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Acta Radiologica Open

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https://www.readbyqxmd.com/read/28989798/how-to-train-radiology-residents-to-diagnose-pulmonary-embolism-using-a-dedicated-mri-protocol
#1
Anna Nordgren Rogberg, Sven Nyrén, Eli Westerlund, Peter Lindholm
BACKGROUND: In recent years, magnetic resonance imaging (MRI) has been suggested as an alternative to computed tomography angiography (CTA) to diagnose pulmonary embolism (PE). In previous studies, only senior radiologists have been evaluated as reviewers. PURPOSE: To investigate if radiology residents can be trained to review MRI regarding PE and to determine the learning curve effects. MATERIAL AND METHODS: Four residents independently went through a training program consisting of 70 participants that had undergone steady-state free precession MRI...
September 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28959457/hemangioma-of-the-rib-showing-a-relatively-high-18f-fdg-uptake-a-case-report-with-a-literature-review
#2
Takahide Itabashi, Makoto Emori, Yoshinori Terashima, Tadashi Hasegawa, Junya Shimizu, Satoshi Nagoya, Toshihiko Yamashita
Hemangioma of the rib is a rare benign tumor that is often difficult to distinguish from malignant bone tumors. Rib hemangioma often shows bony disruption with a slight cortical disruption, extraosseous lesion, and expanded bone on computed tomography (CT). We report the case of a 68-year-old man with atypical rib hemangioma with a slight cortical disruption and no expanded bone. The tumor showed relatively high 18FDG-uptake on positron emission tomography (PET)/CT. Rib hemangioma often shows higher 18FDG-uptake...
September 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28959456/embolization-of-a-life-threatening-placenta-increta-hemorrhage-with-a-four-month-mri-follow-up
#3
Annika Bach, Anne Bartens, Gabriele Gossing, Bernhard Gebauer, Rolf W Günther, Christian Althoff
A 29-year-old woman with partial placenta increta was treated by bilateral uterine artery embolization (UAE) for bleeding with hemorrhagic shock two months after delivery, resulting in permanent hemostasis. The patient underwent a total of three magnetic resonance imaging (MRI) examinations-before UAE and four days and four months after UAE. At four months, MRI showed a fully regenerated uterus with preserved perfusion and complete resolution of residual placental tissue.
September 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28944082/ultra-short-echo-time-magnetic-resonance-imaging-for-detection-of-pulmonary-arteriovenous-malformation-recanalization-after-coil-embolization-a-case-report-and-a-phantom-study
#4
Kohei Hamamoto, Emiko Chiba, Katsuhiko Matsuura, Tomohisa Okochi, Keisuke Tanno, Osamu Tanaka
A pulmonary arteriovenous malformation (PAVM) is a direct connection between the pulmonary arteries and veins for which metallic coil transcatheter embolization is the standard of care. Detecting recanalization after PAVM treatment is crucial, but direct visualization with computed tomography or magnetic resonance imaging (MRI) is generally difficult. Here, we report a case of a recanalized PAVM that was directly detected with ultra-short echo time MRI. The detection of these signals in the coils was confirmed in a phantom study...
September 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28944081/renal-volumetry-with-magnetic-resonance-imaging
#5
Rolf H Christensen, Torbjörn Lundgren, Peter Stenvinkel, Torkel B Brismar
BACKGROUND: No gold standard exists for renal volumetry in vivo. PURPOSE: To devise and evaluate segmentation methods on magnetic resonance imaging (MRI) datasets. MATERIAL AND METHODS: Five combinations of MRI pulse sequences and measuring methods were used to measure the renal volumes of five men aged 54-72 years scanned before autologous renal stem cell transplantation and three, six, and 12 months post transplantation. RESULTS: Renal volume did not change after stem cell transplantation...
September 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28894592/changes-in-delta-adc-reflect-intracranial-pressure-changes-in-craniosynostosis
#6
Yuko Takahashi, Masaaki Hori, Kazuaki Shimoji, Masakazu Miyajima, Osamu Akiyama, Hajime Arai, Shigeki Aoki
BACKGROUND: In patients with craniosynostosis, intracranial pressure (ICP) has been reported to increase even in the absence of overt symptoms. The early and non-invasive detection of intracranial hypertension is important for reducing the risk of abnormal brain development in pediatric patients. PURPOSE: To assess whether the apparent diffusion coefficient (ADC) of white matter during the cardiac cycle (ΔADC) would change after surgery to relieve ICP in children with craniosynostosis...
September 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28894591/efficacy-of-oral-contrast-agents-for-upper-gastrointestinal-signal-suppression-in-mrcp-a-systematic-review-of-the-literature
#7
Anne Frisch, Thula C Walter, Bernd Hamm, Timm Denecke
BACKGROUND: Orally administered substances which suppress signals from gastrointestinal fluid can be used to enhance image quality in magnetic resonance cholangiopancreatography (MRCP). In daily practice, the available substances range from commercial products to regular viands such as fruit juices. PURPOSE: To provide an overview on the significance of and the substances used as gastrointestinal fluid signal suppressors in MRCP. MATERIAL AND METHODS: A systematic review of the existing literature was performed to evaluate the efficacy and efficiency of oral T2-signal suppressors in MRCP...
