Diagnostic and interventional radiology最新文献

{"title":"Comparison of mammography and ultrasound findings in the follow-up of patients with breast cancer treated with segmental mastectomy followed by intraoperative electron radiotherapy versus external whole breast radiotherapy","authors":"Burçin Tutar, Gül Esen İçten, Ayşe Altınok, Seda Eröz, Nuran Beşe, Cihan Uras","doi":"10.4274/dir.2023.211218","DOIUrl":"10.4274/dir.2023.211218","url":null,"abstract":"<p><strong>Purpose: </strong>This study aims to describe imaging findings in patients treated with intraoperative electron radiotherapy and compare them with those detected in patients treated with external whole breast radiotherapy (WBRT).</p><p><strong>Methods: </strong>The study population consisted of 25 patients who received intraoperative radiotherapy [IORT (21 Gy)] as single-dose radiotherapy and a control group of 25 patients who received WBRT at the same institution. Mammography and ultrasound (US) findings were divided into three groups: minor, intermediate, and advanced. On mammography, mass lesions were considered advanced, and asymmetries or architectural distortions were considered intermediate. Oil cysts, linear scars, and the increase in parenchymal density were considered minor findings. On US, irregular non-mass lesions were considered advanced, and circumscribed hypoechoic lesions or planar irregular scars with shadowing were considered intermediate. Oil cysts, fluid collections, or linear scars were considered minor findings.</p><p><strong>Results: </strong>On mammography, skin thickening (<i>P</i> = 0.001), edema (<i>P</i> < 0.001), increased parenchymal density (<i>P</i> < 0.001), dystrophic calcifications (<i>P</i> = 0.045), and scar/distortion (<i>P</i> = 0.005) were significantly more common in the WBRT group. On US, irregular non-mass lesions, which made interpretation considerably difficult, were significantly more common in the IORT group (<i>P</i> = 0.004). Dominant US findings were fluid collections and postoperative linear or planar scars in the WBRT group. Minor findings were more common in low-density breasts, and major findings (intermediate and advanced) were more common in high-density breasts on both mammographies (<i>P</i> = 0.011) and US (<i>P</i> = 0.027) in the IORT group.</p><p><strong>Conclusion: </strong>Ill-defined non-mass lesions detected on US in the IORT group have not been defined previously. Radiologists should be aware of these lesions because they can be confusing, especially in early follow-up studies. This study has found that minor findings are seen more frequently in low-density breasts, while major findings are more common in high-density breasts in the IORT group. This has not been reported before, and further studies with more cases are needed to verify these results.</p>","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679565/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9246645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of image quality and quantitative parameters in intravoxel incoherent motion imaging at 3-T based on turbo spin-echo and echo-planar imaging in patients with oral cancer.","authors":"Lingjie Yang, Xing Wu, Yu Wang, Guangzi Shi, Huijun Hu, Xiaohui Duan","doi":"10.4274/dir.2023.221849","DOIUrl":"10.4274/dir.2023.221849","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the image quality, apparent diffusion coefficient (ADC), and intravoxel incoherent motion- (IVIM) derived parameters of IVIM imaging based on turbo spin-echo (TSE) and echo-planar imaging (EPI) of patients with oral cancer and to assess the equivalence of the ADC and IVIM-derived parameters.</p><p><strong>Methods: </strong>Thirty patients with oral cancer underwent TSE-IVIM and EPI-IVIM imaging using a 3.0-T system. The distortion ratio (DR), signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), qualitative evaluations of image quality, ADC, pure diffusion coefficient (D), pseudo-diffusion coefficient (D*), and perfusion fraction <i>(f)</i> were compared between the two sequences. The consistency of the quantitative parameters in oral cancer between the TSE and EPI sequences was evaluated using a Bland-Altman analysis.</p><p><strong>Results: </strong>TSE-IVIM had a significantly smaller DR than EPI-IVIM (<i>P</i> < 0.001). The CNR of EPI-IVIM on most of the anatomical sites was significantly higher than that of TSE-IVIM (<i>P</i> < 0.05), while the SNR was not significantly different (<i>P</i> > 0.05). TSE-IVIM had significantly higher image quality, less distortion and artifacts, and lower image contrast compared with EPI-IVIM (<i>P</i> < 0.05). The lesion-edge sharpness and diagnostic confidence of EPI-IVIM were lower than that of TSE-IVIM, although no significant differences existed (<i>P</i> > 0.05). The ADC and D of TSE-IVIM had better reproducibility (intraclass correlation coefficient > 0.9). Although no significant difference existed for the ADC and IVIM-derived parameters of lesions between the two sequences (<i>P</i> > 0.05), wide limits of agreement were found in the Bland-Altman plots.