International Journal of Radiology and Imaging Techniques最新文献

{"title":"Dose Profile Study in Head CT Scans Using a Male Anthropomorphic Phantom","authors":"Gómez Álvaro Mauricio Ladino, Santana Priscila do Carmo, Mourão Arnaldo Prata","doi":"10.23937/2572-3235.1510071","DOIUrl":"https://doi.org/10.23937/2572-3235.1510071","url":null,"abstract":"Computed tomography (CT) test is an efficient and non-invasive method to obtain data about internal structures of the human body. CT scans contribute with the highest absorbed doses in population due X-ray beam attenuation and it has raised concern in radiosensitive tissues. Techniques for the optimization of CT scanning protocols in diagnostic services have been developing with the objective of decreasing the absorbed dose in the patient, aiming image quality within acceptable parameters for diagnosis by noise control. Routine head scans were performed using GE CT scan of 64 channels programmed with automatic exposure control and voltages of 80, 100 and 120 kV attaching the noise index in approximately 0.5%, using the tool of smart mA. An anthropomorphic adult male phantom was used and radiochromic film strips were placed to measure the absorbed dose deposited in areas such as the lens, thyroid and pituitary for study of dose deposited in these important areas containing high radiosensitive tissues. Different head scans were performed using optimized values of mA.s for the different voltages. The absorbed dose measured by the film strips were in the range of the 0.58 and 44.36 mGy. The analysis of noise in the images is within the acceptable levels for diagnosis, and the optimized protocol happens with the voltage of 100 kV. The use of other voltage values can allow obtain better protocols for head scans.","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127219817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Incidental Extra-Colonic Findings in CT Colonography at Riyadh Region","authors":"Alanazi Muhannad, Ali Nasir Ahmed","doi":"10.23937/2572-3235.1510067","DOIUrl":"https://doi.org/10.23937/2572-3235.1510067","url":null,"abstract":"Introduction: Computed tomography colonography (CTC) is a new radiologic technique for examination of the colorectum. The search for, analysis and interpretation of extra-colonic findings (ECFs) are a matter of permanent debate and review, given the arguments for and against them. Objective: To assess the prevalence and type of extracolonic findings (ECFs) in a screening population undergoing computed tomography colonography (CTC) in Riyadh region. Methods: This retrospective study was conducted in Riyadh region. To achieve the objectives of this study 305 subjects medical records were reviewed, where male represented 55% of participants and female represented only 45%. Results: About 21% of subjects had any type Extra Colonic Findings (ECFs) where about 74 incidental findings were identified in 65 patients. Out of these findings; 6 patients (9%) required immediate medical attention or urgent imaging/intervention, these included high suspicious of extracolonic malignancy or active infection, 16 patients (25%) required either further imaging and characterization, or follow up imaging, these included undetermined masses or nodules, while 43 patients (66%) required either reassurance or life style modification, which included extensive atherosclerotic changes, fatty liver or spondylolisthesis. Conclusion: Colon cancer is one of the leading causes of mortality and morbidity in our Saudi Arabia community. Early detection of colon cancer and its precursor (i.e. polyps) is essential for successful management.","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132178248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlation of Pathologic and Radiologic Complete Response in the Axilla after Neoadjuvant Chemotherapy for Breast Cancer","authors":"C GoochJessica, Borjas Timothy, C. Jennifer, Kaplowitz Elianna, G. Amber, A. Deborah, S. Richard, M. Linda, Schnabel Freya","doi":"10.23937/2572-3235.1510056","DOIUrl":"https://doi.org/10.23937/2572-3235.1510056","url":null,"abstract":"","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124011473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the Variations of Image Density Index of MDCT for Healthy Lungs","authors":"Cha Won-Bin, Yun Sok-Chan, Ri Chan-Ung, Chang Chol-Ho","doi":"10.23937/2572-3235.1510055","DOIUrl":"https://doi.org/10.23937/2572-3235.1510055","url":null,"abstract":"We selected several image density indices to establish CAD for prediction of biopsy in lung diseases. Our results suggested that significant difference was not observed in the image density indices between bilateral lungs at each slice level. Our own designed image indices may be reliable parameters in the establishment of CAD system and pathologic diagnosis for lung disease [1,2].","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133967925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiation Dose Reduction Comparing Dual Axis Rotational Coronary Angiography against