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Acta Radiologica Open

Anders Svensson, Torkel B Brismar
Runoff computed tomography angiography (CTA) is commonly used to diagnose peripheral artery disease (PAD) of the lower extremities. However, the risk of non-conclusive examination due to suboptimal timing and overrunning the contrast medium bolus is a major pitfall that must be considered. Here we describe two case studies using dynamic time-resolved CTA imaging of the peripheral vascularity.
January 2019: Acta Radiologica Open
Megumi Matsuda, Asako Yamamoto, Jun Sasahara, Hiroshi Oba, Shigeru Furui
Symptomatic calcification is an entity in which hydroxyapatite calcific deposits cause inflammation, then burst and dissolve into the surrounding structures. Although a well-known pathologic condition in the rotator cuff tendons, it can also occur in other structures of the locomotor system. Radiographs are usually taken at the initial examination but can also be useful for follow-up evaluation of the course of the calcified matter. Here, we present a case of symptomatic calcification of the lateral collateral ligament of the knee, in which movement of the calcified matter could be observed both by radiography and magnetic resonance imaging as correlated with the clinical symptoms...
December 2018: Acta Radiologica Open
Gabriel Lucca de Oliveira Salvador, Poliana Palma Barbieri, Laura Maschke, Anna Luisa Aranha Nunes, Maria Helena Louveira, Vinicius Milani Budel
Background: Image-guided charcoal injection in suspicious breast lesions for preoperative localization is a procedure that has been increasing over the years because it is safer, faster, and more affordable when compared to needle-wire preoperative localization. To date, no complications have been associated with the method. However, in recent years there have been some reports about charcoal granulomas mimicking malignant lesions in some postoperative patients or in a conservative follow-up...
December 2018: Acta Radiologica Open
Dolores Ferrara, Gianfranco Vallone, Enrico Tedeschi, Andrea Ponsiglione, Arnaldo Stanzione, Antonio Pisani, Massimo Imbriaco
Tuberous sclerosis (TS) is a relatively rare multi-organ disorder generally diagnosed in infancy and described as a clinical triad of sebaceous adenoma, mental retardation, and seizures. Angiomyolipoma (AML) is the most common benign renal tumor usually found incidentally as a solitary small echogenic lesion on grayscale ultrasound. Less commonly, it is part of the TS complex and is seen as multiple lesions in both kidneys. We describe an unusual case of TS incidentally diagnosed in a 37-year-old female patient with several and bilateral renal AMLs and a single cortical-subcortical tuber in the right parieto-occipital cerebral lobe...
December 2018: Acta Radiologica Open
Takuji Yamagami, Kenji Kajiwara, Tomoaki Yamanishi, Hiroki Minamiguchi, Rika Yoshimatsu
We report a 63-year-old woman who had recurrent symptoms such as remarkable abdominal distension caused by autosomal dominant polycystic kidney disease in spite of previous bilateral renal arterial embolization with microcoils. Renal arterial embolization with trisacryl gelatin microspheres was performed. The embolic agent was infused while the micro-balloon catheter that was coaxially inserted from a 4-F catheter was inflated without any complications. The size of the polycystic kidneys decreased and the symptoms were satisfactorily relieved...
December 2018: Acta Radiologica Open
Munetaka Machida, Keiko Toyoda, Megumi Matsuda, Kaoru Sumida, Asako Yamamoto, Keita Sakurai, Hiroshi Oba
Cerebral tuberculosis (TB) presents most frequently as meningitis in the basilar cistern; however, it can also manifest in various other ways, such as localized encephalitis, abscess, and tuberculoma. Here, focusing on imaging findings, we report an immunocompetent case who demonstrated multiple parenchymal lesions and was diagnosed with cerebral TB after testing positive on QuantiFERON (QTF); her clinical signs/symptoms and laboratory findings responded well to anti-TB medication therapy. The patient was a 60-year-old woman with the chief complaints of headache and consciousness disturbance...
December 2018: Acta Radiologica Open
Keishi Fujiwara, Ichiro Maeda, Hidefumi Mimura
Granular cell tumor (GCT) is a rare neoplasm of the soft tissues and <1% of all GCTs are malignant. Initially, GCT was considered a myogenic lesion affecting the female breast (myoblastoma). We report the case of an 83-year-old woman with a palpable lump in the left breast; mammography and ultrasound showed an irregular lesion. It was difficult to differentiate it from a malignant lesion; therefore, we performed core needle biopsy and histopathologic examination and immunohistochemical studies revealed a GCT of the breast...