</p><p><strong>Conclusion: </strong>TSE-IVIM could be used as an alternative technique to EPI-IVIM for patients with oral cancer because of its better image quality. Furthermore, TSE-IVIM can provide more accurate quantitative parameters. However, the quantitative parameters derived from the two IVIM techniques cannot be used as equivalent parameters for patients with oral cancer.</p>","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679566/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9246646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Challenges associated with percutaneous nephrostomy in infants.","authors":"Iraklis-Georgios Kagias,&nbsp;Panagiotis Nikolinakos,&nbsp;Chloe Mortensen,&nbsp;Joseph M Norris","doi":"10.4274/dir.2023.232507","DOIUrl":"https://doi.org/10.4274/dir.2023.232507","url":null,"abstract":"","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71479285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Utility of intra-procedural cone-beam computed tomography imaging for the determination of the artery of Adamkiewicz suspected by angiography during transarterial embolization for hemoptysis.","authors":"Qingmeng Zhang, Jijun Li, Guanghui He, Jun Tang, Guodong Zhang","doi":"10.4274/dir.2022.221646","DOIUrl":"10.4274/dir.2022.221646","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the role of cone-beam computed tomography (CT) performed for the determination of the artery of Adamkiewicz (AKA) suspected by angiography during trans-catheter bronchial artery embolization for hemoptysis.</p><p><strong>Methods: </strong>In this retrospective study, 17 patients with hemoptysis who underwent cone-beam CT for evaluation of the AKA prior to arterial embolization from December 2014 to March 2022 were included. During the angiographic session, two interventional radiologists selected the possible AKAs that were defined as obscured hairpin-curved vessels arising from the dorsal branch of the intercostal arteries and running towards the midline in the arterially enhanced phase. Contrast-enhanced cone-beam CT was performed as an adjunct to angiography to determine whether the indefinite AKA was a real AKA based on whether it was found to connect to the anterior spinal artery.</p><p><strong>Results: </strong>Selective cone-beam CT was performed at 17 possible AKAs detected by selective arteriogram of the intercostal artery (ICA). Cone-beam CT allowed for the determination of AKAs in 16 cases (94.1%). As a result of cone-beam CT findings, 9 of 16 study arteries (56.3%) were judged as definite AKAs, and the remaining 7 (43.7%) were judged as definitely not AKAs but as the musculocutaneous branching from the dorsal branch of the ICA. In 1 of 17 cases (5.9%), cone-beam CT could not determine the AKA because of poor image quality caused by inadequate breath holding. An additional anterior radiculomedullary artery arising from the dorsal branch of the lower ICA because of the inflow of the contrast medium through the anastomosis was detected in one case by conebeam CT but not by angiography.</p><p><strong>Conclusion: </strong>Intraprocedural enhanced cone-beam CT performed as an adjunctive technique to angiography is sufficient for confident determination of the AKA, which is essential for the operators to perform accurate and safe arterial embolization for hemoptysis.</p>","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679543/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10212946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep learning reconstruction for brain diffusion-weighted imaging: efficacy for image quality improvement, apparent diffusion coefficient assessment, and intravoxel incoherent motion evaluation in <i>in vitro</i> and <i>in vivo</i> studies","authors":"Satomu Hanamatsu, Kazuhiro Murayama, Yoshiharu Ohno, Kaori Yamamoto, Masao Yui, Hiroshi Toyama","doi":"10.4274/dir.2023.232149","DOIUrl":"10.4274/dir.2023.232149","url":null,"abstract":"<p><strong>Purpose: </strong>Deep learning reconstruction (DLR) to improve imaging quality has already been introduced, but no studies have evaluated the effect of DLR on diffusion-weighted imaging (DWI) or intravoxel incoherent motion (IVIM) in <i>in vitro</i> or <i>in vivo</i> studies. The purpose of this study was to determine the effect of DLR for magnetic resonance imaging (MRI) in terms of image quality improvement, apparent diffusion coefficient (ADC) assessment, and IVIM index evaluation on DWI through <i>in vitro</i> and <i>in vivo</i> studies.