Acta radiologica open最新文献_第7页

Brown tumor mimicking metastases-the late manifestation of hyperparathyroidism. 模拟转移的棕色肿瘤-甲状旁腺功能亢进的晚期表现。

Acta radiologica open Pub Date : 2022-09-17 eCollection Date: 2022-09-01 DOI: 10.1177/20584601221128415

Louise Tram, Magdalena Kubik, Kristina Kvist Jensen, Charlotte E Almasi

引用次数: 0

Tunneled hemodialysis catheter insertion: Above, within, or below the right atrium-Where is the tip? 隧道式血液透析导管置入:右心房上方、内部或下方——导管尖端在哪里?

Acta radiologica open Pub Date : 2022-09-01 DOI: 10.1177/20584601221122421

Jonas Auer, Joachim Braun, Julian Lenk, Johannes Gollrad, Sa-Ra Ro, Bernd Hamm, Maximilian de Bucourt

{"title":"Tunneled hemodialysis catheter insertion: Above, within, or below the right atrium-Where is the tip?","authors":"Jonas Auer, Joachim Braun, Julian Lenk, Johannes Gollrad, Sa-Ra Ro, Bernd Hamm, Maximilian de Bucourt","doi":"10.1177/20584601221122421","DOIUrl":"https://doi.org/10.1177/20584601221122421","url":null,"abstract":"Background: One major challenge when inserting a tunneled, cuffed central venous catheter (CVC) for hemodialysis under fluoroscopy is to accurately place the catheter tip by assessing its position in relation to the cardiac silhouette to approximate the right atrium (RA).Purpose: To investigate whether a weighted mean calculated from published results for two two-dimensional landmark reference distances may be useful in assessing CVC tip positions in relation to the RA.Material and methods: Central venous catheter tip positions attained under fluoroscopic imaging during insertion using the cardiac silhouette as approximation were retrospectively related to two reference distances (carina to cranial RA border and craniocaudal RA extent), which were used to group catheter tip locations above (1), within (2), or below (3) the RA (henceforth referred to as landmark technique approximation, LTA). The LTA-derived catheter tip locations were validated by correlation with postinterventional computed tomography (CT) datasets acquired shortly after implantation (if available).Results: Based on LTA, 45 catheter tips (10.6%) were above, 179 (42.2%) within, and 200 (47.2%) below the RA. Postinterventional CT (n = 57; 13.4%) visualized 26.3% above, 66.7% within, and 7.0% below the RA.Conclusion: The LTA reference distances appear to lead to a rather low categorization of the CVC tips, or the tips have been placed rather low in the study population. Validation using postinterventional CT indicated an underestimation of the RA in the LTA. Patient characteristics with a higher risk of false estimation through LTA have been defined.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a5/bd/10.1177_20584601221122421.PMC9483979.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9318100","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Radioactive seed localization of foreign body. 放射性种子定位异物。

Acta radiologica open Pub Date : 2022-08-16 eCollection Date: 2022-08-01 DOI: 10.1177/20584601221088922

Sine Hylenius, Wei Uldall, Gro Qvamme, Niels Kroman

引用次数: 1

Evaluation of exposure factors of dual-energy contrast-enhanced mammography to optimize radiation dose with improved image quality. 评价双能增强乳房x线造影的暴露因素以优化辐射剂量和改善图像质量。

Acta radiologica open Pub Date : 2022-08-11 eCollection Date: 2022-08-01 DOI: 10.1177/20584601221117251