Conventional Coronary Angiography in a Population with 100% Suspected Coronary Artery Disease: A Randomized Trial","authors":"Szarfer Jorge","doi":"10.23937/2572-3235.1510054","DOIUrl":"https://doi.org/10.23937/2572-3235.1510054","url":null,"abstract":"Objective: We sought to compare the radiation dose, contrast volume, and procedure time between dual-axis rotational coronary angiography (DARCA) and conventional coronary angiography (CCA) techniques in a setting characterized by a prevalence of 100% suspected coronary artery disease. Background: Previous studies have shown a reduction in radiation dose and contrast volume using DARCA, but these results have not been replicated in coronary artery disease (CAD) populations. Methods: All-comers, prospective, randomized, open-label trial. Cine acquisition dose-area product (DAP), cumulative Air Kerma (AK), effective dose (E), fluoroscopic time, contrast volume, AK, cine acquisition DAP (CADAP), fluoroscopic DAP (F-DAP) and total DAP were compared between DARCA and CCA groups. Results: We included 503 consecutive patients with suspected CAD, 252 assigned to DARCA and 251 to CCA. Stable coronary artery disease in 465 cases and non-ST elevation acute coronary syndrome in 38. Mean age: 61.88 ± 11.2 years, male gender 70.2%. DARCA arm patients showed lower total E dose (6.85 (4.55-10.83) vs. 7.91 (5.5811.94) Sv; p = 0.0023), and cine E (3.00 (2.00-4.00) vs. 4.00 (3.00-5.00) Sv; p < 0.0001). Total DAP was also lower (40.3 (26.8-63.7) vs. 46.5 (32.8-70.2) Gycm2; p = 0.0023, as a consequence of a lower CADAP (16.3 (10.5-22.9) vs. 23.4 (17.4-32.0) Gycm2; p < 0.0001, with lower AK (367 (2481497) vs. 497 (381-1827) mGy; p < 0.0001, with less contrast medium used (90 (60.0-106.0) vs. 100 (75.0-120.0) ml; p = 0.014. Conclusion: In a population with 100% suspected coronary artery disease, DARCA reduces contrast material volume and radiation dose compared with CCA. Abbreviations CCA: Conventional Coronary Angiography; DARCA: DualAxis Rotational Coronary Angiography; CAD: Coronary Artery Disease; CAG: Coronary Angiography; VTG: Ventriculography; AK: Air Kerma; DAP: Dose-Area Product; CADAP: Cine Acquisition Dose-Area Product 15 ISSN: 2572-3235 DOI: 10.23937/2572-3235.1510054 Szarfer. Int J Radiol Imaging Technol 2019, 5:054 • Page 2 of 5 • second on 27 cm magnification, whereas CCA acquisition was obtained at 15 frames per second on 22 cm magnification. Five experienced operators participated in the study and were encouraged to not modify their usual coronary angiography routines. Data collection and study endpoints Radiation doses were automatically recorded as dose area product (DAP) in Gycm2 and as cumulative Air Kerma (AK) in mGy, at procedure time. DAP is a surrogate measurement for the entire amount of energy delivered to the patient by the x-ray beam and is most often utilized in estimating stochastic risk [14]. Kerma is an acronym for “kinetic energy released in material”; AK represents the energy extracted from the x-ray beam per unit of mass of air in a small-irradiated air volume. Approaches to patient dosimetry are different for procedures that involve the use of fluoroscopy equipment. During these examinations, the tube amps and Kilovolts change conti","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114232581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Injuries Caused by Safety Belt Following a Traffic Accident","authors":"Delgado-Moraleda Juan-José, Nogués-Meléndez Pablo, L. Luisa, Melo-Villamarín José, Anca Anca Oprisan, Veiga-Canuto Diana","doi":"10.23937/2572-3235.1510053","DOIUrl":"https://doi.org/10.23937/2572-3235.1510053","url":null,"abstract":"Wearing seat belt makes driving safer. Nevertheless, it can cause particular lesions. In this case report, we present a woman suffering the characteristic safety belt lesions on bowel, spine and aorta.","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133568013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Atypical Case: Bilateral Radiation Necrosis","authors":"K. Murat, Tuncez Hulya Cetin, E. Ozgur, Adibelli Zehra Hilal","doi":"10.23937/2572-3235.1510052","DOIUrl":"https://doi.org/10.23937/2572-3235.1510052","url":null,"abstract":"Temporal lobe necrosis (TLN) is often seen in nasopharyngeal carcinoma secondary to less frequent other extracranial malignancies. Radiotherapy is one of the most frequently used methods in the treatment of nasopharyngeal carcinoma. This method can have many side effects. One of the side effects associated with high-dose radiotherapy is cerebral necrosis. Cerebral radiation is the sum of the dose of radiotherapy given as the most important risk factor for necrosis. It is often seen within the first 5 years after the completion of treatment. At present, the development of temporal lobe necrosis, radiotherapy planning, and current techniques are less common than their predecessors. The combination of radiotherapy and chemotherapy treatment also increases the risk of cerebral necrosis. TLN symptoms are a highly variable spectrum. For this reason, the