</p><p><strong>Methods: </strong>For the <i>in vitro</i> study, a phantom recommended by the Quantitative Imaging Biomarkers Alliance was scanned and reconstructed with and without DLR, and 15 patients with brain tumors with normal-appearing gray and white matter examined using IVIM and reconstructed with and without DLR were included in the <i>in vivo</i> study. The ADCs of all phantoms for DWI with and without DLR, as well as the coefficient of variation percentage (CV%), and ADCs and IVIM indexes for each participant, were evaluated based on DWI with and without DLR by means of region-of-interest measurements. For the <i>in vitro</i> study, using the mean ADCs for all phantoms, a t-test was adopted to compare DWI with and without DLR. For the <i>in vivo</i> study, a Wilcoxon signed-rank test was used to compare the CV% between the two types of DWI. In addition, the Wilcoxon signed-rank test was used to compare the ADC, true diffusion coefficient (<i>D</i>), pseudodiffusion coefficient (<i>D*</i>), and percentage of water molecules in micro perfusion within 1 voxel (<i>f</i>) with and without DLR; the limits of agreement of each parameter were determined through a Bland-Altman analysis.</p><p><strong>Results: </strong>The <i>in vitro</i> study identified no significant differences between the ADC values for DWI with and without DLR (<i>P</i> > 0.05), and the CV% was significantly different for DWI with and without DLR (<i>P</i> < 0.05) when <i>b</i> values ≥250 s/mm² were used. The <i>in vivo</i> study revealed that <i>D*</i> and <i>f</i> with and without DLR were significantly different (<i>P</i> < 0.001). The limits of agreement of the ADC, <i>D</i>, and <i>D*</i> values for DWI with and without DLR were determined as 0.00 ± 0.51 × 10^-3, 0.00 ± 0.06 × 10^-3, and 1.13 ± 4.04 × 10-3 mm²/s, respectively. The limits of agreement of the f values for DWI with and without DLR were determined as -0.01 ± 0.07.</p><p><strong>Conclusion: </strong>Deep learning reconstruction for MRI has the potential to significantly improve DWI quality at higher <i>b</i> values. It has some effect on <i>D*</i> and f values in the IVIM index evaluation, but ADC and <i>D</i> values are less affected by DLR.</p>","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679550/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10215643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Field-of-view optimized and constrained undistorted single-shot study of intravoxel incoherent motion and diffusion-weighted imaging of the uterus during the menstrual cycle: a prospective study.","authors":"Xiaodan Li, Tianzhu Liu, Jun Chen, Jiahui Tang, Wanchun Zhang, Juan Du, Lina Li, Lesheng Huang","doi":"10.4274/dir.2023.232188","DOIUrl":"10.4274/dir.2023.232188","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to compare the variability of the uterus during the menses phase (MP), follicular phase (FP), and luteal phase (LP) of the menstrual cycle using intravoxel incoherent motion diffusion-weighted imaging (IVIM-DWI).</p><p><strong>Methods: </strong>This prospective study was conducted at the Guangdong Provincial Hospital of Traditional Chinese Medicine between January 2022 and January 2023. Women of childbearing age (18-45 years) with appropriate progesterone levels were included in this study. Conventional magnetic resonance imaging and IVIM-DWI scans were performed during the MP, FP, and LP. The differences in IVIM-DWI-derived parameters between these phases were then compared, and the overlap was quantitatively described.</p><p><strong>Results: </strong>The apparent diffusion coefficient (ADC) and pure molecular diffusion coefficient (<i>D</i>) values from the endometrium, uterine junctional zone (UJZ), and myometrium indicated statistical differences between the MP and FP and the MP and LP (ADC: endometrium, both <i>P</i> < 0.001; UJZ, <i>P</i> = 0.008 and <i>P</i> < 0.001, respectively; myometrium, <i>P</i> = 0.033 and <i>P</i> = 0.006, respectively; D: endometrium, both <i>P</i> < 0.001; UJZ, <i>P</i> = 0.008 and <i>P</i> = 0.006, respectively; myometrium, <i>P</i> = 0.041 and <i>P</i> = 0.045, respectively). The perfusion-related diffusion coefficient (<i>D*</i>) values from the myometrium indicated statistical differences between the FP and MP and the FP and LP (<i>D*</i>: myometrium, <i>P</i> = 0.049 and <i>P</i> = 0.009, respectively). The overlapping endometrium ratios between the MP and FP or LP were lower than 50% in the ADC and <i>D</i> values (ADC: overlapping of MP and FP: 33.33%, overlapping of MP and LP: 23.33%; <i>D</i>: overlapping of MP and FP: 40.00%, overlapping of MP and LP: 43.33%).</p><p><strong>Conclusion: </strong>The ADC and IVIM-derived parameters indicated differences in the uterus in diverse phases of the menstrual cycle, especially in the endometrium in relation to ADC and <i>D</i> values.