Sachila Niroshani, Tokiko Nakamura, Nikaidou Michiru, Toru Negishi

{"title":"Evaluation of exposure factors of dual-energy contrast-enhanced mammography to optimize radiation dose with improved image quality.","authors":"Sachila Niroshani, Tokiko Nakamura, Nikaidou Michiru, Toru Negishi","doi":"10.1177/20584601221117251","DOIUrl":"https://doi.org/10.1177/20584601221117251","url":null,"abstract":"Background: Dual-energy contrast-enhanced mammography (DECEM) is an advanced breast imaging technique of digital mammography.Purpose: To assess the total radiation dose received from complete DECEM using different combinations of exposure parameters for low- and high-energy images.Materials and methods: A dedicated phantom with three different concentrations of iodine inserts was used. Each iodine insert was 10 mm in diameter and concentration of 1.0 mgI/cm3, 2.0 mgI/cm3, and 4.0 mgI/cm3. The phantom was exposed at varying kVp levels. Mean glandular dose (MGD) was estimated. Contrast to noise ratio (CNR) and figure of merit (FOM) of the iodine inserts were used to assess the image quality.Results: The optimum CNR of the recombined images was obtained by using 28 kVp + 49 kVp tube voltage combination for 50 mm thickness, 50% fibroglandular phantom only with a 26% dose increase compared to the highest voltages (32 kVp + 49 kVp) that can be used for low energy (LE) and high energy (HE) imaging. The CNR value was increased with increasing iodine concentration (R 2 > 0.99).Conclusion: The use of as low as possible tube voltage for the LE imaging of standard 50% fibroglandular-50% adipose, 50 mm thickness breast while using the highest tube voltage for HE imaging has reduced the MGD while keeping optimum image quality.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/de/6a/10.1177_20584601221117251.PMC9379970.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40638209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Observer performance evaluation of the feasibility of a deep learning model to detect cardiomegaly on chest radiographs. 在胸片上检测心脏肿大的深度学习模型可行性的观察者性能评估。

Acta radiologica open Pub Date : 2022-07-21 eCollection Date: 2022-07-01 DOI: 10.1177/20584601221107345

Pranav Ajmera, Amit Kharat, Tanveer Gupte, Richa Pant, Viraj Kulkarni, Vinay Duddalwar, Purnachandra Lamghare

{"title":"Observer performance evaluation of the feasibility of a deep learning model to detect cardiomegaly on chest radiographs.","authors":"Pranav Ajmera, Amit Kharat, Tanveer Gupte, Richa Pant, Viraj Kulkarni, Vinay Duddalwar, Purnachandra Lamghare","doi":"10.1177/20584601221107345","DOIUrl":"https://doi.org/10.1177/20584601221107345","url":null,"abstract":"Background: Cardiothoracic ratio (CTR) is the ratio of the diameter of the heart to the diameter of the thorax. An abnormal CTR (>0.55) is often an indicator of an underlying pathological condition. The accurate prediction of an abnormal CTR chest X-rays (CXRs) aids in the early diagnosis of clinical conditions.Purpose: We propose a deep learning (DL)-based model for automatic CTR calculation to assist radiologists with rapid diagnosis of cardiomegaly and thus optimise the radiology flow.Material and methods: The study population included 1012 posteroanterior CXRs from a single institution. The Attention U-Net DL architecture was used for the automatic calculation of CTR. An observer performance test was conducted to assess the radiologist's performance in diagnosing cardiomegaly with and without artificial intelligence assistance.Results: U-Net model exhibited a sensitivity of 0.80 [95% CI: 0.75, 0.85], specificity >99%, precision of 0.99 [95% CI: 0.98, 1], and a F1 score of 0.88 [95% CI: 0.85, 0.91]. Furthermore, the sensitivity of the reviewing radiologist in identifying cardiomegaly increased from 40.50% to 88.4% when aided by the AI-generated CTR.Conclusion: Our segmentation-based AI model demonstrated high specificity (>99%) and sensitivity (80%) for CTR calculation. The performance of the radiologist on the observer performance test improved significantly with provision of AI assistance. A DL-based segmentation model for rapid quantification of CTR can therefore have significant potential to be used in clinical workflows by reducing radiologists' burden and alerting to an abnormal enlarged heart early on.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/40/b4/10.1177_20584601221107345.PMC9309780.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40663632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Comparison of the axillary lymph node between rheumatoid arthritis and psoriatic arthritis with computed tomography. 类风湿关节炎与银屑病关节炎腋窝淋巴结的ct比较。

Acta radiologica open Pub Date : 2022-07-13 eCollection Date: 2022-07-01 DOI: 10.1177/20584601221112616

