Jostein Gleditsch, Bjørn A Halvorsen, Konstantinos Bratis, Astrid D Alvim, Anders Jordal, Jan G Fjeld, Nezar Raouf, Sohail Aslam, Eike Nagel, Christian Hall
BACKGROUND: The European Society of Cardiology has published updated guidelines regarding pathways for diagnosis and management of obstructive coronary artery disease (CAD). Non-invasive functional assessment, for example, by stress perfusion cardiac magnetic resonance (stress pCMR) is recommended in patients with intermediate pretest probability of disease. Previous pCMR studies were mainly performed in high volume university hospitals with experienced radiologists or cardiologists interpreting the images...
February 2023: Acta Radiologica Open
George Hadjidekov, Dimitar Neykov
Intussusception refers to invagination of bowel loops into a neighboring, adjacent bowel segment. While it is not an uncommon entity in paediatrics-about 95% of intussusceptions occur in childhood, merely 5% of them affect the adult population. When affecting the later typically the small intestine is engaged rather than the colon. The diagnosis often represents with unspecific symptoms and is rarely considered a possibility in adults. In the past the diagnosis was typically made intraoperatively. As the Multi-Detector Computed Tomography (MDCT) of the abdomen became a referral diagnostic method, recognizing the signs of the condition is very important since some of the cases are transient, while others have an underlying malignant cause and more aggressive treatment is required...
February 2023: Acta Radiologica Open
Michael Markovitz, Kun Jiang, Daniel Kim, Trevor Rose, Jennifer B Permuth, Daniel Jeong
Intraductal papillary mucinous neoplasms (IPMN) of the pancreas have the potential for malignant progression into adenocarcinoma. Colloid or mucinous non-cystic carcinoma of the pancreas is an uncommon variant neoplasm that can arise within an intestinal type IPMN and have a relatively improved prognosis but may mimic the more lethal tubular or ductal adenocarcinoma. Colloid carcinoma is an infiltrating ductal epithelial neoplasm containing primarily extracellular stromal mucin pools and scant amount of centrally floating neoplastic cells...
February 2023: Acta Radiologica Open
Rasmus T Mikkelsen, Martin Schou, Trine Torfing, Ole Graumann, Søren Overgaard, Claus Varnum
BACKGROUND: Metal artifact reduction sequence magnetic resonance imaging (MRI) scan is a common method to detect adverse reaction to metal debris in total hip arthroplasty (THA). It might be quicker and cheaper if ultrasonography (US) could screen for the need for an MRI. However, both require trained personnel. PURPOSE: We aimed to investigate the sensitivity and specificity of US for detecting pseudotumors (PT) when performed by an orthopedic surgery resident compared to MRI...
February 2023: Acta Radiologica Open
Guoli Ren, Bo Wang, Daliang Liu
Horseshoe lung (HL) is an infrequent congenital lung anomaly. Its main feature is that the lower lungs on both sides extend behind the pericardium and fuse across the midline, usually accompanied by pulmonary dysplasia. It is reported that 80% of HL is relevant to the abnormal return of some pulmonary veins from the right lung to the inferior vena cava or right atrium (scimitar syndrome). Most patients are within 5 years old, most commonly within 1 year old, but HL may also have no apparent clinical symptoms or mild symptoms...
January 2023: Acta Radiologica Open
Victor Liaw, Man-Deuk Kim, Sunghoon Kim
Other than the expected abdominal pain post-embolization, only few complications occur after uterine artery embolization (UAE). Necrotic cavitation of adenomyosis is a particularly rare complication. Here, we describe a patient with adenomyosis who experienced persistent fever after UAE, which ultimately resolved with the spontaneous expulsion of adenomyosis.
January 2023: Acta Radiologica Open
Andrea Sibilio, Elisa Bucchi, Clarissa Alfieri, Francesco Marongiu, Annalisa Curcio
Stereotactic vacuum-assisted breast biopsy (VABB) system is generally used to perform breast biopsies after identifying suspicious lesions that are occult on ultrasound. In this case, we used an 8-Gauge VABB to retrieve a needle point retained in the outer-lower quadrant of the right breast of a patient previously treated with lumpectomy. The use of stereotactic VABB system in this specific clinical setting has been never described before and resulted minimally invasive and perfectly suitable for correct localisation and retrieval of the 3-mm needle point; moreover, it may be easily reproduced elsewhere...