September 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28839951/spindle-cell-sclerosing-rhabdomyosarcoma-with-intracranial-invasion-without-destroying-the-bone-of-the-skull-base-a-case-report-and-literature-review
#8
Daichi Momosaka, Osamu Togao, Akio Hiwatashi, Koji Yamashita, Koji Yoshimoto, Megumu Mori, Toru Iwaki, Hiroshi Honda
Spindle cell/sclerosing rhabdomyosarcoma (ssRMS) is a new subtype of rhabdomyosarcoma included in the World Health Organization soft tissue and bone tumor classification in 2013. Despite the increasing number of reported cases of ssRMS, the imaging characteristics of ssRMS are not established. Herein, we present the case of an elderly Japanese woman with ssRMS of the masticator space with intracranial invasion without destruction of the adjacent bone. Attention should be paid to the presence of intracranial infiltration that may indicate a worse prognosis...
August 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28815058/testicular-microlithiasis-is-associated-with-ethnicity-and-socioeconomic-status
#9
Malene R Pedersen, Emily C Bartlett, Søren R Rafaelsen, Palle J Osther, Peter Vedsted, Maria E Sellars, Paul S Sidhu, Henrik Møller
BACKGROUND: There are limited studies about testicular microlithiasis (TML) and background information such as health, lifestyle, and socioeconomic status. PURPOSE: To assess the prevalence of TML in relation to socioeconomic status and ethnicity. MATERIAL AND METHODS: From a database of scrotal ultrasound examinations in a single institution, all men who underwent routine ultrasound examinations for a variety of symptoms from 1998 to 2015 were included...
August 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28811932/two-novel-direct-spio-labels-and-in%C3%A2-vivo-mri-detection-of-labeled-cells-after-acute-myocardial-infarct
#10
Riikka M Korpi, Kirsi Alestalo, Timo Ruuska, Eveliina Lammentausta, Ronald Borra, Fredrik Yannopoulos, Siri Lehtonen, Jarkko T Korpi, Elisa Lappi-Blanco, Vesa Anttila, Petri Lehenkari, Tatu Juvonen, Roberto Blanco Sequieros
BACKGROUND: Acute myocardial infarction (AMI) is a leading cause of morbidity and mortality worldwide. Cellular decay due hypoxia requires rapid and validated methods for possible therapeutic cell transplantation. PURPOSE: To develop direct and rapid superparamagnetic iron oxide (SPIO) cell label for a large-animal model and to assess in vivo cell targeting by magnetic resonance imaging (MRI) in an experimental AMI model. MATERIAL AND METHODS: Bone marrow mononuclear cells (BMMNCs) were labeled with SPIO particles using two novel direct labeling methods (rotating incubation method and electroporation)...
August 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28811931/non-traumatic-rupture-of-the-superior-thyroid-artery-with-concomitant-parathyroid-adenoma-and-multinodular-goiter
#11
Natsuko Hanashiro, Tsuneo Yamashiro, Yuko Iraha, Kennosuke Karube, Hirofumi Matsumoto, Sadayuki Murayama
Cervical hemorrhage due to non-traumatic, spontaneous rupture of the thyroid artery is rare, which usually results from arterial abnormalities or parathyroid or thyroid disorders. This report describes a 72-year-old woman who presented with a sore throat and slight neck swelling. Computed tomography (CT) revealed a large hematoma in the neck and mediastinum, due to extravasation from the major branch of the left superior thyroid artery. A follow-up CT the next day demonstrated that the extravasation had resolved...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28811930/improved-ct-detection-of-acute-bowel-ischemia-using-frequency-selective-non-linear-image-blending
#12
Sven Schneeweiss, Michael Esser, Wolfgang Thaiss, Hans Boesmueller, Hendrik Ditt, Konstantin Nikolau, Marius Horger
BACKGROUND: Computed tomography (CT) as a fast and reliable diagnostic technique is the imaging modality of choice for acute bowel ischemia. However, diagnostic is often difficult mainly due to low attenuation differences between ischemic and perfused segments. PURPOSE: To compare the diagnostic efficacy of a new post-processing tool based on frequency selective non-linear blending with that of conventional linear contrast-enhanced CT (CECT) image blending for the detection of bowel ischemia...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28811929/dual-energy-computed-tomography-angiography-virtual-calcified-plaque-subtraction-in-a-vascular-phantom
#13
Kwang Nam Jin, Jin Wook Chung, Eun-Ah Park, Whal Lee
BACKGROUND: Material decomposition of dual-energy computed tomography (DECT) enables subtraction of calcified plaque. PURPOSE: To evaluate the accuracy of lumen area measurement in calcified plaque by subtraction of DECT and to determine the effect of contrast material concentration, lumen diameter, density, and thickness of calcified plaque for the measurement. MATERIAL AND METHODS: Vessel phantoms were made with six lumen diameters (5.7, 4...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28811928/hepatocellular-carcinoma-with-disseminated-skeletal-muscle-metastasis
#14
Ezamin Abdul Rahim, Mohamad Sf Noh, Nur A Ngah, Mohamad S Suraini, Mubarak M Yusof
