR irFSE, coronal PD FatSat, coronal T1 FSE, coronal T2 FSE, coronal STIR irFSE, sagital PD FatSat, dan sagital T1 FSE. The reason for using genu coil on the MRI wrist joint examination because genu coil can deliver the signal well, so it can produce a good picture, and because the size of the coil is large then has a wide coverage so that all of parts wrist joint is covered. The reason for the addition of FatSat and STIR sequences is FatSat to suppress fat around the wrist joint so the odim fluid or effusion fluid in the joints can be seen more clearly, and STIR sequence has a very high ability to exhibit pathological disorders. Conclusion : Procedure for MRI examination of wrist joints in disruption case of DRUJ using genu coil at Radiology Installation of Panti Rapih Hospital Yogyakarta.The reason for the wrist joint MRI examination using the coil genu becouse the result of wrist joint examination so far can produce a good picture. And the reason for the wrist joint MRI examination in disruption of DRUJ case was added by the Fat Sat and STIR sequences, which were to suppress the fat around the wrist joint so the liquid odim or effusion fluid in the joint could be seen more clearly.

Informasi Anatomi dan Dosis Radiasi pada MSCT Brain Pediatric Menggunakan Adaptive Statistical Iterative Reconstruction (ASiR)-V Fitri Indraratma; Dartini Dartini; Agung Nugroho Setiawan
Jurnal Imejing Diagnostik (JImeD) Vol 9, No 1: JANUARY 2023
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/jimed.v9i1.9471

Background: Multislice CT Scan (MSCT) brain examination in pediatric cases should pay attention to the lowest possible dose but still provide optimal anatomical information. Pediatric has a higher risk of developing cancer compared to adults who receive the same dose. The purpose of this study is to obtain the optimal value of the use of the Adaptive Statistical Iterative Reconstruction (ASIR)-V technique with variations in tube current strength and Iterative Reconstruction value which is implemented in pediatric patients under the age of 5 (five) years. Methods: This research was experimental with brain image samples of pediatric patients at the Radiology Installation of RSUD dr. Moewardi Surakarta. The variations of the tube currents selected were 80, 100, and 165 mA with a combination of AR20, AR40, AR60, and AR80 variations. Anatomical information processed descriptively sourced from the assessment of 3 (three) radiologists who were experienced in assessing MSCT images. Meanwhile, the effect of tube current variation on radiation dose was tested using linear regression. Results: The results showed differences in anatomical information between the combinations of 165 mA-AR60 and 165 mA-AR80 "very clear", 165 mA-AR20 "clear", 80 mA-AR20 "fairly clear" and 100 mA-AR80 "less clear". There was an effect of strong variation of tube current on radiation dose with a regression coefficient value of 0.690. The estimated effective doses of the three tube current values were still below the national Dose Reference Level (DRL). Conclusions: It was concluded that there were differences in anatomical information on the MSCT brain pediatric examination with variations in tube current and ASiR-V, there was an effect of variations in mA on radiation dose and mA values and the optimal value of the combination of techniques studied is 80 mA and 20% Iterative Reconstruction.

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