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  • 발행기관: 대한방사선과학회(구 대한방사선기술학회)
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방사선기술과학(JOURNAL OF RADIOLOGICAL SCIENCE AND TECHNOLOGY)

  • 발행기관 : 대한방사선과학회(구 대한방사선기술학회)(KOREAN SOCIETY OF RADIOLOGICAL TECHNOLOGY)
  • 출처구분 : 학회
  • 간행물유형 : 학술저널
  • 발행주기 : 계간 (발행월:2,4,6,8,10,12)
  • Print ISSN : 2288-3509
  • 등재정보 : KCI 등재
방사선기술과학
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흉부 전・후방향 검사 시 고관전압 및 산란선 후처리 소프트웨어 적용이 화질과 선량에 미치는 영향
흉부 전・후방향 검사 시 고관전압 및 산란선 후처리 소프트웨어 적용이 화질과 선량에 미치는 영향
김종석(Jong-Seok Kim);주영철(Young-Cheol Joo);이승근(Seung-Keun Lee)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 295-300 (6 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
This study aims to present new chest AP examination exposure conditions through a study on the effect on image quality and patient dose by applying high tube voltage and scatter ray post-processing software during chest AP examination in digital radiography equipment. This study was used a human body phantom and in the chest AP position, the dosimeter was placed horizontally at the thoracic spine 6. The experiment was conducted by dividing into a low tube voltage (70 kVp, 400 ㎃, 3.2 ㎃s) group and a high tube voltage (100 kVp, 400 ㎃, 1.2 ㎃s) group. The collimation size (14″× 17″) and the source to image receptor distance(110 cm) were same applied to both groups. Radiation dose was presented to dose area product and entrance surface dose. Image quality was compared and analyzed by comparing the difference between the signal-to-noise ratio and the contrast-to-noise ratio of the image according to the application of the scatter ray post-processing software under each condition. The average value of the entrance surface dose in the low and high tube voltage conditions was 93.04±0.45 μ㏉ and 94.25±1.51 μ㏉, which was slightly higher in the high tube voltage condition, but the dose area product was 0.97±0.04 μ㏉ and 0.93±0.01 μ㏉. There was a statistically significant difference in the group mean value(p<0.01). In terms of image quality, the values of the signal-to-noise ratio and the contrast noise ratio were higher in the high tube voltage than in the low tube voltage, and decreased when the scattering line post-processing function was used, but the contrast resolution was improved. If there is a scatter ray post-processing function during chest AP examination, it is helpful to actively utilize it to improve the image quality. However, when this function is not available, I thought that applying a higher tube voltage state than a low tube voltage state will help to realize images with a large amount of information without changing the dose.
머리뼈 전-후 축 방향검사 시 Tube 방향설정에 따른 표면선량과 영상분석에 관한 연구
머리뼈 전-후 축 방향검사 시 Tube 방향설정에 따른 표면선량과 영상분석에 관한 연구
정성훈(Sung-Hun Jeong);유재현(Je-hyeon Yoo);임청환(Cheong-Hwan Lim)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 301-306 (6 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
The skull has peripheral organs such as the crystalline lens and thyroid gland, which are highly radiosensitive, but the examination is performed without considering the uneven dose distribution due to the heel effect at the time of the current Skull Town’s examination. However, no studies have been conducted on the exposure dose of surrounding organ tissues due to the difference in image density due to the heel effect and the non-uniformity of the dose. Using the cathode (-) and anode (+) set on the Tube to measure the scattered radiation along the Tube direction as a guide, change 30° and 37∘ in the cathode direction and 30∘ and 37∘ in the anode direction. It was given and investigated 5 times to obtain scattered radiation. image measurements were SNR, PSNR, RMSE, and MAE. Measurement results Measurement results of surrounding organ doses when the Tube direction was 30∘ and 37∘ The dose was low when the direction was cathodic in all organs (p<0.000). Both cathodes were higher in the image measurements(p<0.04). Continuous research may be needed for diagnostically valuable imaging and minimization of patient exposure dose.
