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European Journal of Radiology Open

Kuniharu Imai, Mitsuru Ikeda, Yoshiki Satoh, Keisuke Fujii, Chiyo Kawaura, Takuya Nishimoto, Masaki Mori
Purpose: To investigate the contrast enhancement in DSA images based on the X-ray absorption characteristics of iodinated contrast media. Methods: We have derived a new formula of predicting the pixel value ratio of two different contrast media and designate it as "Contrast Enhancement Ratio (CER)". In order to evaluate the accuracy of CER, we have evaluated the relationship between CER and pixel value ratio for all combinations of eleven iodinated contrast media...
2018: European Journal of Radiology Open
Andrea Borghesi, Silvia Michelini, Francesco Bertagna, Alessandra Scrimieri, Stefania Pezzotti, Roberto Maroldi
Persistent pure ground-glass nodules (pGGNs) typically show an indolent course with very slow growth rates. These slow-growing lesions exhibit different growth patterns regardless of their initial computed tomography (CT) features. Therefore, predicting the aggressive behavior of pGGNs on initial CT remains a diagnostic challenge. The literature reports that computerized analysis and various quantitative features have been tested to improve the risk stratification for pGGNs. The present article describes the long-term follow-up of two pGGNs with different behavior and introduces, for the first time, a new computerized method of analysis that could be helpful for predicting the future behavior of pGGNs...
2018: European Journal of Radiology Open
Yoshiya Watanabe, Hiroyuki Tokue, Ayako Taketomi-Takahashi, Yoshito Tsushima
Objective: To evaluate imaging findings and complications from transcatheter interventional treatment of hepatocellular carcinoma via the inferior phrenic arteries. Material & Methods: 40 procedures in 25 patients (19 men; age range, 57-89 years) were retrospectively reviewed in this study. In all procedures, a micro-catheter was selectively inserted in the right inferior phrenic artery (n = 39) or left inferior phrenic artery (n = 1), and transcatheter arterial chemoembolization (n = 39) or transcatheter arterial embolization (n = 1) was performed...
2018: European Journal of Radiology Open
Elina Stoffel, Anton S Becker, Moritz C Wurnig, Magda Marcon, Soleen Ghafoor, Nicole Berger, Andreas Boss
Purpose: To evaluate the accuracy of a deep learning software (DLS) in the discrimination between phyllodes tumors (PT) and fibroadenomas (FA). Methods: In this IRB-approved, retrospective, single-center study, we collected all ultrasound images of histologically secured PT (n = 11, 36 images) and a random control group with FA (n = 15, 50 images). The images were analyzed with a DLS designed for industrial grade image analysis, with 33 images withheld from training for validation purposes...
2018: European Journal of Radiology Open
Juliane Goebel, Felix Nensa, Haemi P Schemuth, Stefan Maderwald, Thomas Schlosser, Stephan Orzada, Stefan Rietsch, Harald H Quick, Kai Nassenstein
Introduction: This study examined the feasibility of aortic valve planimetry at 7 T ultrahigh field MRI in intraindividual comparison to 3 T and 1.5 T MRI. Material and methods: Aortic valves of eleven healthy volunteers (mean age, 26.4 years) were examined on a 7 T, 3 T, and 1.5 T MR system using FLASH and TrueFISP sequences. Two experienced radiologists evaluated overall image quality, the presence of artefacts, tissue contrast ratios, identifiability, and image details of the aortic valve opening area (AVOA)...
2018: European Journal of Radiology Open
Jae Heung Bae, Sang Yub Lee
Purpose: To assess the filter tilting and outcomes of the Celect and Denali inferior vena cava (IVC) filters by using a propensity score-matching analysis. Materials and methods: From January 2009 to November 2017, 181 Celect and 58 Denali filters were inserted in our institution. To assess filter tilt, filter tip abutment or penetration of the IVC wall, and retrieval outcome, independent variables, including age, sex, IVC long diameter, IVC angulation, and proximity of the filter to renal vein insertion, were entered in the propensity model...
2018: European Journal of Radiology Open
Eliseo Picchi, Francesca Di Giuliano, Donatella Ferrari, Chiara Adriana Pistolese, Francesco Garaci, Roberto Floris
No abstract text is available yet for this article.
