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Acta Radiologica | Page 2

Bjarke B Hansen, Urszula M Ciochon, Charlotte R Trampedach, Anders F Christensen, Zoreh Rasti, Mikael Boesen
BACKGROUND: More advanced disc degeneration on magnetic resonance imaging (MRI) is found in individuals with low back pain. However, it is unclear whether this grading is independent of the scanner's field strength. PURPOSE: To compare disc degeneration on high- versus low-field MRI. MATERIAL AND METHODS: Low back pain patients were enrolled to undergo high-field (3 T) MRI, followed by low-field (0.25 T) MRI of the lumbar spine within 3 h...
April 19, 2019: Acta Radiologica
Xavier Gallardo, Jaume Almirall, Eva Castaner, Marta Andreu, Elena Gonzalez, Beatriz Consola
BACKGROUND: The existence of contrast-induced nephropathy is widely accepted. Recent studies suggest its incidence has been overestimated. PURPOSE: To determine the effect of intravenous iodinated contrast agents on renal function in patients with chronic renal failure without acute disease that can interfere with the assessment of renal function. MATERIAL AND METHODS: We prospectively analyzed changes in serum creatinine levels after intravenous administration of iodinated contrast agents in all patients with chronic renal failure (creatinine clearance < 60 mL/min by the CKD-EPI Equation) without acute disease referred for computed tomography (CT) follow-up of aortic aneurysm...
April 18, 2019: Acta Radiologica
Yoshiharu Ohno, Yasuko Fujisawa, Naoki Sugihara, Yuji Kishida, Hisanobu Koyama, Shinichiro Seki, Takeshi Yoshikawa
BACKGROUND: Xenon (Xe)-enhanced area-detector computed tomography (ADCT) can visualize regional distribution of Xe within the lungs and demonstrate regional ventilation differences in smokers and patients with pulmonary diseases. PURPOSE: The purpose of this study was to evaluate the capability of wash-in and wash-out (WI/WO) phase Xe-enhanced ADCT for detecting regional ventilation differences based on underlying lung conditions, pulmonary functional loss evaluation, and clinical stage prediction for smokers with and without chronic obstructive pulmonary disease (COPD)...
April 18, 2019: Acta Radiologica
Lu Gao, Yi Lv, Yingying Jin, Fang Han, Zhenwei Yao, Jian Yang, Jiawen Zhang
BACKGROUND: It is difficult to distinguish atypical cancerous nodule from cirrhosis nodule. PURPOSE: To investigate the value of spectral computed tomography (CT) imaging parameters in differentiating hepatic cancerous nodules from cirrhosis nodules. MATERIAL AND METHODS: Forty-six patients with hepatic nodules underwent contrast-enhanced CT scans in spectral mode. Monochromatic CT images and iodine/water-based material-decomposition images were synthesized...
April 3, 2019: Acta Radiologica
Jeong Hee Yoon, Jeong Min Lee, Kyung Bun Lee, Dongeun Kim, Hiroyuki Kabasawa, Joon Koo Han
BACKGROUND: Hepatic fibrosis is a dynamic, reversible process which can result in liver failure. Diagnosis and monitoring of hepatic fibrosis are clinically important. PURPOSE: To compare the diagnostic performance of diffusion kurtosis imaging (DKI), intravoxel incoherent motion (IVIM), and monoexponential diffusion-weighted imaging (DWI) to detect clinically significant fibrosis (≥ F2). MATERIAL AND METHODS: This retrospective study was approved by Institutional Review Board and the requirement of informed consent was waived...
April 1, 2019: Acta Radiologica
Zebin Xiao, Zuohua Tang, Lingjie Wu, Xiaoyuan Feng, Xinghuai Sun, Weijun Tang, Jie Wang, Lixin Jin, Rong Wang
BACKGROUND: Little is known about the specificity of manganese-enhanced magnetic resonance imaging (MEMRI) and its neurotoxic effect of the whole visual pathway. PURPOSE: To explore the specificity of MEMRI and the neurotoxic effect in the whole visual pathway. MATERIAL AND METHODS: Twenty-four rats were divided into four groups, in which 50, 100, 200, and 400 nmol MnCl2 were injected into the left eye of each rat through intravitreal injection, respectively...
