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Acta Radiologica Open

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https://www.readbyqxmd.com/read/29201434/influence-of-longitudinal-position-on-the-evolution-of-steady-state-signal-in-cardiac-cine-balanced-steady-state-free-precession-imaging
#1
Tyler J Spear, Tori A Stromp, Steve W Leung, Moriel H Vandsburger
Background: Emerging quantitative cardiac magnetic resonance imaging (CMRI) techniques use cine balanced steady-state free precession (bSSFP) to measure myocardial signal intensity and probe underlying physiological parameters. This correlation assumes that steady-state is maintained uniformly throughout the heart in space and time. Purpose: To determine the effects of longitudinal cardiac motion and initial slice position on signal deviation in cine bSSFP imaging by comparing two-dimensional (2D) and three-dimensional (3D) acquisitions...
November 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/29163987/medial-collateral-ligament-calcification-a-rare-knee-pain-entity-with-literature-review
#2
Md Abu Bakar Siddiq, Israt Jahan
Medial knee pain can originate from both osseous and non-osseous soft tissue structures including medial collateral ligament (MCL), creating a raft for patients' sufferings. Previously published works demonstrated MCL calcification as a rare medial knee pain entity. Alongside physical examination, radio-imaging techniques, namely conventional X-ray, CT/MRI scanning, etc. have been reported to be useful in recognizing MCL calcification. The present study demonstrates MCL calcification in a 60-year-old Asian-Bangladeshi woman, using high frequency diagnostic ultrasonogram and is the first reported study in the literature...
November 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/29123920/a-prospective-study-comparing-whole-body-skeletal-x-ray-survey-with-18f-fdg-pet-ct-18f-naf-pet-ct-and-whole-body-mri-in-the-detection-of-bone-lesions-in-multiple-myeloma-patients
#3
Eva Dyrberg, Helle W Hendel, Gina Al-Farra, Lone Balding, Vibeke B Løgager, Claus Madsen, Henrik S Thomsen
Background: For decades, the most widely used imaging technique for myeloma bone lesions has been a whole-body skeletal X-ray survey (WBXR), but newer promising imaging techniques are evolving. Purpose: To compare WBXR with the advanced imaging techniques 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT), 18F-sodium fluoride (NaF) PET/CT and whole-body magnetic resonance imaging (WB-MRI) in the detection of myeloma bone lesions...
October 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/29123919/t2-mapping-and-post-contrast-t1-dgemric-of-the-patellar-cartilage-12-year-follow-up-after-patellar-stabilizing-surgery-in-childhood
#4
Eva Bengtsson Moström, Eveliina Lammentausta, Thröstur Finnbogason, Lars Weidenhielm, Per-Mats Janarv, Carl Johan Tiderius
Background: Cartilage degeneration has been reported after recurrent patellar dislocation. However, effects of surgical stabilization in childhood have not yet been described. Purpose: To examine the cartilage quality in very young adults operated with a patellar stabilizing procedure due to recurrent patellar dislocation in childhood, and evaluate if cartilage quality correlates with clinical parameters and patient-reported outcomes. Material and Methods: Seventeen patients were investigated ≥ 5 years (mean = 11...
October 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/29085671/mri-texture-features-may-predict-differentiation-and-nodal-stage-of-cervical-cancer-a-pilot-study
#5
Anton S Becker, Soleen Ghafoor, Magda Marcon, Jose A Perucho, Moritz C Wurnig, Matthias W Wagner, Pek-Lan Khong, Elaine Yp Lee, Andreas Boss
BACKGROUND: Texture analysis in oncological magnetic resonance imaging (MRI) may yield surrogate markers for tumor differentiation and staging, both of which are important factors in the treatment planning for cervical cancer. PURPOSE: To identify texture features which may predict tumor differentiation and nodal status in diffusion-weighted imaging (DWI) of cervical carcinoma. MATERIAL AND METHODS: Twenty-three patients were enrolled in this prospective, institutional review board (IRB)-approved study...
October 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/29051834/fdg-avid-breast-cancer-bone-metastases-silent-on-ct-and-scintigraphy-a-case-report-with-radiologic-pathologic-correlation
#6
Daniel Jeong, Marilyn Bui, Daniel Peterson, Jaime Montilla-Soler, Kenneth L Gage
Bone is the one of the most common distant metastatic sites in breast cancer. Routine initial breast cancer staging evaluation typically includes computed tomography (CT) and skeletal scintigraphy while 18F fluorodeoxyglucose (FDG) positron emission tomography-computed tomography (PET-CT) is reserved for clinically high-risk cases. Since FDG PET-CT is not routinely performed during staging or surveillance evaluations, it is important for radiologists and clinicians to appreciate the limitations of bone metastasis detection on CT and scintigraphy...
October 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/28989798/how-to-train-radiology-residents-to-diagnose-pulmonary-embolism-using-a-dedicated-mri-protocol
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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