Takeshi Fukuda, Reina Kayama, Sho Ogiwara, Takenori Yonenaga, Hiroya Ojiri

{"title":"Comparison of the axillary lymph node between rheumatoid arthritis and psoriatic arthritis with computed tomography.","authors":"Takeshi Fukuda, Reina Kayama, Sho Ogiwara, Takenori Yonenaga, Hiroya Ojiri","doi":"10.1177/20584601221112616","DOIUrl":"https://doi.org/10.1177/20584601221112616","url":null,"abstract":"Backgrounds: There is a lack of universally available biomarker to differentiate rheumatoid arthritis (RA) and psoriatic arthritis (PsA).Purpose: to see if the size of the axillary lymphnodes (ALNs) and the frequency of lymphadenopathy are useful biomarker to differentiate RA and PsA.Material and methods: Forty RA and 19 PsA patients without previous biologics usage were retrospectively included. Chest CT was assessed for the presence of lymphadenopathy and the size of the largest ALN. Frequency of lymphadenopathies was statistically compared between RA and PsA. The short axis and the long axis of the largest ALN were also compared and receiver operating characteristic (ROC) curve analysis was performed.Results: Frequency of axillary lymphadenopathy was significantly higher in RA than in PsA (80% vs 31.6%, p < .001). Number of lymphadenopathies in each patient was also significantly higher in RA than in PsA (3.0 vs 1.2 per patient, p = .005). Sensitivity and specificity for differentiating RA from PsA by the presence of at least one axillary lymphadenopathy were 0.8 and 0.68, respectively.The short axis of the largest ALNs in RA was significantly longer than in PsA (6.5 ± 1.6 mm vs 4.7 ± 1.7 mm, p < .001). ROC curve analysis of the short axis showed AUC of 0.75 (p = .002) and the cutoff value of 5.1 mm with a sensitivity of 0.83 and specificity of 0.74, when differentiating RA and PsA.Conclusion: Presence of ALN lymphadenopathy and the short axis of the largest ALN may have a potential utility in differentiating RA and PsA.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/37/59/10.1177_20584601221112616.PMC9284224.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40600214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

"GatorSign" for severe lumbar spinal canal stenosis: Magnetic resonance imaging evidence of lumbar perineural edema in the central canal. 严重腰椎管狭窄的“GatorSign”:中央椎管中腰椎神经周围水肿的磁共振成像证据。

Acta radiologica open Pub Date : 2022-07-05 eCollection Date: 2022-07-01 DOI: 10.1177/20584601221112615

Dharam Persaud-Sharma, Ashlyn Mason, Sanjeev Kumar

引用次数: 0

A rare case of metastatic atypical meningioma that highlights the shortcomings of treatment options at present. 一例罕见的转移性非典型脑膜瘤，突出了目前治疗方案的缺点。

Acta radiologica open Pub Date : 2022-07-05 eCollection Date: 2022-07-01 DOI: 10.1177/20584601221109891

Erik Kristian Maurice Wrange, Stefan Markus Walbom Harders

{"title":"A rare case of metastatic atypical meningioma that highlights the shortcomings of treatment options at present.","authors":"Erik Kristian Maurice Wrange, Stefan Markus Walbom Harders","doi":"10.1177/20584601221109891","DOIUrl":"https://doi.org/10.1177/20584601221109891","url":null,"abstract":"We report a case of a locally invasive recurrent atypical meningioma in the temporal region with late onset of meningioma lung metastasis. The patient was diagnosed in early adolescence with an atypical meningioma believed to be radiotherapy induced following treatment of a benign pilocytic astrocytoma in the hypothalamus region at 6 years of age. Even though the patient underwent several surgical and radiotherapy treatments, the intracranial meningioma kept growing and was locally invasive. The patient received experimental treatment with bevacizumab, a vascular endothelial growth factor A (VEGF-A)-inhibitor, for 4 years from age 26. Treatment was withdrawn after proven tumor growth on routine control MRI. A DOTA-TOC PET-CT-scan was performed to evaluate the DOTA-TOC somatostatin receptor number for possible SSTR (somatostatin receptor targeted therapy). In the included scan plan multiple lung metastasis were detected and later verified. Genomic tumor sequencing was performed, but no targeted treatment options were found. Instead, the patient finally, as the last treatment option, underwent 4 series of SSTR-targeted therapy (Lutetium DOTA-TOC). Unfortunately, the intracranial tumor component significantly progressed during the final stages of the treatment and the patient died less than a year after treatment was withdrawn at age 32. This case story illustrates the shortcomings of atypical/anaplastic meningioma treatment strategies at present and highlights the possibility of extracranial metastasis.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/1a/5d/10.1177_20584601221109891.PMC9272056.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40520829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Embolization of parastomal and small bowel ectopic varices utilizing a transhepatic antegrade approach: A case series. 经肝顺行入路栓塞造口旁和小肠异位静脉曲张:一个病例系列。