초음파로 진단된 자궁근종의 위험인자 평가
초음파로 진단된 자궁근종의 위험인자 평가
양성희(Yang Sung-Hee)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 307-313 (7 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
The purpose of this study was to analyze the risk factors for uterine myoma diagnosed by ultrasonography in Korea women and to evaluate the risk. Among the patients who visited the outpatient department of obstetrics and gynecology at I hospital in Busin between January 2019 and March 2021 for the purpose of examination, 98 patients in the experimental group diagnosed with uterine myoma and 163 patients in the normal control group without other diseases were retrospectively conducted. Among the general characteristics of the subjects, age, body mass index, parity, and menopause showed significant differences between the myoma group and the normal control group. ROC(receiver operating characteristic) curve analysis and logistic regression analysis were performed to obtain the cut off value and odds ratio that can predict the occurrence of uterine myoma. The cut off value for the prediction of uterine myoma was determined to be 30 years old and a body mass index of 23 kg/m2. After that adjusting for menopause, non menopausal cases with a body mass index of 23 kg/m2 and over 39 years of age had the highest odds ratio of 6.04. Therefore, premenopausal women over 40 years of age require regular checkups and thorough weight management. This study was conducted with a small number of subjects. Therefore, there is a limit to generalizing to all Korean women. However, based on this study if a large scale prospective study considering various variables is made, it can play a role as a predictive marker in early detection of uterine myoma.
The Study of Lipid Proton Composition Change in a Rat Model of High Fat Diet Induced Fatty Liver by Magnetic Resonance Spectroscopy Analysis
The Study of Lipid Proton Composition Change in a Rat Model of High Fat Diet Induced Fatty Liver by Magnetic Resonance Spectroscopy Analysis
김상혁(Kim Sang-Hyeok);유승만(Yu Seung-Man)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 315-325 (11 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
The purpose of this study is to investigate the changes in lipid proton (LP) composition according to the induced obese fatty liver and to use it as basic data for treatment and diagnosis of fatty liver in the future. The phantom study was conducted to identify differences between STEAM and PRESS Pulse sequences in LP concentration. A high-fat diet (60%) was administered to eight Sprague-Dawley rats to induce obesity and fatty liver disease. Baseline magnetic resonance imaging /spectroscopy data were obtained prior to the introduction of high-fat diet, and data acquisition experiments were performed after eight weeks using procedures identical to those used for baseline studies. The six lipid proton metabolites were calculated using LCModel software. The correlation between the fat percentage and each LP, revealed that the methylene protons at 1.3 ppm showed the highest positive correlation. The α-methylene protons to carboxyl and diallylic protons showed negative correlation with fat percentage. The methylene proton showed the highest increase in the LP; however, it constituted only 71.86% of the total LP concentration. The methylene proton plays a leading role in fat accumulation in liver parenchyma.
다발성 경화증 질환의 자기공명 T2 강조영상에서 단면 두께 변화에 따른 잡음 평가
다발성 경화증 질환의 자기공명 T2 강조영상에서 단면 두께 변화에 따른 잡음 평가
홍인기(Inki Hong);박민지(Minji Park);강상현(Seong-Hyeon Kang);이영진(Youngjin Lee)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 327-333 (7 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
Magnetic resonance imaging(MRI) uses strong magnetic field to image the cross-section of human body and has excellent image quality with no risk of radiation exposure. Because of above-mentioned advantages, MRI has been widely used in clinical fields. However, the noise generated in MRI degrades the quality of medical images and has a negative effect on quick and accurate diagnosis. In particular, examining a object with a detailed structure such as brain, image quality degradation becomes a problem for diagnosis. Therefore, in this study, we acquired T2 weighted 3D data of multiple sclerosis disease using BrainWeb simulation program, and used quantitative evaluation factors to find appropriate slice thickness among 1, 3, 5, and 7 mm. Coefficient of variation and contrast to noise ratio were calculated to evaluate the noise level, and root mean square error and peak signal to noise ratio were used to evaluate the similarity with the reference image. As a result, the noise level decreased as the slice thickness increased, while the similarity decreased after 5 mm. In conclusion, as the slice thickness increases, the noise is reduced and the image quality is improved. However, since the edge signal is lost due to overlapped signal, it is considered that selecting appropriate slice thickness is necessary.