2018: European Journal of Radiology Open
Bradley Aaron Cagle, Brenda L Holbert, Stephanie Wolanin, Rafel Tappouni, Neeraj Lalwani
Majority of malignant pancreatic neoplasms are epithelial in origin and mostly arise from exocrine gland. Ductal adenocarcinoma compromises the major histological type of such tumors. Primary non-epithelial tumors of exocrine pancreatic gland are extremely rare and incorporate lymphoma and sarcoma. Primary pancreatic lymphoma compromises less than 0.5% of pancreatic malignancies. Primary pancreatic lymphoma can be difficult to differentiate from pancreatic adenocarcinoma and other neoplasms on imaging, and a correct diagnosis is crucial for appropriate patient management...
2018: European Journal of Radiology Open
Lorenzo Faggioni, Michela Gabelloni, Sandra Accogli, Marco Angelillis, Giulia Costa, Paolo Spontoni, Anna Sonia Petronio, Davide Caramella
Mitral regurgitation is the most common valve disorder in the Western world, and although surgery is the established therapeutic gold standard, percutaneous transcatheter mitral interventions are gaining acceptance in selected patients who are inoperable or at an exceedingly high surgical risk. For such patients, multidetector computed tomography (MDCT) can provide a wealth of valuable morphological and functional information in the preoperative setting. Our aim is to give an overview of the MDCT image acquisition protocols, post-processing techniques, and imaging findings with which radiologists should be familiar to convey all relevant information to the Heart Team for successful treatment planning...
2018: European Journal of Radiology Open
Yuko Ogawa, Koichiro Abe, Akiko Sakoda, Hiromi Onizuka, Shuji Sakai
A 17-year-old female had been complaining of a headache for 6 years. She presented severe hypertension (200/138 mmHg) on admission. CT showed a hypervascular tumor behind the urinary bladder and a swelling of the right internal obturator node. Intense FDG uptakes were identified in the both lesions. High FDG accumulation was also observed in the brown adipose tissue (BAT) throughout the patient's body, and intense contrast enhancement was found in the BAT on CT. The diagnosis was a malignant paraganglioma with obturator node metastasis...
2018: European Journal of Radiology Open
Rok Dežman, Dragan Mašulović, Peter Popovič
Perivascular epithelioid cell tumor (PEComa) of liver is extremely rare hepatic neoplasm with only 30 cases reported in the literature. These lesions are found mainly in young females and may present a potential pitfall in the characterisation of focal liver lesions. The biological behavior of PEComa varies from generally benign to rarely malignant and metastatic disease. We report a case of a patient with hepatic PEComa with the corresponding imaging findings on the ultrasound, contrast-enhanced ultrasound (CEUS) and hepatospecific MRI...
2018: European Journal of Radiology Open
Jackrit Suthakorn, Narucha Tanaiutchawoot, Cholatip Wiratkapan, Songpol Ongwattanakul
Objective: This paper proposes the development of a breast biopsy navigation system with an assisted needle holder tool for a coaxial needle and a graphical user interface, which utilizes an optical tracking device to localize the needle position relative to the ultrasound image with the aim to improve performance especially for a new radiologist or an inexperienced group. Materials and methods: The system consists of an assisted needle holder tool, which as an attachment for the 2D ultrasound transducer and the graphical user interface (GUI) that shows the needle pathway, needle line and warning signs...
2018: European Journal of Radiology Open
R Schwarz, N M Bongers, C Hinterleitner, H Ditt, K Nikolaou, J Fritz, H Bösmüller, M Horger
Purpose: To compare the diagnostic performance of frequency-selective non-linear blending and conventional linear blending contrast-enhanced CT for the diagnosis of acute (AC) and gangrenous (GC) cholecystitis. Materials and methods: Following local ethics committee approval for retrospective data analysis, a database search derived 39 patients (26 men, mean age 67.8 ± 14.6 years) with clinical signs of acute cholecystitis, contrast enhanced CT (CECT) evaluation, cholecystectomy, and pathological examination of the resected specimen...