December 2018: Acta Radiologica Open
Markus Fahlström, Samuel Fransson, Erik Blomquist, Tufve Nyholm, Elna-Marie Larsson
Background: Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is a promising perfusion method and may be useful in evaluating radiation-induced changes in normal-appearing brain tissue. Purpose: To assess whether radiotherapy induces changes in vascular permeability (Ktrans ) and the fractional volume of the extravascular extracellular space (Ve ) derived from DCE-MRI in normal-appearing brain tissue and possible relationships to radiation dose given...
November 2018: Acta Radiologica Open
Thet-Thet-Lwin, Akio Yoneyama, Motoki Imai, Hiroko Maruyama, Kazuyuki Hyodo, Tohoru Takeda
Spontaneously growing testicular seminoma in the aged rat was imaged by one of the most sensitive imaging modalities, namely, phase-contrast X-ray computed tomography (CT) with crystal X-ray interferometry. Phase-contrast X-ray CT clearly depicted the detailed inner structures of the tumor and provided 20× magnified images compared to light-microscopic images. Phase-contrast X-ray CT images are generated based on density variations in the object, whereas pathological images are based on differentiation of cellular structures, such as the cellular nuclei and cytoplasm...
September 2018: Acta Radiologica Open
Elias Vaattovaara, Marko Nikki, Mika Nevalainen, Mervi Ilmarinen, Osmo Tervonen
Background: In many emergency radiology units, most of the night-time work is performed by radiology residents. Residents' preliminary reports are typically reviewed by an attending radiologist. Accordingly, it is known that discrepancies in these preliminary reports exist. Purpose: To evaluate the quality of night-time computed tomography (CT) interpretations made by radiology residents in the emergency department. Material and Methods: Retrospectively, 1463 initial night-time CT interpretations given by a radiology resident were compared to the subspecialist's re-interpretation given the following weekday...
September 2018: Acta Radiologica Open
Johan Bohlin, Erik Dahlin, Julia Dreja, Bodil Roth, Olle Ekberg, Bodil Ohlsson
Background: Gastrointestinal symptoms and changes in colonic transit time (CTT) are common in the population. Purpose: To evaluate consecutive patients who had been examined for CTT, along with completion of a diary about laxative and drug use, lifestyle factors, and gastrointestinal symptoms, to identify possible associations with longer or prolonged CTT. Material and Methods: A total of 610 consecutive patients had undergone the radiopaque marker method with an abdominal X-ray for clinical purposes...
September 2018: Acta Radiologica Open
Tomohide Sanada, Jinho Park, Masaru Hagiwara, Norihiko Ikeda, Takeshi Nagai, Jun Matsubayashi, Kazuhiro Saito
Intrathoracic endometriosis is classified into pleurodiaphragmatic endometriosis and bronchopulmonary endometriosis. Bronchopulmonary endometriosis is rare. Computed tomography (CT) findings of bronchopulmonary endometriosis are lung nodules, with or without cavities, or surrounding ground-glass opacities. Features vary with menstrual status. Recently, the usefulness of magnetic resonance imaging (MRI) was reported for diagnosis of intrathoracic endometriosis, but most published reports were about pleurodiaphragmatic endometriosis...
September 2018: Acta Radiologica Open
Georg J Wengert, Thomas H Helbich, Panagiotis Kapetas, Pascal At Baltzer, Katja Pinker
Mammography, as the primary screening modality, has facilitated a substantial decrease in breast cancer-related mortality in the general population. However, the sensitivity of mammography for breast cancer detection is decreased in women with higher breast densities, which is an independent risk factor for breast cancer. With increasing public awareness of the implications of a high breast density, there is an increasing demand for supplemental screening in these patients. Yet, improvements in breast cancer detection with supplemental screening methods come at the expense of increased false-positives, recall rates, patient anxiety, and costs...