¹H-NMR Spectroscopy를 이용한 Non-ionic Monomer 조영제의 화학적 구조 분석
¹H-NMR Spectroscopy를 이용한 Non-ionic Monomer 조영제의 화학적 구조 분석
한범희(Beom-Hee Han)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 335-342 (8 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
Studies on the side effects of contrast agents are being discussed based on various cases, but studies analyzing the chemical structure of the underlying contrast agents are difficult to understand as the manufacturers have not disclosed them. Therefore, in this study, the chemical structure of the contrast medium was analyzed using 1H-NMR spectrometer for Omnipaque contrast medium prepared from Iohexol, which is a nonionic iodide contrast medium, Xenetix contrast medium from Iobitridol, and Iomeron contrast medium from Iomeprol. As a result, it was found that the Omnipaque contrast medium of Iohexol had 6 carboxyl groups, 3 carbonyl groups, 4 amine groups, 1 methyl group, and 2 cyano groups. It was found that the Xenetix contrast medium of the iobitridol formulation had 6 carboxyl groups, 3 carbonyl groups, 2 amine groups, and 4 cyano groups. It was found that the Iomeron contrast agent of the Iomeprol formulation had 5 carboxyl groups, 3 carbonyl groups, 4 amine groups, 1 methyl group, and 2 cyano groups. As shown in this study, the chemical structure of the non-ionic monomer contrast agent increases its affinity with water by binding a number of hydroxyl groups (OH) to the carboxyl group. It is necessary to accurately identify each of these factors and analyze the physical and chemical changes of the contrast medium according to various environmental factors.
3D 프린팅 팬텀의 섬광카메라 적용 평가
3D 프린팅 팬텀의 섬광카메라 적용 평가
박훈희(Hoon-Hee Park);이주영(Ju-young Lee);김지현(Ji-Hyeon Kim)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 343-350 (8 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
3D printing technology is an additive manufacturing technology produced through 3D scanning or modeling method. This technology can be produced in a short time without mold, which has recently been applied in earnest in various fields. In the medical field, 3D printing technology is used in various fields of radiology and radiation therapy, but related research is insufficient in the field of nuclear medicine. In this study, we compare the characteristics of traditional nuclear medicine phantom with 3D printing technology and evaluate its applicability in clinical trials. We manufactured the same size phantom of poly methyl meta acrylate(PMMA) and acrylonitrile butadiene styrene(ABS) based on the aluminum step wedge. We used BrightView XCT(Philips Health Care, Cleveland, USA) SPECT/CT. We acquired 60 min list mode for Aluminum, PMMA and ABS phantoms using Rectangular Flood Phantom (Biodex, New York, USA) 99mTcO4 3 mCi(111 MBq), 6 mCi (222MBq) and 57Co Flood phantom(adq, New Hampshire, USA). For the analysis of acquired images, the region of interest(ROI) were drawn and evaluated step by step for each phantom. Depending on the type of radioisotope and radiation dose, the counts of the ABS phantom was similar to that of the PMMA phantom. And as the step thickness increased, the counts decreased linearly. When comparing the linear attenuation coefficient of Aluminum, PMMA and ABS phantom, the linear attenuation coefficient of the aluminium phantom was higher than that of the others, and the PMMA and ABS phantom had similar the linear attenuation coefficient. Based on ABS phantom manufactured by 3D printing technology, as the thickness of the PMMA phantom increased, the counts and linear attenuation coefficient decreased linearly. It has been confirmed that ABS phantom is applicable in the clinical field of nuclear medicine. If the calibration factor is applied through further research, it is believed that practical application will be possible.
국내 방사성동위원소(RI) 폐기물 핵종분석 다중화채널 구축 성과 분석 및 고찰
국내 방사성동위원소(RI) 폐기물 핵종분석 다중화채널 구축 성과 분석 및 고찰
한상준(Han Sang-Jun);이홍연(Lee Hong-Yeon);김보길(Kim Bo-Gil);안은미(An Eun-Mi)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 351-358 (8 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
This research project is a program promoted to seek diversification of domestic radioactive waste analysis institutions, and seeks public development, win-win cooperation, and cooperation between the entrusted institution and the entrusted institution. Accordingly, the entrusted institution established a standard analysis procedure for establishing a quality control system for radioactivity analysis, establishing a radiation control zone, obtaining KOLAS accreditation, and performing proficiency tests, which are the performance ranges requested by the entrusted institution, and intersecting the radioactive isotope waste generated at the actual site. Verification was performed to confirm the analysis quality. In addition, facilities and equipment for radioactivity analysis were supplemented and expanded, and the basic technology foundation and technical skills were secured through securing professional technicians and education/training. It is judged that the entrusted institution will contribute to securing radiation safety through the smooth execution of treatment, disposal, and transportation through value creation and analysis of radioactive waste generated by radioactive isotope-using institutions (research institutes, hospitals, industries, etc.) by succeeding in this research project do.
