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Acta Radiologica

Ying-Mei Zheng, Jing Chen, Ming-Gang Yuan, Zeng-Jie Wu, Cheng Dong
BACKGROUND: Acute intracranial hypertension (IH) is commonly found in patients with cerebral venous thrombosis (CVT). Some magnetic resonance imaging (MRI) findings that are suggestive of acute IH and are thus important for planning treatment and improving clinical outcomes have been reported; however, the significance of changes in ventricular size in the presence of acute CVT-related IH remains unclear. PURPOSE: To investigate changes in ventricular size in patients with CVT-related IH by MRI and to determine whether such changes are predictors of IH in these patients...
January 12, 2019: Acta Radiologica
Ayako Ono, Shigeki Arizono, Shigeshi Kohno, Hirotsugu Nakai, Hiroyoshi Isoda, Bernd Kühn, Kaori Togashi
BACKGROUND: Visualizing non-dilated biliary system is important for preoperative mapping of living donor liver transplantation (LDLT) donors. PURPOSE: To evaluate diagnostic accuracy of three-dimensional (3D) magnetic resonance cholangiography (MRC) within a breath-hold (BH) using compressed sensing (CS) acceleration in visualizing non-dilated biliary system in LDLT donors. MATERIAL AND METHODS: For this prospective study, 43 donors who underwent LDLT were enrolled...
January 12, 2019: Acta Radiologica
Hee Ho Chu, Ji Hoon Shin, Jong Woo Kim, Jin-Hyoung Kim, Heung-Kyu Ko
BACKGROUND: Percutaneous transesophageal gastrotubing (PTEG) is an alternative means of access into the stomach when conventional transabdominal gastric access is not possible. PURPOSE: To describe the early clinical experience, technical feasibility, safety, and efficacy of the hydro-dissection assisted puncture of an esophageal balloon used for PTEG. MATERIAL AND METHODS: A retrospective review was conducted of six, consecutive patients with feeding problems and who were treated with hydro-dissection assisted puncture of an esophageal balloon for PTEG...
January 12, 2019: Acta Radiologica
Anne Marie Augustin, Victoria Cao, Friederika Fluck, Julian Kunz, Thorsten Bley, Ralph Kickuth
BACKGROUND: Percutaneous biliary drainage (PTBD) is a necessary procedure in several benign and malignant conditions. After PTBD removal biliocutaneous fistula is a rare but potential complication. Different embolization agents have been used for transhepatic catheter tract embolization in the past, while there is only little experience using gelatin sponge for this procedure. PURPOSE: To evaluate the feasibility and safety of PTBD tract embolization with gelatin sponge...
January 10, 2019: Acta Radiologica
Jieun Kim, Seung Ho Kim, Tae Oh Kim
BACKGROUND: Unnecessary prolonged treatment with biologic agents for Crohn's disease (CD) patients with endoscopic complete remission (CR) might increase the opportunistic infections. PURPOSE: To evaluate computed tomography enterography (CTE) findings obtained on CD patients achieving endoscopic CR after anti-tumor necrosis factor (TNF)-α therapy. MATERIAL AND METHODS: Thirty-six consecutive patients with CD who had received anti-TNF- α therapy and undergone pre-and post-therapy CTE and ileocolonoscopy were initially enrolled...
January 10, 2019: Acta Radiologica
Roshan A Karunamuni, Nathan S White, Annette Fromm, Gunnar Moen, Eli Renate Grüner, Anders M Dale, Leif Oltedal
BACKGROUND: The utility of incorporating both diffusion information and T2 relaxation times in the imaging work-up of stroke patients is being investigated in a number of clinical trials and scientific studies. However, these tissue characteristics are often determined both qualitatively and independent of each other. PURPOSE: To investigate the feasibility of varying T2- (multi echo time [TE]) and diffusion- (multi b-value) weighting within a single series to detect differences in infarcted tissue in post-thrombectomy patients...
January 9, 2019: Acta Radiologica
Lee Chau Hung
Quantitative T2-mapping using magnetic resonance imaging (MRI) allows measurement of tissue T2-relaxation times to complement anatomical and spatial information derived from T2-weighted imaging. Studies have shown varying T2-relaxation times between prostate malignancy and non-malignant prostatic tissue. This paper aims to critically review the literature in a systematic review, to determine the usefulness of T2-mapping in the evaluation of prostate malignancy. A literature search of PubMed and Embase databases was performed...
