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Acta Radiologica

Marc Mespreuve, Luc De Smet, Kristof De Cuyper, Karl Waked, Filip Vanhoenacker
Background A carpal boss is a potentially painful bony mass in the region of the second or third carpometacarpal joint. The combination of clinical examination and radiography is usually sufficient for the diagnosis. Purpose To determine whether magnetic resonance imaging (MRI) examination of the quadrangular joint can assist the diagnosis of persistent pain near a carpal boss. Material and Methods Fifty-seven patients with a carpal boss were retrospectively reviewed using MRI and conventional radiographs and compared to an asymptomatic control group...
October 2017: Acta Radiologica
Yedaun Lee, Seung Soo Lee, Hyunhee Cheong, Chang Kyung Lee, Namkug Kim, Woo-Chan Son, Seung Mo Hong
Background With the introduction of targeted therapies, there has been a growing need for non-invasive imaging methods which accurately evaluate therapeutic effects and overcome the limitations of tumor size-based therapeutic response assessments. Purpose To assess diagnostic values of intra-voxel incoherent motion (IVIM) imaging in evaluating therapeutic effects of sorafenib on hepatocellular carcinoma (HCC) using mouse xenograft model. Material and Methods Twenty-four mice bearing Huh-7 were divided into a control group and two treatment groups received sorafenib doses of 5 mg/kg (5 mg-Tx) or 30 mg/kg (30 mg-Tx)...
September 2017: Acta Radiologica
Pasi Karjalainen, Tuomas Paana, Antti Ylitalo, Jussi Sia, Wail Nammas
Background Inadequate neointimal coverage of stent struts is associated with late stent thrombosis. Purpose To demonstrate the extent of neointimal coverage and strut malapposition in titanium-nitride-oxide-coated bioactive stents (BAS) versus everolimus-eluting stents (EES) by optical coherence tomography (OCT) performed at 18-month follow-up. Material and Methods In the BASE-ACS trial, 827 patients presenting with acute coronary syndrome were randomized to receive either BAS or EES. Forty patients (20 BAS, 20 EES) underwent OCT at 18-month follow-up for evaluation of stent strut coverage, malapposition, and neointimal hyperplasia (NIH)...
September 2017: Acta Radiologica
Michael Worlicek, Markus Weber, Benjamin Craiovan, Florian Zeman, Joachim Grifka, Tobias Renkawitz, Michael Wörner
Background The estimation of femoral version in preoperative planning of total hip arthroplasty and to assess complications after total hip arthroplasty is crucial. Recent studies have recommended the posterior lesser trochanter line as an intraoperative reference for estimating femoral version. We hypothesized, that if there is a correlation, the posterior lesser trochanter line could be used to assess femoral version in computed tomography (CT) scans. Purpose To evaluate the correlation between the posterior lesser trochanter line and the posterior femoral condyle axis...
September 2017: Acta Radiologica
Guobing Liu, Yanjuan Qu, Xin Chen, Meiyan Liao, Huijuan Hu, Yiyuan Cao, Zhixiong Tian
Background Clinical-radiological correlation of myocardial bridge (MB) remains unclear. Purpose To correlate clinical symptoms and outcomes of MBs with computed tomography (CT) coronary angiography findings. Material and Methods A total of 2092 patients with CT coronary angiography were collected. Patients were divided into symptomatic and asymptomatic groups, adverse heart events (AHE) and non-AHE groups, MB and non-MB groups, as well as left anterior descending (LAD)-MB and non-LAD-MB groups. Statistical analyses were performed to identify inter-group differences, and clinical-radiological correlations of MBs or mural coronary arteries (MCAs)...
September 2017: Acta Radiologica
Yunyun Duan, Zheng Liu, Yaou Liu, Jing Huang, Zhuoqiong Ren, Zheng Sun, Hai Chen, Huiqing Dong, Jing Ye, Kuncheng Li
Background Previous studies with a small sample size have not reported metabolic changes in neuromyelitis optica (NMO). Metabolic changes, such as decreased N-acetylaspartate (NAA), are well-established in patients with multiple sclerosis (MS). It remains unknown whether different patterns of metabolic changes occur in NMO and MS. Purpose To investigate the metabolic changes in normal-appearing white matter (NAWM) in NMO, compared with MS patients and healthy controls (HC), and correlate these changes with clinical disability...
September 2017: Acta Radiologica
Yoshie Kunihiro, Munemasa Okada, Naofumi Matsunaga
Background The cutoff value for assessing the severity of acute pulmonary thromboembolism (PTE) using relative volumetric evaluations of dual-energy perfusion computed tomography (DEpCT) is unclear. Purpose To determine the proper cutoff value for determining the severity of PTE using DEpCT volumetry. Material and Methods A total of 185 patients with venous thromboembolism were included in this study, of whom 61 were diagnosed with acute PTE. DEpCT images were three-dimensionally reconstructed at the following attenuation ranges: 1-2 HU (V2), 1-10 HU (V10), and 1-120 HU (V120)...