Hepatocellular carcinoma (HCC) is the commonest primary tumor of the liver and carries a poor prognosis when diagnosed late or left untreated. Treatment relies heavily on the stage of the tumor when diagnosed. Extrahepatic metastasis is known to occur; these are mainly reported via autopsy studies or isolated case reports. Knowledge of extrahepatic metastasis is crucial in order to avoid unnecessary surgery. We report a rare case of a patient at our center, diagnosed to have HCC, who underwent treatment successfully, only to come back with extrahepatic metastasis to the skeletal muscles...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28804643/local-staging-of-sigmoid-colon-cancer-using-mri
#15
Claus Dam, Jan Lindebjerg, Anders Jakobsen, Lars Henrik Jensen, Hans Rahr, Søren Rafael Rafaelsen
BACKGROUND: An accurate radiological staging of colon cancer is crucial to select patients who may benefit from neoadjuvant chemotherapy. PURPOSE: To evaluate the diagnostic accuracy of preoperative magnetic resonance imaging (MRI) in identifying locally advanced sigmoid colon cancer, poor prognostic factors, and the inter-observer variation of the tumor apparent diffusion coefficient (ADC) values of diffusion-weighted imaging (DWI). MATERIAL AND METHODS: Using 1...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28804642/e-learning-for-medical-imaging-specialists-introducing-blended-learning-in-a-nuclear-medicine-specialist-course
#16
Torjan Haslerud, Andreas Julius Tulipan, Robert M Gray, Martin Biermann
BACKGROUND: While e-learning has become an important tool in teaching medical students, the training of specialists in medical imaging is still dominated by lecture-based courses. PURPOSE: To assess the potential of e-learning in specialist education in medical imaging. MATERIAL AND METHODS: An existing lecture-based five-day course in Clinical Nuclear Medicine (NM) was enhanced by e-learning resources and activities, including practical exercises...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28804641/breast-cancer-detected-as-an-incidental-finding-on-99m-tc-mibi-scintigraphy
#17
Toshihiro Homma, Osamu Manabe, Kazuomi Ichinokawa, Hiroko Yamashita, Noriko Oyama-Manabe, Fumi Kato, Kenji Hirata, Markus Kroenke, Nagara Tamaki
We report a case of breast cancer detected as an incidental finding on (99m)Tc-MIBI scintigraphy. (99m)Tc-MIBI scintigraphy is usually used to evaluate cardiac perfusion or to detect ectopic parathyroid adenomas; however, it is also known to sensitively detect breast cancer. Accordingly, a few reports have described the incidental detection of breast cancer by (99m)Tc-MIBI scintigraphy performed to detect parathyroid adenoma. Our present case underscores the importance of attending to any incidental findings when searching for parathyroid adenomas using (99m)Tc-MIBI scintigraphy...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28785480/intra-and-inter-observer-agreement-and-reliability-of-bone-mineral-density-measurements-around-acetabular-cup-a-porcine-ex-vivo-study-using-single-and-dual-energy-computed-tomography
#18
Bo Mussmann, Søren Overgaard, Trine Torfing, Morten Bøgehøj, Oke Gerke, Poul Erik Andersen
BACKGROUND: Periprosthetic bone loss is considered to be a potentially contributing factor in aseptic loosening of acetabular hip components, but no studies have shown this association. The lack of association might be caused by insufficient image quality because of metal artifacts and challenges in measuring bone density (BMD) in complex anatomic structures which might be overcome using dual-energy computed tomography (DECT). PURPOSE: To test inter- and intra-observer agreement and reliability of in-house segmentation software measuring BMD adjacent to acetabular cup and to compare measurements performed with single-energy CT (SECT) and DECT in cemented and cementless cups...
July 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28717519/the-diagnostic-accuracy-of-ultrasonography-for-soft-tissue-lipomas-a-systematic-review
#19
George Rahmani, Peter McCarthy, Diane Bergin
BACKGROUND: Ultrasound has been used in the diagnosis of soft-tissue lesions for well over a decade. Lipomas are the most common, benign, soft-tissue tumor and comprise adipose tissue. The sensitivity and specificity of diagnosing lipomas on ultrasound vary greatly in the literature. PURPOSE: To perform a systematic review on ultrasonography in soft-tissue lipomas to better ascertain the true diagnostic value of this test. MATERIAL AND METHODS: A systematic review of the diagnostic value of ultrasound in lipomas was performed where possible in line with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines...
June 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28717518/the-sharing-of-radiological-images-by-professional-mixed-martial-arts-fighters-on-social-media
#20
George Rahmani, Cormac W Joyce, Peter McCarthy
BACKGROUND: Mixed martial arts is a sport that has recently enjoyed a significant increase in popularity. This rise in popularity has catapulted many of these "cage fighters" into stardom and many regularly use social media to reach out to their fans. An interesting result of this interaction on social media is that athletes are sharing images of their radiological examinations when they sustain an injury. PURPOSE: To review instances where mixed martial arts fighters shared images of their radiological examinations on social media and in what context they were shared...
June 2017: Acta Radiologica Open
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