March 28, 2019: Acta Radiologica
Haitao Sun, Shilong Zhang, Kai Liu, Jianjun Zhou, Xingxing Wang, Tingting Shen, Xiaolin Wang
BACKGROUND: The accurate estimation of the Ki-67 index of well-differentiated pancreatic neuroendocrine tumors (PanNET) not only guides curative management but also avoids unnecessary treatment. PURPOSE: To investigate whether magnetic resonance imaging (MRI) features could preoperatively discriminate the Ki-67 index of well-differentiated G1/G2 PanNETs and to construct an individualized predictive model through developing a MRI-based nomogram. MATERIAL AND METHODS: Ninety-nine patients with G1/G2 PanNETs were divided into Ki-67 index <5% (n = 58) and Ki-67 index ≥5% groups (n = 41)...
March 26, 2019: Acta Radiologica
Fumiko Kinoshita, Toshibumi Kinoshita, Hideto Toyoshima, Yuki Shinohara
BACKGROUND: A focal brain lesion influences the function and morphology in the connected intact regions remote from it. However, it is not well documented that thalamic stroke may induce secondary degeneration of the mammillary body (MB) or the fornix (Fx). PURPOSE: To investigate transneuronal degeneration (TND) in the MB and Fx following thalamic stroke on magnetic resonance imaging (MRI) and to assess the time course of these findings using serial MRI after stroke...
March 25, 2019: Acta Radiologica
Jae Sung Yun, Hye Won Chung, Joon Seon Song, Sang Hoon Lee, Min Hee Lee, Myung Jin Shin
BACKGROUND: The morphology of musculoskeletal dedifferentiated liposarcoma was previously reported as well-defined non-lipomatous masses juxtaposed with fatty tumors. PURPOSE: To establish a new spectrum of magnetic resonance imaging (MRI) findings for dedifferentiated liposarcoma according to the quantity and distribution of the non-fatty component in the tumor. MATERIAL AND METHODS: This study consisted of a retrospective review of MRI of 14 patients with a total of 18 histopathologically proven dedifferentiated liposarcoma lesions in the musculoskeletal area...
March 24, 2019: Acta Radiologica
Tina R Haave, Frode Manstad-Hulaas, Reidar Brekken
BACKGROUND: Percutaneous transluminal angioplasty (PTA) is an established treatment of arteriovenous fistula (AVF) stenosis. Drug-coated balloons (DCB) are coated with an antiproliferative drug intended to decrease neointimal hyperplasia and restenosis. PURPOSE: To investigate the patency after treatment of restenosis in radiocephalic AVFs with PTA versus DCB. MATERIAL AND METHODS: A retrospective study comprising 26 patients, recruited from treatment registers, receiving at least one previous PTA and a re-intervention (13 PTAs and 13 DCBs) at the same anatomic location, were observed for 24 months...
March 21, 2019: Acta Radiologica
Anna Nordgren Rogberg, Deepa Gopalan, Eli Westerlund, Peter Lindholm
BACKGROUND: Chronic thromboembolic pulmonary hypertension (CTEPH), a complication of acute pulmonary embolism, is a potentially curable form of pulmonary hypertension (PH). CTEPH is under-diagnosed for a number of reasons leading to delayed referral or missed diagnosis; however, the frequency of misdiagnosis of CTEPH findings on computed tomography (CT) is currently unknown. PURPOSE: To evaluate the extent of misdiagnosis of CTEPH on CT. MATERIAL AND METHODS: We studied the original CT reports from 35 patients with confirmed CTEPH diagnosis referred to a specialist center for pulmonary endarterectomy during 2011-2016...
March 21, 2019: Acta Radiologica
Ulrich Grosse, Gerd Grözinger, Roland Syha, Dominik Ketelsen, Sasan Partovi, Konstantin Nikolaou, Rüdiger Hoffmann
BACKGROUND: Bronchial artery embolization (BAE) can be a challenging intervention due to variations of the vascular anatomy. PURPOSE: To evaluate the utility of C-arm cone-beam computed tomography (CBCT) for BAE in patients with hemoptysis and indefinite bronchial artery (BA) anatomy on pre-interventional CT imaging. MATERIAL AND METHODS: From November 2016 to July 2017, 17 patients (mean age = 64.3 ± 14.7 years) with hemoptysis underwent BAE including pre-interventional CT, aortography, and CBCT during the procedure...