December 2022: Acta Radiologica Open
John Valtersson, Benjamin S Rasmussen, Anders Elgborn, Lars Lund, Ole Graumann
BACKGROUND: Imaging-guided percutaneous biopsy of renal masses is regarded as safe and is widely used for histopathology diagnosis before treatment. Recommended observation time after tumour biopsy varies in international guidelines and the literature is sparse. PURPOSE: To assess the effect of a 1-h post-biopsy observation time of percutaneous image-guided renal mass biopsy. MATERIAL AND METHODS: This was a single-centre retrospective study...
November 2022: Acta Radiologica Open
Mauricio Canals, Andrea Canals
BACKGROUND: The role of radiology in patients with clinical suspicion of COVID-19 is evolving with scientific evidence, but there are differences in opinion on when and how the technique should be used for clinical diagnosis. PURPOSE: To estimate the pre-test and post-test probability that a patient has COVID-19 in the event of a positive and/or negative result from chest X-ray and chest computed tomography (CT) radiological studies, comparing with those of real time polymerase chain reaction (RT-PCR) tests...
November 2022: Acta Radiologica Open
Kiyoyuki Minamiguchi, Nagaaki Marugami, Tomoko Uchiyama, Hironori Kusano, Satoshi Yasuda, Masayuki Sho, Toshihiro Tanaka
We report valuable imaging findings in a case of β-catenin-activated hepatocellular adenoma (β-HCA) with weak β-catenin activation. A 40 year-old female presented with a liver tumor in S8 that was incidentally detected on ultrasonography. The tumor showed marked enhancement and early venous drainage into the middle hepatic vein in the arterial phase of contrast-enhanced computed tomography (CT). The tumor revealed slight hypointensity in the hepatobiliary phase of gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid-enhanced magnetic resonance imaging (EOB-MRI)...
November 2022: Acta Radiologica Open
Ryo Ogawa, Tomoyuki Kido, Yasuhiro Shiraishi, Yuri Yagi, Seung Su Yoon, Jens Wetzl, Michaela Schmidt, Teruhito Kido
Background: A cardiac resting phase is used when performing free-breathing cardiac magnetic resonance examinations. Purpose: The purpose of this study was to test a cardiac resting phase detection system based on neural networks in clinical practice. Material and Methods: Four chamber-view cine images were obtained from 32 patients and analyzed. The rest duration, start point, and end point were compared between that determined by the experts and general operators, and a similar comparison was done between that determined by the experts and neural networks: the normalized root-mean-square error (RMSE) was also calculated...
October 2022: Acta Radiologica Open
Yasuyuki Onishi, Hironori Shimizu, Hiroyoshi Isoda, Ken Shinozuka, Shigeru Ohtsuru, Yuji Nakamoto
Background: Transcatheter arterial embolization (TAE) is widely accepted as a treatment for bleeding from the pancreaticodoudenal artery (PDA) in patients with celiac artery stenosis. However, the technical aspect of TAE has not received much attention. Purpose: To report the technical details and success rate of TAE for bleeding from the PDA in patients with CA stenosis. Material and Methods: Between 2015 and 2021, nine TAE procedures were performed in eight patients (five women, three men; one woman underwent TAE twice)...
October 2022: Acta Radiologica Open
Mitsunari Maruyama, Takeshi Yoshizako, Rika Yoshida, Megumi Nakamura, Yoshitsugu Tajima, Hajime Kitagaki
Background: The increasing ratio of functional future liver remnant (functional %FLR) after modified associating liver partition and portal vein ligation/embolization for staged hepatectomy (modified-ALPPS) compared with portal vein embolization (PVE) has not been comprehensively evaluated. Purpose: To compare the increasing ratio of functional %FLR between modified-ALPPS and PVE via technetium-99 m-galactosyl human serum albumin single-photon emission computed tomography (99m Tc-GSA SPECT/CT) fusion imaging...
October 2022: Acta Radiologica Open
Atsushi Urikura, Tsukasa Yoshida, Masahiro Endo, Koiku Asakura, Rui Sato, Atsushi Saiga, Michihisa Moriguchi, Kazuaki Nakashima, Takeshi Aramaki
Acute pulmonary thromboembolism occurring during cancer treatment has been increasing with the number of cancer patients and chemotherapy cases. Computed tomographic pulmonary angiography (CTPA) for evaluating the pulmonary artery is generally performed using rapid injection of contrast medium. However, intravenous catheters for contrast medium injection might cause extravasation due to rapid injection. This case series describes three patients who underwent contrast-enhanced computed tomography combined with low-tube-voltage imaging and slow injection...