September 2017: Acta Radiologica
Jong Won Park, Kyung Hee Ko, Eun-Kyung Kim, Cherie M Kuzmiak, Hae Kyoung Jung
Background Breast cancer can present as non-mass lesions (NMLs) on ultrasound. However, knowledge of and understanding about NMLs are scarce. Purpose To retrospectively investigate the final outcomes of sonographic breast NMLs and determine the clinical and radiologic variables associated with malignancy Material and Methods In our radiologic database of breast ultrasound examinations between 2011 and 2014, we found 119 women with 121 NMLs with available histopathologic or sonographic follow-up (over 2 years) data...
September 2017: Acta Radiologica
Yuzuru Kono, Hiroaki Kurihara, Hiroshi Kawamoto, Naoko Yasui, Naoki Honda, Hiroshi Igaki, Jun Itami
Background Boron neutron capture therapy (BNCT) is a molecular radiation therapy approach based on the (10)B (n, α) (7)Li nuclear reaction in cancer cells. In BNCT, delivery of (10)B in the form of 4-borono-phenylalanine conjugated with fructose (BPA-fr) to the cancer cells is important. The PET tracer 4-borono-2-18F-fluoro-phenylalanine (FBPA) has been used to predict the accumulation of BPA-fr before BNCT. Purpose To determine the biodistribution and dosimetric parameters in 18F-BPA PET/CT studies. Material and Methods Human biokinetic data were obtained during clinical 18F-BPA PET studies between February and June 2015 at one institution...
September 2017: Acta Radiologica
Seok Hahn, Young Han Lee, Yong-Min Chun, Eun Hae Park, Jin-Suck Suh
Background Specific findings on magnetic resonance arthrography (MRA) that indicate the need for surgery in patients with partial articular-sided supraspinatus tendon avulsion (PASTA) are not well understood. Purpose To determine which MRA findings are characteristic of patients who undergo surgery for PASTA. Material and Methods From July 2011 to February 2014, MRA findings for patients treated for PASTA were retrospectively reviewed. The patients were divided into two groups: conservative treatment and surgical repair...
September 2017: Acta Radiologica
Jakob Weiss, Mike Notohamiprodjo, Klement Neumaier, Minglun Li, Wilhelm Flatz, Konstantin Nikolaou, Andreas Pomschar
Background Fluoroscopy is a frequently used examination in clinical routine without appropriate research evaluation latest hardware and software equipment. Purpose To evaluate the feasibility of low-dose pulsed video-fluoroscopic swallowing exams (pVFSE) to reduce dose exposure in patients with swallowing disorders compared to high-resolution radiograph examinations (hrVFSE) serving as standard of reference. Material and Methods A phantom study (Alderson-Rando Phantom, 60 thermoluminescent dosimeters [TLD]) was performed for dose measurements...
September 2017: Acta Radiologica
Janni Jensen, Bo R Mussmann, John Hjarbæk, Zaid Al-Aubaidi, Niels W Pedersen, Oke Gerke, Trine Torfing
Background Children with leg length discrepancy often undergo repeat imaging. Therefore, every effort to reduce radiation dose is important. Using low dose preview images and noise reduction software rather than diagnostic images for length measurements might contribute to reducing dose. Purpose To compare leg length measurements performed on diagnostic images and low dose preview images both acquired using a low-dose bi-planar imaging system. Material and Methods Preview and diagnostic images from 22 patients were retrospectively collected (14 girls, 8 boys; mean age, 12...
September 2017: Acta Radiologica
Yan Xu, Lijing Zhu, Tong Ru, Huanhuan Wang, Jian He, Zhengyang Zhou, Xiaofeng Yang
Background Three-dimensional power Doppler ultrasound (3D-PDU) imaging has been widely applied to the differentiation of benign and malignant cervical lesions; however, its potential value for predicting response to chemo-radiotherapy has not been fully explored. Purpose To investigate the feasibility of 3D-PDU imaging in predicting treatment response in patients receiving concurrent chemo-radiotherapy (CCRT) for advanced cervical cancer. Material and Methods Fifty-two patients with advanced cervical cancer who received CCRT underwent 3D-PDU examinations at four timepoints: pre-therapy (baseline), 1 week and 2 weeks during, as well as immediately post CCRT...