January 8, 2019: Acta Radiologica
Johann-Martin Hempel, Malte Niklas Bongers, Katharina Braun, Ulrike Ernemann, Georg Bier
BACKGROUND: The novel advanced modeled iterative reconstruction (ADMIRE) algorithm in ultra-high-resolution (UHR) computed tomography (CT) of the temporal bone has not yet been systematically evaluated. PURPOSE: To assess the potential of ADMIRE in temporal bone UHR CT. MATERIAL AND METHODS: Forty-four patients who underwent UHR CT of the temporal bone using z-axis UHR protocol were retrospectively selected for analysis. Images were reconstructed using filtered back projection (FBP) and ADMIRE with multiple strength levels...
January 8, 2019: Acta Radiologica
Jieun Koh, Ah Young Park, Kyung Hee Ko, Sewha Kim, Hae Kyoung Jung
BACKGROUND: Magnetic resonance imaging (MRI) is largely used for preoperative evaluation of breast cancer. PURPOSE: The aim of this study is to evaluate inter-observer variability for measuring the sizes of non-mass enhancement (NME) breast cancers on various sequences of MRI and to compare with pathology size. MATERIAL AND METHODS: From January 2013 to April 2017, 70 breast cancers in 70 women showed NME on preoperative MRI. Three observers retrospectively measured the cancers with the longest diameters on subtracted early dynamic contrast-enhanced (DCE) T1 (early T1), delayed DCE T1 (delayed T1), and maximum intensity projection (MIP) images; the measurements between observers were analyzed using the intraclass correlation coefficient (ICC)...
January 8, 2019: Acta Radiologica
Iben R Andersen, Kennet Thorup, Michael B Andersen, Rene Olesen, Frank V Mortensen, Dennis T Nielsen, Finn Rasmussen
BACKGROUND: The morphological changes seen during treatment with regorafenib represent challenges when evaluating treatment response using RECIST. Computed tomography texture analysis (CTTA) has potential as a non-invasive functional imaging biomarker during treatment with anti-angiogenetic therapies. PURPOSE: To explore changes in three-dimensional tumor CTTA in colorectal liver metastases (CRLM) in a cohort of patients with metastatic colorectal cancer during treatment with regorafenib...
January 6, 2019: Acta Radiologica
Uli Fehrenbach, Johannes Kahn, Ute Fahlenkamp, Alexander Baur, Marianne Pavel, Dominik Geisel, Timm Denecke
BACKGROUND: Gadoxetic acid (Gd-EOB) has shown its advantages in hepatic tumor evaluation besides its disadvantages in extrahepatic staging due to its short hemodynamic interval. This results in the dilemma of which contrast agent to choose for whole abdominal magnetic resonance imaging (MRI). PURPOSE: To evaluate the achievable contrast of a shuttle protocol for Gd-EOB MRI with accelerated 3D-T1-weighted sequences enabling complete dynamic liver imaging plus first-pass pelvic imaging...
December 12, 2018: Acta Radiologica
Benjamin Beland, Mark Levental, Ashok Srinivasan, Reza Forghani
BACKGROUND: There are variations in computed tomography (CT) protocols used for evaluating sialolithiasis, with some protocols including acquisitions before and after IV contrast administration. Dual-energy CT (DECT) can be used to generate virtual unenhanced (VUE) images, potentially precluding the need for an uninfused scan. PURPOSE: In this study, we performed a survey in order to assess variations in the imaging approach for sialolithiasis and evaluated the accuracy of DECT VUE images for the detection of salivary stones...
December 12, 2018: Acta Radiologica
Edyta Maj, Katarzyna Wójtowicz, Aleksandra, Podlecka-Piȩtowska, Marek Prokopienko, Andrzej Marchel, Olgierd Rowiński, Monika Bekiesińska-Figatowska
The development of magnetic resonance imaging (MRI) has led to an increasingly frequent detection of changes in the spinal cord. The most common intramedullary lesions are: demyelinating; vascular; inflammatory; infectious; and congenital, largely called tumor-like lesions. Spinal cord tumors are relatively rare, as compared with brain tumors. The hardest task is to conclude whether the spinal cord lesion is a tumor or a tumor-like lesion. This review is intended to help evaluate the spinal cord and gives an overview of the tumor-like lesions occurring in the spinal cord along with their characteristic...