March 21, 2019: Acta Radiologica
Peipei Zhang, Xiangde Min, Liang Wang, Zhaoyan Feng, Zan Ke, Huijuan You, Chanyuan Fan, Qiubai Li
BACKGROUND: The diagnostic efficacy of mono- and bi-exponential diffusion models are controversial in prostate cancer (PCa) aggressiveness evaluation. Whole-tumor histogram analysis may have the potential to improve their efficacy. PURPOSE: To compare the efficacy of mono- and bi-exponential diffusion models for evaluating PCa aggressiveness using whole-tumor histogram analysis. MATERIAL AND METHODS: In this retrospective study, 72 patients with PCa confirmed by radical prostatectomy were included...
March 21, 2019: Acta Radiologica
Ga Young Yoon, Joo Hee Cha, Hak Hee Kim, Hee Jung Shin, Eun Young Chae, Woo Jung Choi
BACKGROUND: Invasive micropapillary carcinoma (IMPC) is a rare subtype of breast cancer and is presumed to have a poorer survival outcome than invasive ductal carcinoma (IDC). However, studies for clinical outcomes including imaging features are still scarce. PURPOSE: To investigate differences in clinical outcomes between IMPC and IDC and to determine prognostic factors indicating survival, including imaging features. MATERIAL AND METHODS: This retrospective study was approved by the institutional review board...
March 21, 2019: Acta Radiologica
Philip Hoelter, Philipp Goelitz, Stefan Lang, Hannes Luecking, Bernd Kalmuenzer, Tobias Struffert, Arnd Doerfler
BACKGROUND: Flat detector computed tomography angiography (FDCTA) can be reconstructed from volume perfusion flat detector computed tomography (VP-FDCT). Thus, CTA equivalent stroke imaging might be feasible within the angio suite. PURPOSE: To evaluate the diagnostic accuracy of FDCTA in detecting large vessel occlusion (LVO) and collateral supply in acute stroke patients. MATERIAL AND METHODS: Sixteen patients with LVO of the anterior circulation were analyzed retrospectively...
March 12, 2019: Acta Radiologica
Riham Dessouky, Lihua Zhang, Vibhor Wadhwa, Yin Xi, Avneesh Chhabra
BACKGROUND: Author self-citation can affect quantitative aspects of scientific research. However, little is known about its prevalence in radiology literature. PURPOSE: The aim of this study was to determine the frequency and factors associated with author self-citation in musculoskeletal radiology. MATERIAL AND METHODS: Retrospective review of bibliographic data in musculoskeletal radiology articles of two separate journals over a 23-month period (January 2015 to November 2016) was performed to determine frequency of author self-citations...
March 7, 2019: Acta Radiologica
Janni Jensen, Benjamin Sb Rasmussen, Louise A Duus, Trine Torfing, Helle Precht, Hans Tromborg, Ole Graumann
BACKGROUND: Distal radius fracture characterization and treatment are mainly based on radiographic measurements but with contradictory findings on the correlation of those measurements to clinical outcome. Before applying radiographic measurement to the treatment decision and before correlating the measurements to clinical outcome, an accuracy of measurements must be established. PURPOSE: To summarize existing evidence on accuracy of the radiographic measurements of: (i) dorsal/volar tilt of the distal radius; (ii) radial shortening; (iii) ulnar variance; (iv) radial inclination; and (v) articular step-off of the distal radius...
March 7, 2019: Acta Radiologica
Charles R Tapping, Phil Boardman
BACKGROUND: Prostate artery embolization (PAE) is safe and effective at improving lower urinary tract symptoms (LUTS) in men with benign prostatic hyperplasia (BPH). PURPOSE: To assess the effectiveness of PAE on allowing successful voiding in patients with obstructive BPH (>90 cc) necessitating a urethral catheter for complete urinary retention. MATERIAL AND METHODS: Ten consecutive patients with urethral catheters for obstructing BPH were included in the prospective study...
March 7, 2019: Acta Radiologica
Marta Della Seta, Federico Collettini, Julius Chapiro, Alexander Angelidis, Fidelis Engeling, Bernd Hamm, David Kaul
BACKGROUND: Brain metastases (BM) are the most frequent intracranial malignant tumor. Various prognostic factors facilitate the prediction of survival; however, few have become tools for clinical use. PURPOSE: To investigate the role of three-dimensional (3D) quantitative tissue enhancement in pre-treatment cranial magnetic resonance imaging (MRI) as a radiomic biomarker for survival (OS) in patients with singular BM treated with stereotactic radiation therapy (SRT)...
March 6, 2019: Acta Radiologica
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March 4, 2019: Acta Radiologica
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