lesion can mimic many diseases. Differential diagnosis of TLN includes intracranial nasopharyngeal carcinoma (NPC). Expansion, second primer intracranial neoplasm, brain metastasis, meningeal spread and brain abscess. On the way to diagnosis, imaging methods can help, but no method is specific. However, magnetic resonance (MR) imaging features commonly seen in radiation necrosis are a soap-bubble-like core and a Swedish cheese-like appearance. In the MR spectroscopy; there is no increase in the colonic peak in the lesion, in the MR perfusion; perfusion increase in perilesional edema and the lack of diffusion restriction is a finding that supports the diagnosis of radiation necrosis. Imaging features can be diagnosed by evaluating with history and clinical findings. Accurate diagnosis and early detection is very important, as it will avoid unnecessary interventions. We will talk about the diagnosis of nasopharynx carcinoma and bilateral temporal lobe necrosis secondary to radiation at different times in a patient who has completed radiotherapy treatment.","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133710422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagnostic Efficiency and Reproducibility of Hysterosalpingography","authors":"Ahmed Shimaa Abdalla, Taleb Hesham Abo","doi":"10.23937/2572-3235.1510051","DOIUrl":"https://doi.org/10.23937/2572-3235.1510051","url":null,"abstract":"Objective: To evaluate the accuracy of HSG compared to hysteroscopy and or laparoscopy and compare intra and interobserver variability. Methods: 200 infertile females underwent hysterosalpingography, hysteroscopy and/or laparoscopy as part of an infertility work up. HSG examinations were retrospectively reviewed by three radiologists, we compared inter-observer variability, differences between the two results of reading the same examination after three months were compared to calculate intra-observer variability. Final diagnosis was compared to hysteroscopy and/or laparoscopy. The overall sensitivity, specificity, PPV, NPV and accuracy of each HSG diagnosis was assessed. Results: Intra-observer reliability was variable: observer 1 (k = 0.21; observer 2 (k = 0.57); observer 3 (k = 0.65). Highest agreement was seen in the detection of a normal uterus, normal tubes and uterine filling defect, lowest agreement seen in the detection of uterine and pelvic adhesions. First round results showed moderate agreement between the three pairs of radiologists (k = 0.53-0.42), second round results showed the substantial agreement of observer 1 (k = 0.62), moderate agreement was seen between radiologist 2 and 3 (k = 0.44). With consensus diagnosis of all readers combined, HSG overall accuracy in tubal pathology and uterine cavitary lesions diagnosis was 93%, and 85%, respectively. Lowest accuracy was seen in uterine adhesions 71%. Conclusion: HSG is more accurate in tubal evaluation than the uterine cavity assessment. HSG interpretation is somewhat subjective, although experience and training may improve reporting skills and interpretation results, however, considerable observer variability exists. The gynecologist should carefully interpret HSG results and provide future management based on comprehensive clinical and radiological data.","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125158100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Is there a Histopathologic Correlation of Prostatic PI-RADS Score 3 Lesions in Transition Zone in MRI with the Dynamic Contrast Curve Type? A Retrospective Single-Center Study","authors":"Stuppner Sigmund, Rui António","doi":"10.23937/2572-3235.1510046","DOIUrl":"https://doi.org/10.23937/2572-3235.1510046","url":null,"abstract":"Citation: Stuppner S, Ruiu A (2019) Is there a Histopathologic Correlation of Prostatic PI-RADS Score 3 Lesions in Transition Zone in MRI with the Dynamic Contrast Curve Type? A Retrospective Single-Center Study. Int J Radiol Imaging Technol 5:046. doi.org/10.23937/2572-3235.1510046 Accepted: May 15, 2019: Published: May 17, 2019 Copyright: © 2019 Stuppner S, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126179786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Applications and Limitations of Magnetic Resonance Defecography in Evaluation of Pelvic Floor Dysfunction Disorders","authors":"K. Megha, Kachewar Sushil G, Lakhkar Dilip L","doi":"10.23937/2572-3235.1510045","DOIUrl":"https://doi.org/10.23937/2572-3235.1510045","url":null,"abstract":"Citation: Kumra M, Kachewar SG, Lakhkar DL (2019) Applications and Limitations of Magnetic Resonance Defecography in Evaluation of Pelvic Floor Dysfunction Disorders. Int J Radiol Imaging Technol 5:045. doi.org/10.23937/2572-3235.1510045 Accepted: April 04, 2019: Published: April 06, 2019 Copyright: © 2019 Kumra M, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.","PeriodicalId":444035,"journal":{"name":"International Journal of Radiology and Imaging Techniques","volume":"276 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133958524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}