September 2018: Acta Radiologica Open
Bo Mussmann, Poul Erik Andersen, Trine Torfing, Søren Overgaard
Background: Measuring bone mineral density (BMD) around acetabular prosthetic components with computed tomography (CT) is challenged by the complex anatomy and metal artifacts. Three-dimensional (3D) segmentation is required for the analysis, but it is usually not practically applicable on current CT workstations. Purpose: To test the between-scan agreement and reliability of custom segmentation software for BMD measurements adjacent to cemented and uncemented acetabular cups in dual-energy CT (DECT)...
September 2018: Acta Radiologica Open
Thomas Kjeld, Tem S Jørgensen, Gitte Fornitz, Jan Roland, Henrik C Arendrup
Closure of persistent foramen ovale (PFO) to avoid cryptogenic strokes is performed globally with enthusiasm but lacks prove of efficacy. We present a 79-year-old man who had had a PFO device introduced nine years previously because of cryptogenic strokes presenting as syncopes. The patient was referred from his general practitioner with two new syncopes. Transthoracic echocardiography revealed no cardiac causes of embolism. Transesophageal echocardiography (TEE) revealed a misplaced device like an umbrella in a storm, but no septum defects...
September 2018: Acta Radiologica Open
Subba Rao Digumarthy, Rachel Vining, Azadeh Tabari, Sireesha Nandimandalam, Alexi Otrakji, JoAnne O Shepard, Mannudeep K Kalra
Background: Laterality errors in radiology reports can lead to serious errors in management. Purpose: To reduce errors related to side discrepancies in radiology reports from thoracic imaging by 50% over a six-month period with education and voice recognition software tools. Material and Methods: All radiology reports at the Thoracic Imaging Division from the fourth quarter of 2016 were reviewed manually for presence of side discrepancies (baseline data)...
July 2018: Acta Radiologica Open
Leena Lehti, Marcus Söderberg, Peter Höglund, Ulf Nyman, Anders Gottsäter, Johan Wassélius
Background: Computed tomographic angiography (CTA) may require a non-contrast enhanced dataset for the diagnostic workup. By using dual-energy acquisition, it is possible to obtain a virtual non-contrast-enhanced (VNC) dataset, thereby possibly eliminating the non-contrast acquisition and reducing the radiation dose. Purpose: To compare image quality of VNC images reconstructed from arterial phase dual-energy CTA to true non-contrast (TNC) images, and to assess whether VNC images were of sufficient quality to replace TNC images...
July 2018: Acta Radiologica Open
Roberto Vargas Paris, Mikael Skorpil, Eli Westerlund, Peter Lindholm, Sven Nyrén
Background: Magnetic resonance imaging (MRI) can be an alternative method to computed tomography angiography (CTA) for pulmonary embolism. Purpose: To evaluate the feasibility of diffusion-weighted imaging (DWI) detecting acute pulmonary embolism (PE) in free-breathing humans. Material and Methods: Twenty patients with PE verified by CTA and 20 controls were investigated with MRI (1.5 Aera, Siemens Healthcare). All sequences were performed in the transversal plane using free-breathing without gating...
June 2018: Acta Radiologica Open
Ludovico M Garau, Daniele Guerrieri, Flaminia De Cristofaro, Alice Bruscolini, Giuseppe Panzironi
Background: Current magnetic resonance imaging (MRI) techniques for measuring extraocular muscle (EOM) volume enlargement are not ideally suited for routine follow-up of Graves' ophthalmopathy (GO) because the difficulty of segmenting the muscles at the tendon insertion complicates and lengthens the study protocol. Purpose: To measure the EOM sampled volume (SV) and assess its correlation with proptosis. Material and Methods: A total of 37 patients with newly diagnosed GO underwent 3-T MRI scanning with iterative decomposition of water and fat (IDEAL) sequences with and without contrast enhancement...
June 2018: Acta Radiologica Open
Anders Svensson, Kerstin Cederlund, Torkel B Brismar, Raquel Themudo
Aortic subvalvular pseudoaneurysms (PSA) are particularly subjected to strain and shear stress forces from blood flow and therefore their size can vary along the heart cycle. Here we describe a case of an aortic subvalvular PSA that shows significant variation in size between systolic and diastolic phase during retrospective ECG-triggered cardiac computed tomography angiography.
June 2018: Acta Radiologica Open
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