December 11, 2018: Acta Radiologica
Yoon-Jin Kim, Ioannis Sechopoulos, Mary S Newell, Christopher P Ho, Anna I Holbrook, Margaret Fleming, Marae B Hamlin, Priyanka Handa, Nikolay Braykov, Carl J D'Orsi
BACKGROUND: Although digital breast tomosynthesis (DBT) may be an effective breast cancer screening modality, alternatives are important to explore as this technique presents some challenges for population screening implementation. PURPOSE: To compare the detection performance of three-view (craniocaudal [CC] + mediolateral oblique [MLO] + mediolateral/lateromedial [ML/LM]) digital mammography (DM) to two-view (CC + MLO) DBT. MATERIAL AND METHODS: In this institutional review board-approved study, recalled screening DBT exams from 3 March 2014 to 31 March 2015 with a ML/LM view acquired within 30 days were retrospectively reviewed for detection of breast cancer...
December 10, 2018: Acta Radiologica
Jin Young Kim, Young Joo Suh, Kyungsun Nam, Byoung Wook Choi
BACKGROUND: Lung cancers are occasionally detected on coronary artery calcium (CAC)-scoring computed tomography (CT). However, the cause of delayed diagnosis and prognostic factors have not been studied. PURPOSE: To investigate the causes of delayed diagnosis of lung cancer in patients who undergo CAC-scoring CT and to identify predictors of mortality. MATERIAL AND METHODS: A total of 151 patients who were diagnosed with lung cancer and had undergone CAC-scoring CT from January 2010 to December 2014 were retrospectively enrolled...
November 30, 2018: Acta Radiologica
Wen-Qing Shi, Jia-Xiang Liu, Qing Yuan, Lei Ye, Ting Su, Nan Jiang, Qi Lin, You-Lan Min, Biao Li, Pei-Wen Zhu, Xiao-Wei Xu, Yi Shao
BACKGROUND: Corneal ulcer (CU) is the second ocular disease leading to blindness. Millions of people around the world suffer from CU. However, the relationship between CU and altered functional connectivity in the brain is still unknown. PURPOSE: The aim of the present study was to investigate the alterations of the brain interhemispheric functional connectivity (FC) in patients with CU using the voxel-mirrored homotopic connectivity (VMHC) method and their relationship with clinical manifestations...
November 27, 2018: Acta Radiologica
Xiao Dong Ji, Shuo Yan, Shuang Xia, Yu Guo, Wen Shen
BACKGROUND: Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is widely used for the diagnosis and prognostic assessment of head and neck squamous cell carcinoma (HNSCC). However, no research on grading HNSCC using DCE-MRI has been found. We hypothesize that DCE-MRI can grade the HNSCC non-invasively. PURPOSE: To verify the hypothesis that DCE-MRI can grade the HNSCC non-invasively. MATERIAL AND METHODS: Forty-two patients with histopathologically proved HNSCC from September 2013 to February 2016 were retrospectively analyzed...
November 20, 2018: Acta Radiologica
Ming-Hui Song, Yan-Fang Jin, Jin-Song Guo, Lili Zuo, Hong Xie, Kaining Shi, Yun-Long Yue
BACKGROUND: Intravoxel incoherent motion (IVIM) parameters derived from iZOOM diffusion-weighted imaging (DWI) can be used to quantitatively identify malignant thyroid nodules. However, the criteria are not standardized. PURPOSE: To determine IVIM parameter values derived from iZOOM DWI that can differentiate malignant from benign thyroid nodules. MATERIAL AND METHODS: Forty-two patients with 46 pathologically confirmed thyroid nodules. All patients underwent preoperative examinations with conventional and iZOOM DWI...
November 20, 2018: Acta Radiologica
Lihua Chen, Tao Ren, Panli Zuo, Yingxin Fu, Shuang Xia, Wen Shen
BACKGROUND: Detecting renal allografts with impaired function early after renal transplantation and timely intervention are important to ensure a successful outcome. PURPOSE: To detect impaired function of renal allografts at the early stage after renal transplantation using intravoxel incoherent motion imaging (IVIM). MATERIAL AND METHODS: Forty-six recipients with good allograft function and 32 recipients with impaired function were included in this study...
November 17, 2018: Acta Radiologica
Nils E Kløw, Ole J Grøtta, Dag Bay, Gunnar Sandbæk, Truls E Bjerklund Johansen, Thijs Hagen, Eduard Baco
BACKGROUND: Prostatic artery embolization (PAE) has recently been described as a promising alternative treatment for lower urinary tract symptoms (LUTS) due to an enlarged, benign prostate. PURPOSE: To evaluate the safety, morbidity, and functional outcomes after PAE. MATERIAL AND METHODS: Twenty-nine consecutive patients were included. All patients had computed tomography angiography before the procedure. Microcatheters were used for selective embolization of the PAs...
November 17, 2018: Acta Radiologica
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