몬테카를로 시뮬레이션을 통한 중하전입자의 콘크리트 방사화 비교평가
몬테카를로 시뮬레이션을 통한 중하전입자의 콘크리트 방사화 비교평가
배상일(Sang-Il Bae);조용인(Yong-In Cho);김정훈(Jung-Hoon Kim)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 359-365 (7 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
A heavy particle accelerator is a device that accelerates particles using high energy and is used in various fields such as medical and industrial fields as well as research. However, secondary neutrons and particle fragments are generated by the high-energy particle beam, and among them, the neutrons do not have an electric charge and directly interact with the nucleus to cause radiation of the material. Quantitative evaluation of the radioactive material produced in this way is necessary, but there are many difficulties in actual measurement during or after operation. Therefore, this study compared and evaluated the generated radioactive material in the concrete shield for protons and carbon ions of specific energy by using the simulation code FLUKA. For the evaluation of each energy of proton beam and carbon ion, the reliability of the source term was secured within 2% of the relative error with the data of the NASA Space Radiation Laboratory(NSRL), which is an internationally standardized data. In the evaluation, carbon ions exhibited higher neutron flux than protons. Afterwards, in the evaluation of radioactive materials under actual operating conditions for disposal, a large amount of short-lived beta-decay nuclides occurred immediately after the operation was terminated, and in the case of protons with a high beam speed, more radioactive products were generated than carbon ions. At this time, radionuclides of 44Sc, 3H and 22Na were observed at a high rate. In addition, as the cooling time elapsed, the ratio of long-lived nuclides increased. For nonparticulate radionuclides, 3H, 22Na, and for particulate radionuclides, 44Ti, 55Fe, 60Co, 152Eu, and 154Eu nuclides showed a high ratio. In this study, it is judged that it is possible to use the particle accelerator as basic data for facility maintenance, repair and dismantling through the prediction of radioactive materials in concrete according to the cooling time after operation and termination of operation.
전산화단층 모의치료장치의 정도관리 항목 제안
전산화단층 모의치료장치의 정도관리 항목 제안
김연래(Yon-Lae Kim);윤영우(Young-Woo Yoon);정재용(Jae-Yong Jung);이정우(Jeong-Woo Lee);정진범(Jin-Beom Chung)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 367-373 (7 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
A quality assurance of computed tomography(CT) have done seven items that were water attenuation coefficient, noise, homogeneity, spatial resolution, contrast resolution, slice thickness, artifact using by standard phantom. But there is no quality assurance items and methods for CT simulator at domestic institutions yet. Therefore the study aimed to access the CT dose index(CTDI), table tilting, image distortion, laser accuracy, table movement accuracy and CT seven items for CT simulator quality assurance. The CTDI at the center of the head phantom was 0.81 for 80 kVp, 1.55 for 100 kVp, 2.50 for 120 ㎜, 0.22 for 80 kVp at the center of the body phantom, 0.469 for 100 kVp, and 0.81 for 120 kVp. The table tilting was within the tolerance range of ±1.0° or less. Image distortion had 1 ㎜ distortion in the left and right images based on the center, and the laser accuracy was measured within ±2 ㎜ tolerance. The purpose of this study is to improve the quality assurance items suitable for the current situation in Korea in order to protect the normal tissues during the radiation treatment process and manage the CT simulator that is implemented to find the location of the tumor more clearly. In order to improve the accuracy of the CT simulator when looking at the results, the error range of each item should be small. It is hoped that the quality assurance items of the CT simulator will be improved by suggesting the quality assurance direction of the CT simulator in this study, and the results of radiation therapy will also improve.
차트 각도를 이용한 해상력 특성 평가
차트 각도를 이용한 해상력 특성 평가
민정환(Jung-Whan Min);정회원(Hoi-Woun Jeong)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 375-380 (6 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
This study aim was quantitative assessment of MTFs of spectrum of the square wave chart images and Coltman chart images for 0o, 1.7o, 2.2o, 2.9o, 4.1o by using chart method. In general device was AccuRay-650 (DK Medical System, Korea) used, indirect flat panel detector(FPD) Aero (Konica, Japan) used and MATLAB R2019a (MathWorks, USA) used. The result of comparison for each angle of MTF the edge image was highest quantitatively value for MTF finding of showed the best value of 0.1 based on the frequency of 3.5 mm-1, value of 0.1 based on the square wave was frequency of 3.0 mm-1 and value of 0.1 based on the Coltman transform was frequency of 2.4 mm-1. In this study it was significant that the methodology of the international Electro-technical Commission was applied mutandis by using the Fujita method within 2∼3o.