Acta radiologica open Pub Date : 2022-07-05 eCollection Date: 2022-07-01 DOI: 10.1177/20584601221112618

Ibrahim Mohammad Nadeem, Zain Badar, Victoria Giglio, Steffan Frosi Stella, George Markose, Sabarinath Nair

{"title":"Embolization of parastomal and small bowel ectopic varices utilizing a transhepatic antegrade approach: A case series.","authors":"Ibrahim Mohammad Nadeem, Zain Badar, Victoria Giglio, Steffan Frosi Stella, George Markose, Sabarinath Nair","doi":"10.1177/20584601221112618","DOIUrl":"https://doi.org/10.1177/20584601221112618","url":null,"abstract":"Background: The ideal approach to managing parastomal and small bowel ectopic varices (EVs) is yet to be established.Purpose: To evaluate outcomes following percutaneous antegrade transhepatic venous obliteration (PATVO) in patients presenting with bleeding from parastomal or small bowel EVs.Material and methods: A case series of 12 patients presenting with active or recurrent bleeding from parastomal or small bowel EVs who underwent 17 PATVO interventions at our tertiary care institution was performed. Data extraction from electronic medical records included baseline characteristics and procedural details. Endpoints included technical success, early clinical success, and re-bleeding.Results: Technical success was 100% (n = 17), and early clinical success was 82.3% (n = 14). No patient experienced any intra- or post-operative complications. Rebleed rates after initial PATVO in patients who achieved early clinical success was as follows: 3-month, 0% (n = 0); 6-month, 20% (n = 2); 12-month, 20% (n = 2). Rebleed rates after all PATVO procedures (including patients undergoing repeat procedures) that achieved early clinical success were as follows: 3-month, 0% (n = 0); 6-month, 14% (n = 2; 12-month, 14% (n = 2). All patients with re-bleeding required reintervention with either PATVO, transjugular intrahepatic portosystemic shunt (TIPS) or both.Conclusion: PATVO can be safely performed to treat bleeding from parastomal and small bowel EVs. In patients who present with recurrent bleeding despite PATVO, TIPS with/without embolization of bleeding varices remains a valid option as described by the literature.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9272059/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40504024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Mixed epithelial and stromal tumor of the kidney composed mainly of solid components: A case report. 以实性成分为主的肾脏混合性上皮和间质肿瘤1例。

Acta radiologica open Pub Date : 2022-07-01 eCollection Date: 2022-05-01 DOI: 10.1177/20584601221103019

Kiyoka Maeba, Akihiko Kanki, Hiroyuki Watanabe, Akira Yamamoto, Yasuto Fujimoto, Miyaji Yoshiyuki, Tsutomu Tamada

{"title":"Mixed epithelial and stromal tumor of the kidney composed mainly of solid components: A case report.","authors":"Kiyoka Maeba, Akihiko Kanki, Hiroyuki Watanabe, Akira Yamamoto, Yasuto Fujimoto, Miyaji Yoshiyuki, Tsutomu Tamada","doi":"10.1177/20584601221103019","DOIUrl":"https://doi.org/10.1177/20584601221103019","url":null,"abstract":"Mixed epithelial and stromal tumor (MEST) is a relatively rare lesion of mixed epithelial and mesenchymal origin, consisting of epithelial components that form cysts and stromal cells that are positive for estrogen and progesterone receptors. The present case was a 54-year-old female who presented with hematuria. Abdominal ultrasonography revealed a 41 x 30 mm tumor in the right kidney, with the tumor protruding outward in the direction of the renal pelvis. Dynamic contrast-enhanced computed tomography and magnetic resonance imaging confirmed a solid tumor in the right kidney that showed gradual contrast enhancement and contained a central non-enhancing area with the appearance of a cystic component. Based on the imaging findings, the provisional diagnosis was papillary renal cell carcinoma or angiomyolipoma with epithelial cysts. Right nephrectomy was performed and the tumor was confirmed histopathologically as MEST. We report a very rare case of MEST that was composed mainly of solid components.","PeriodicalId":72063,"journal":{"name":"Acta radiologica open","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/b2/c5/10.1177_20584601221103019.PMC9251983.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40567524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2