</p>","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679544/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10215645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of post-pyloric Dobhoff tube retention during gastrojejunostomy for reduction of fluoroscopic time and radiation dose.","authors":"Tyler S Thompson, Coulter N Small, Hugh Davis, Michael Lazarowicz, Jeffrey Vogel, Robert E Heithaus","doi":"10.4274/dir.2022.221473","DOIUrl":"10.4274/dir.2022.221473","url":null,"abstract":"<p><p>The purpose of this study was to determine whether retention of a post-pyloric Dobhoff tube (DHT) in position to serve as a visual guide through the pylorus during gastrojejunostomy (GJ) tube placement results in a reduction in fluoroscopy time, procedure time, and estimated radiation dose. A retrospective study evaluated patients who underwent GJ tube placement or gastric to GJ conversion from January 1, 2017, to April 1, 2021. Demographic and procedural data were collected, and results were evaluated using descriptive statistics and hypothesis testing through an unpaired Student's t-test. Of the 71 GJ tube placements included for analysis, 12 patients underwent placement with a post-pyloric DHT in position, and 59 patients underwent placement without a post-pyloric DHT in position. The mean fluoroscopy time and estimated radiation dose were significantly reduced in patients who underwent GJ tube placement with a post-pyloric DHT in position compared with those without (7.08 min vs. 11.02 min, <i>P</i> = 0.004; 123.12 mGy vs. 255.19 mGy, <i>P</i> = 0.015, respectively). The mean total procedure time was also reduced in patients who underwent GJ tube placement with a post-pyloric DHT in position compared with those who had no post-pyloric DHT, but this finding lacked statistical significance (18.55 min vs. 23.15 min; <i>P</i> = 0.09). Post-pyloric DHT retention can be utilized during GJ tube placement to reduce radiation exposure to both the patient and interventionalist.</p>","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679547/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10212948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Can left ventricular entropy by cardiac magnetic resonance late gadolinium enhancement be a prognostic predictor in patients with left ventricular non-compaction?","authors":"Yun-Ting Ma, Lu-Jing Wang, Xiao-Ying Zhao, Yue Zheng, Li-Hui Sha, Xin-Xiang Zhao","doi":"10.4274/dir.2023.221859","DOIUrl":"10.4274/dir.2023.221859","url":null,"abstract":"<p><strong>Purpose: </strong>Left ventricular non-compaction (LVNC) is considered rare; however, the use of cardiac magnetic resonance (CMR) has shown that its incidence is not uncommon, and its clinical presentation remains variable, with an uncertain prognosis. Risk stratification of major adverse cardiac events (MACE) in patients with LVNC remains complex. Therefore, this study aims to determine whether tissue heterogeneity from late gadolinium enhancement-derived entropy is associated with MACE in patients with LVNC.</p><p><strong>Methods: </strong>This study was registered in the Clinical Trial Registry (CTR2200062045). Consecutive patients who underwent CMR imaging and were diagnosed with LVNC were followed up for MACE, which was defined by heart failure, arrhythmias, systemic embolism, and cardiac death. The patients were divided into MACE and non-MACE groups. The CMR parameters included left ventricular (LV) entropy, LV ejection fraction (LVEF), LV end-diastolic volume, LV end-systolic volume (LVESV), and LV mass (LVM).</p><p><strong>Results: </strong>Eighty-six patients (age: 45.48 ± 16.64 years; female: 62.7%; LVEF: 42.58 ± 17.20%) were followed up for a median of 18 months and experienced 30 MACE events (34.9%). The MACE group showed higher LV entropy, LVESV, and LVM and lower LVEF than the non-MACE group. LV entropy [hazard ratio (HR): 1.710, 95% confidence interval (CI): 1.078-2.714, <i>P</i> = 0.023] and LVEF (HR: 0.961, 95% CI: 0.936-0.988, <i>P</i> = 0.004) were independent predictors of MACE (<i>P</i> <0.050) according to the Cox regression analysis. Receiver operating characteristic curve analysis revealed that the area under the curve of LV entropy was 0.789 (95% CI: 0.687-0.869, <i>P</i> < 0.001), LVEF was 0.804 (95% CI: 0.699-0.878, <i>P</i> < 0.001), and the combined model of LV entropy and LVEF was 0.845 (95% CI: 0.751-0.914, <i>P</i> < 0.050).</p><p><strong>Conclusion: </strong>LGE-derived LV entropy and LVEF are independent risk indicators of MACE in patients with LVNC. The combination of the two factors was more conducive to improving the prediction of MACE.