HTO 형태 시료 조제 조건에 따른 삼중수소 계측에 미치는 영향 평가
HTO 형태 시료 조제 조건에 따른 삼중수소 계측에 미치는 영향 평가
안은미(An Eun-Mi);김정훈(Kim Jung-Hoon);이홍연(Lee Hong-Yeon);한상준(Han Sang-Jun);김보길(Kim Bo-Gil)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 381-387 (7 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
In this study, for the measurement of 3H(tritium) radioactivity concentration, a study was conducted on whether the type of cocktail and the material of the vial had an effect on the measurement before liquid scintillation counter measurement on HTO-type samples that had undergone physical and chemical pretreatment. As a result of the study, the efficiency according to the type of cocktail was higher in Ultima Gold LLT than Ultima Flo-AP cocktail with polyethylene (1.49%), glass (5.10%), and teflon (6.58%), respectively. Regarding the effect according to the type of vial, the efficiency and SQP(E) of both Ultima Gold LLT and Ultima Flo-AP showed the highest values in the order of teflon, polyethylene, and glass.
초음파사와 방사선사의 인구학적 및 직무 특성과 직무 만족도의 비교분석
초음파사와 방사선사의 인구학적 및 직무 특성과 직무 만족도의 비교분석
김혜진(Hye-Jin Kim);성열훈(Youl-Hun Seoung)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 389-397 (9 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
The purpose of this study was to compare the demographic and job characteristics and job satisfaction of sonographers (SONO) and radiological technologists (RT). The subjects were a total of 148 people (69 SONO, 79 RT), who had been working in clinical and hospitals. The method was conducted using a questionnaire with a total of 54 questions consisting of demographic characteristics, job characteristics, and job satisfaction. Reliability was secured with Cronbach’s alpha coefficient of 0.6 or higher for the response of the questionnaire. For statistical analysis, descriptive statistics, cross-analysis, independent sample T-test, and correlation analysis using Pearson’s correlation coefficient and Spearman’s correlation coefficient were performed for each occupation. As a result, first, the SONO had more female workers than RT. They are more than three times as many in graduate school and above. Second, the SONO had 4.5 times more morning shift than the RT and no form of weekend shift. Third, the average monthly salary of the SONO is higher than that of the RT, but when a certain portion of the salary goes up, the salary no longer goes up. Fourth, satisfaction with expectations, growth desire, positive mentality, growth opportunity, job importance, organizational attachment was higher SONO than the RT, but self-efficacy was higher in RT than SONO. Last, SONO had higher educational background than RT. It is hoped that the results of this study will be able to understand the job characteristics of SONO and RT and identify the factors of job satisfaction and provide them as fundamental materials for job selection.
방사선검사에 관한 기록 의무화의 필요성
방사선검사에 관한 기록 의무화의 필요성
홍동희(Dong-Hee Hong);임청환(Cheong-Hwan Lim);김연민(Yon-Min Kim);김은혜(Eun-Hye Kim);유세종(Se-Jong Yoo);윤용수(Yong-Su Yoon);임우택(Woo-Taek Lim);정영진(Young-Jin Jung);정홍량(Hong-Ryang Jung);주영철(Young-Cheol Joo);최지원(Ji-Won Choi);강병삼(Byung-Sam Kang);박명환(Myeong-Hwan Park);백금문(Geum-Mun Back);양오남(Oh-Nam Yang);임재동(Jae-Dong Rhim);정봉재(Bong-Jae Jeong)
대한방사선과학회(구 대한방사선기술학회) / 방사선기술과학 제44권 제4호 / 2021 / 399-407 (9 pages)
의약학>방사선과학 / KDC : 기술과학 > 의학 / KCI : 의약학 > 방사선과학
초록보기
This study discussed the validity and necessity of compulsory recording of radiographic examination performed by radiological technologist on patients in medical institutions related to radiation exposure. Also, this study provided reasonable evidence of radiographic examination related medical records can contribute to the improvement of public health. Based on overseas cases of implementing a radiographic examination record system, the essential items to be included in medical record are the exposure date, exposure time, exposure method, exposure conditions that is tube voltage, tube current. Name and license number of the radiological technologist who performed the examination should be include in medical record. It is expected that the medical record of the total amount of radiation exposure per year would be in giving the maximum benefit with the minimum exposure to the medical radiation examination of the patient. In addition, interventional radiography medical record should also include exposure time, type and dose of the contrast medium.