October 2022: Acta Radiologica Open
Jens Borgbjerg, Heidi S Christensen, Rozh Al-Mashhadi, Martin Bøgsted, Jens B Frøkjær, Lise Medrud, Nis Elbrønd Larsen, Jes S Lindholt
Background: Routine CT scans may increasingly be used to document normal aortic size and to detect incidental abdominal aortic aneurysms. Purpose: To determine whether ultra-low-dose non-contrast CT (ULDNC-CT) can be used instead of the gold standard CT angiography (CTA) for assessment of maximal abdominal aortic diameter. Materials and Methods: This retrospective study included 50 patients who underwent CTA and a normal-dose non-contrast CT for suspected renal artery stenosis...
October 2022: Acta Radiologica Open
Toshiki Murata, Masazumi Matsuda, Tetsugaku Shinozaki, Koichi Ishiyama
Meckel's cave or the trigeminal cistern is a subarachnoid space near the apex of the petrous portion of the temporal bone and contains cerebrospinal fluid and the Gasserian ganglion, which divides into the ophthalmic (V1), maxillary (V2), and mandibular (V3) nerves. Infectious, inflammatory, congenital, and neoplastic lesions can occur in Meckel's cave. Leptomeningeal metastasis of glioblastoma (GBM), IDH-wildtype to Meckel's cave is rare. We encountered a case of leptomeningeal metastasis of GBM to Meckel's cave in an elderly female patient who presented with pain around her right eye...
October 2022: Acta Radiologica Open
Elena Tonkopi, Eline Jahre Wikan, Tor Olav Hovland, Sivert Høgset, Thomas Alexander Kofod, Selasi K Sefenu, Emily Hughes-Ryan, Dakota D Entremont-O Connell, Catherine Gunn, Tanja Holter, Safora Johansen
Background: Computed tomography (CT) contributes to 60% of the collective dose in medical imaging. Literature has demonstrated that patient dose varies across regions and countries. Establishing diagnostic reference levels (DRLs) contributes to the optimization of clinical practices and radiation protection. Purpose: To survey the dose indices (CTDIvol and dose-length product) for frequently performed CT examinations from the chosen hospitals in Norway and Canada and to determine local DRLs (LDRLs) based on the collected data...
October 2022: Acta Radiologica Open
Luz M Morán, Jesús Vega, Nieves Gómez-León, Ana Royuela
Background: The differentiation between myxomas and myxoid liposarcomas (MLPS) often is a serious challenge for the radiologists. Magnetic resonance imaging (MRI) is the most useful imaging technique in characterization of the soft tissue tumors (STT). Purpose: To evaluate in a sample of myxomas and MLPS of the extremities, what morphological findings in conventional MRI allow us to differentiate these two types of myxoid tumors, in addition to analyzing the validity of the apparent diffusion coefficient (ADC) values of diffusion-weighted MRI (DW-MRI)...
October 2022: Acta Radiologica Open
Hisashi Komoto, Kazuhiro Kitajima, Naoto Azuma, Masao Tamura, Hiroyuki Yokoyama, Tatsuya Tsuchitani, Koichiro Yamakado
We report here a case of sternoclavicular arthritis due to SAPHO syndrome in a 60-year-old female in which quantitative values determined using bone SPECT/CT were useful to evaluate response. After celecoxib and alendronate sodium hydrate therapy, the chief complaints were well relieved and post-treatment Tc-99m HMDP bone SPECT/CT examination showed decreased uptake. The maximum standardized uptake value (SUV), peak SUV, mean SUV, metabolic bone volume, and total bone uptake of the untreated lesion were 18, 16, 10, 17 mL, and 180, respectively, which were decreased to 8, 7, 5, 15 mL, and 75, respectively, after the treatment...
October 2022: Acta Radiologica Open
Shu Matsushita, Shinichi Hamamoto, Ryo Morita, Michinori Shirano, Takeshi Inoue, Tomohisa Okuma, Takao Manabe
We report a rare case of retroperitoneal pseudotumor caused by Schistosoma japonicum that was diagnosed by computed tomography (CT) guided percutaneous biopsy in a 15-year-old Filipino male. Computed tomography (CT) and magnetic resonance imaging (MRI) revealed a mass lesion, including a mesenteric artery, in the right retroperitoneal space. His mother had a history of S. japonicum infection but his initial stool examination was negative. As schistosomiasis was suspected, cone-beam CT-guided biopsy was performed to enable transcatheter therapeutic arterial embolization to be performed immediately in the event of hemorrhage...
September 2022: Acta Radiologica Open
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