2018: European Journal of Radiology Open
Ferdinand Seith, Petros Martirosian, Konstantin Nikolaou, Christian la Fougère, Nina Schwenzer, Holger Schmidt
Objective: Aim of the study was to evaluate the influence of the selection of measured b-values on the precision of cDWI in the upper abdomen as well as on the lesion contrast of PET-positive liver metastases in cDWI and vcDWI. Methods: We performed a retrospective analysis of 10 patients (4 m, 63.5 ± 12.9 y/o) with PET-positive liver metastases examined in 3 T-PET/MRI with b = 100,600,800,1000 and 1500s/mm2 . cDWI (cb1000/cb1500) and vcDWI were computed based on following combinations: i) b = 100/600 s/mm2 , ii) b = 100/800 s/mm2 , iii) b = 100/1000s/mm2 , iv) b = 100/600/1000s/mm2 v) all measured b-values...
2018: European Journal of Radiology Open
S J Withey, J Gariani, K Reddy, D Prezzi, C Kelly-Morland, S Ilyas, A Adam, V Goh
Aims: Ablation therapies are an innovative nephron-sparing alternative to radical nephrectomy for early stage renal cancers, although determination of treatment success is challenging. We aimed to undertake a systematic review of the literature to determine whether assessment of tumour perfusion may improve response assessment or alter clinical management when compared to standard imaging. Material and Methods: Two radiologists performed independent primary literature searches for perfusion imaging in response assessment following ablative therapies (radiofrequency ablation and cryotherapy) focused on renal tumours...
2018: European Journal of Radiology Open
Hideyuki Sato, Shinichiro Fujimoto, Yosuke Kogure, Hiroyuki Daida
Purpose: While ultrasmall superparamagnetic iron oxide (USPIO) is useful for identifying atherosclerotic lesions as an MRI contrast medium, there are limitations in its power to quantitatively evaluate and resolve USPIO in atherosclerotic lesions of the heart. Computed tomography (CT) has a higher resolution than MRI, and Dual Energy CT is capable of visualizing iron atoms, the main component of USPIO. More recently, a new USPIO capable of achieving longer retention times in blood circulation compared to the previous USPIO has been developed...
2018: European Journal of Radiology Open
Ibrahim E Mohamed, Mona A Mohamed, Mohamed Yousef, Mustafa Z Mahmoud, Batil Alonazi
Purpose: To determine the causes of low vision among Sudanese patients with diabetic retinopathy (DR) by using ophthalmic B-scan ultrasonography. Materials and methods: A total of 100 patients with DR at different grades, were recruited prospectively between September 2016 and January 2018. Nidek (Echoscan US-4000) ultrasound unit was used to determine the causes of low vision in diabetic patients according to their glycated haemoglobin (HbA1c) and early treatment of diabetic retinopathy scale (ETDRS) severity levels...
2018: European Journal of Radiology Open
Jasmin Zvorničanin, Edita Zvorničanin
No abstract text is available yet for this article.
2018: European Journal of Radiology Open
Sang Yub Lee, Jongmin Lee
Objectives: To investigate risk factors for inferior vena cava (IVC) filter abutment, including external compression on the IVC wall, using venous phase computed tomography (CT). Methods: One-hundred-forty-one cases of Celect IVC filter insertion between January 2009 and April 2017 were retrospectively reviewed. On pre-procedural CT, IVC diameter and morphological classifications were measured. Filter tilt angle, IVC angle, vertical position, and filter tip abutment to the IVC wall were analyzed on post-procedural CT...
2018: European Journal of Radiology Open
Sahar M ElKhamary, Alicia Galindo-Ferreiro, Laila AlGhafri, Rajiv Khandekar, Silvana Artioli Schellini
Purpose: To evaluate if the apparent diffusion coefficient (ADC) value in diffusion-weighted magnetic resonance imaging (DW-MRI) improves the diagnostic accuracy of diffuse orbital masses. Materials and methods: ADC DW-MRI was used to evaluate cases of diffuse orbital masses at our institution from 2000 to 2015. Lesions were grouped according to histopathologic diagnosis as, benign, pre-malignant and malignant. Lymphoproliferative lesions were further subgrouped as lymphoma or other lymphoproliferative lesions...
2018: European Journal of Radiology Open
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