</p>","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679546/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10212950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of shear-wave elastography to distinguish complex and complicated fibroadenomas from simple fibroadenomas.","authors":"Işıl Başara Akın, Hakan Özgül, Canan Altay, Mustafa Seçil, Merih Güray Durak, Duygu Gürel, Pınar Balcı","doi":"10.4274/dir.2022.221615","DOIUrl":"10.4274/dir.2022.221615","url":null,"abstract":"<p><strong>Purpose: </strong>Simple fibroadenomas (SFAs), complex fibroadenomas (CFAs), and cellular fibroadenomas (CeFAs) are variants of fibroadenomas. Additionally, some degenerative, hyperplastic, and metaplastic changes may occur in fibroadenomas, forming complicated fibroadenomas. Distinctive ultrasonography (US) features in variants of fibroadenomas and complicated fibroadenomas have not been reported. Shear-wave elastography (SWE) can be applied to effectively discriminate between these variants and complicated fibroadenomas. In this study, we aimed to evaluate SWE findings to discriminate between SFAs and other variants.</p><p><strong>Methods: </strong>In total, 48 patients (26 with SFAs, 16 with CFAs, 3 with CeFAs, and 3 with complicated fibroadenomas) participated in this study. The lesions were classified into two groups according to histopathologic diagnoses. The SWE evaluation and lesion elasticity scores (E_max, E_mean, and E_min) were both assessed in m/s and k/Pa, respectively. Two observers measured E_max, E_mean, and E_min. Brightness (B)-mode US findings based on the Breast Imaging Reporting and Data System categorization and elasticity scores were recorded. In the statistical analyses, the chi-square test and non-parametric tests were performed. Fisher's exact test was used to compare independent groups, and Spearman's correlation coefficients were used to correlate the SWE data between the two observers. Additionally, receiver operating characteristic curves were analyzed to evaluate the diagnostic performance of the elasticity values.</p><p><strong>Results: </strong>The B-mode US features in both groups showed no statistical significance. The set of SWE values of both observers demonstrated strong statistical significance in discriminating between group 1 (SFAs) and Group 2 (CFAs, CeFAs, and complicated fibroadenomas).</p><p><strong>Conclusion: </strong>As the fibroadenoma variants and complicated fibroadenomas have similar US findings, SWE in addition to a conventional B-mode examination can increase the diagnostic performance to discriminate SFAs from other complex and complicated forms of fibroadenomas.</p>","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679553/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10212949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Artifact characterization of Nitinol needles in magnetic resonance imaging-guided musculoskeletal interventions at 3.0 tesla: a phantom study.","authors":"Vanessa Franziska Schmidt, Olaf Dietrich, Max Seidensticker, Moritz Wildgruber, Bernd Erber, Jens Ricke, Sophia Samira Goller","doi":"10.4274/dir.2023.232262","DOIUrl":"10.4274/dir.2023.232262","url":null,"abstract":"<p><strong>Purpose: </strong>To characterize the artifacts of an 18-gauge coaxial nickel-titanium needle using a balanced steady-state free precession sequence in magnetic resonance imaging-guided interventions at 3.0 tesla.</p><p><strong>Methods: </strong>The influence of flip angle (FA), bandwidth, matrix, slice thickness (ST), and read-out direction on needle artifact behavior was investigated for different intervention angles (IA). Artifact diameters were rated at predefined positions. Subgroup differences were assessed using Bonferroni-corrected non-parametric tests and correlations between continuous variables were expressed using the Bravais-Pearson coefficient. Interrater reliability was quantified using intraclass correlation coefficients (ICCs), and a contrast-enhanced target lesion to non-enhanced muscle tissue contrast ratio was quantified.</p><p><strong>Results: </strong>The artifact diameters decreased with an increase in FA for all IAs (<i>P</i> < 0.001) and with an increase in ST for IAs of 45°-90° (all P < 0.05). Tip artifacts occurred at low IAs (0°-45°) and gradually increased in size with a decrease in IA (<i>P</i> = 0.022). The interrater reliability was high (ICC: 0.994-0.999). The contrast-enhanced target lesion to non-enhanced muscle tissue contrast ratio presented positive correlations with increasing FAs and matrices (<i>P</i> < 0.001; <i>P</i> = 0.003) and a negative correlation with increasing STs (<i>P</i> = 0.007).</p><p><strong>Conclusion: </strong>To minimize needle artifacts, it is recommended to use FAs of 40°-60°, a ST of >7 mm, and, if possible, an IA of 45°-60°. The visibility of the target lesion and the needle's artifact behavior must be weighed up against each other when choosing the ST, while higher FAs (40°-60°) and matrices (224 × 224/256 × 256) are associated with low artifacts and sufficient lesion visibility.</p>","PeriodicalId":11341,"journal":{"name":"Diagnostic and interventional radiology","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2023-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10679549/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10215673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}