September 2017: Acta Radiologica
Bariq Al-Amiry, Sarwar Mahmood, Ferid Krupic, Arkan Sayed-Noor
Background Restoration of femoral offset (FO) and leg length is an important goal in total hip arthroplasty (THA) as it improves functional outcome. Purpose To analyze whether the problem of postoperative leg lengthening and FO reduction is related to the femoral stem or acetabular cup positioning or both. Material and Methods Between September 2010 and April 2013, 172 patients with unilateral primary osteoarthritis treated with THA were included. Postoperative leg-length discrepancy (LLD) and global FO (summation of cup and FO) were measured by two observers using a standardized protocol for evaluation of antero-posterior plain hip radiographs...
September 2017: Acta Radiologica
Koichiro Yasaka, Toshihiro Furuta, Takatoshi Kubo, Eriko Maeda, Masaki Katsura, Jiro Sato, Kuni Ohtomo
Background Abdominal computed tomography (CT) without arm elevation is associated with degraded image quality due to streak artifacts. Purpose To compare the degree of streak artifacts in abdominal CT images without arm elevation between full iterative reconstruction (IR), hybrid IR, and filtered back projection (FBP) using two commercially available scanners. Material and Methods First, a phantom study simulating CT examination without arm elevation was performed. Second, unenhanced axial images of 33 patients (17 and 16 patients for each vendor) who underwent CT without arm elevation were reconstructed with full IR, hybrid IR and FBP...
September 2017: Acta Radiologica
Zafer Koc, Gurcan Erbay, Elif Karadeli
Background Standards for abdominal diffusion-weighted imaging (DWI), apparent diffusion coefficient (ADC) measurements, and analysis are required for reproducibility. Purpose To identify optimal internal comparison standards for DWI to normalize the measured ADC for increased accuracy of differentiating malignant and benign abdominal lesions. Material and Methods We retrospectively studied 97 lesions (89 patients; age, 57 ± 13 years) with histopathologically confirmed abdominal disease. Seven normal body parts/contents (normal parenchyma, spleen, kidney, gallbladder bile, paraspinal muscle, spinal cord, and cerebrospinal fluid [CSF]) were assessed as internal references for possible use as comparison standards...
September 2017: Acta Radiologica
Du Xuesong, Xue Wei, Liu Heng, Chen Xiao, Wang Shunan, Guo Yu, Zhang Weiguo
Background Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) has been proved useful in evaluating glioma angiogenesis, but the utility in evaluating neovascularization patterns has not been reported. Purpose To evaluate in vivo real-time glioma neovascularization patterns by measuring glioma perfusion quantitatively using DCE-MRI. Material and Methods Thirty Sprague-Dawley rats were used to establish C6 orthotopic glioma model and underwent MRI and pathology detections. As MRI and pathology were performed at six time points (i...
September 2017: Acta Radiologica
Yu-Zhen Shi, Mao-Zhen Chen, Wei Huang, Li-Li Guo, Xiao Chen, Dan Kong, Ying-Ying Zhuang, Yi-Ming Xu, Rui-Rui Zhang, Gen-Ji Bo, Zhong-Qiu Wang
Background Atypical choroid plexus papilloma (APP) is a rare, newly introduced entity with intermediate characteristics. To date, few reports have revealed the magnetic resonance (MR) findings. Purpose To analyze the clinicopathological and MR features of APP. Material and Methods The clinicopathological data and preoperative MR images of six patients with pathologically proven APP were retrospectively reviewed. The MR features including tumor location, contour, signal intensity, degree of enhancement, intratumoral cysts, and necrosis; and flow voids, borders, peritumoral edema, and associated hydrocephalus were analyzed...
August 2017: Acta Radiologica
Michael L Wells, Adam T Froemming, Akira Kawashima, Terri J Vrtiska, Bohyun Kim, Robert P Hartman, David R Holmes, Rickey E Carter, Adam C Bartley, Shuai Leng, Cynthia H McCollough, Joel G Fletcher
Background Detection of small renal calculi has benefitted from recent advances in computed tomography (CT) scanner design. Information regarding observer performance when using state-of-the-art CT scanners for this application is needed. Purpose To assess observer performance and the impact of radiation dose for detection and size measurement of <4 mm renal stones using CT with integrated circuit detectors and iterative reconstruction. Material and Methods Twenty-nine <4 mm calcium oxalate stones were randomly placed in 20 porcine kidneys in an anthropomorphic phantom...
August 2017: Acta Radiologica
Chan Kue Park, Hoon Kwon, Ji Young Park
Background To date, there has been no computed tomography (CT) evaluation of adenovirus pneumonia in a large number of immunocompetent patients. Purpose To describe the thin-section CT findings of immunocompetent patients with adenovirus pneumonia. Material and Methods We prospectively enrolled 104 patients with adenovirus pneumonia from a military hospital. CT scans of each patient were retrospectively and independently assessed by two radiologists for the presence of abnormalities, laterality and zonal predominance of the parenchymal abnormalities, and dominant imaging patterns and their anatomic distributions...
August 2017: Acta Radiologica
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