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Acta Radiologica

Laurence Rocher, Jean-Luc Gennisson, Jérôme Barranger, Antoine Rachas, Aline Criton, Vincent Izard, Michele Bertolloto, Marie-France Bellin, Jean-Michel Correas
BACKGROUND: Varicocele is among the most common causes of male infertility because of various mechanism, including hypoxia. PURPOSE: To evaluate testicular vascularization (TV) with ultrasensitive Doppler before and during the Valsalva maneuver (VM) and correlate TV changes to varicocele's spermatic venous reflux graduated by color Doppler. MATERIAL AND METHODS: From January to February 2016, 69 men (135 testis) referred for scrotal ultrasound were prospectively enrolled...
November 5, 2018: Acta Radiologica
Taeko Goto, Masashi Shimohira, Kengo Ohta, Kazushi Suzuki, Yusuke Sawada, Yuta Shibamoto
BACKGROUND: In coil packing for visceral artery aneurysms (VAAs), difficulties are sometimes associated with preserving the patency of the parent artery, particularly for wide-neck aneurysms. However, the double-microcatheter technique effectively prevents coil migration, while the triple-coaxial (triaxial) system is useful for reducing microcatheter kick-back. PURPOSE: To assess the feasibility of combining these two techniques in coil packing for VAAs. MATERIAL AND METHODS: Coil packing using the double-microcatheter technique and triaxial system was attempted for seven VAAs in six patients between August 2015 and January 2018...
November 5, 2018: Acta Radiologica
Andreas Julius Tulipan, Knut Håkon Hole, Ljiljana Vlatkovic, Mona-Elisabeth Revheim, Jeroen Sebastiaan Reijnen, Frode Willoch, Therese Seierstad, Wolfgang Lilleby
BACKGROUND: Focal treatment of prostate cancer recurrence is emerging and increases the demand for precision in imaging; pure detection is no longer enough and accurate localization is needed. PURPOSE: To investigate the ability of anti-1-amino-3-[18F]fluorocyclobutane-1-carboxylic acid (FACBC) PET/CT to localize radio-recurrences within the prostate, compared to multiparametric magnetic resonance imaging (mpMRI) and with histopathology as the reference standard...
October 31, 2018: Acta Radiologica
Ki Hyun Lee, Young Sup Shim, So Hyun Park, Seong Ho Park, Seung Joon Choi, Seong Yong Pak, Hyunhee Cheong
BACKGROUND: With the increasing number of computed tomography (CT) scans used for evaluation of acute abdominal pain, patient radiation exposure has increased rapidly. PURPOSE: To determine whether the diagnostic performance of half-dose abdominopelvic CT is non-inferior to that of standard-dose CT for patients with acute abdominal pain. MATERIAL AND METHODS: Ninety-eight patients with acute abdominal pain underwent dual-source abdominopelvic CT...
October 30, 2018: Acta Radiologica
Chun Xiang Tang, Chang Sheng Zhou, Uwe Joseph Schoepf, Domenico Mastrodicasa, Taylor Duguay, Anna Cline, Yan E Zhao, Li Lu, Xie Li, Shu Min Tao, Meng Jie Lu, Guang Ming Lu, Long Jiang Zhang
BACKGROUND: To diagnose pulmonary embolism (PE) in children and adults since evaluating tiny pulmonary vasculature beyond segmental level is a challenging and demanding task with thousands of images. PURPOSE: To evaluate the effect of computer-assisted detection (CAD) on acute PE on CTPA in children and young adults by readers with varying experience levels. MATERIAL AND METHODS: Six radiologists were retrospectively divided into three groups according to experience levels and assessed the CTPA studies on a per-emboli basis...
October 30, 2018: Acta Radiologica
Riitta Rautio, Melissa Rahi, Ari Katila, Jaakko Rinne
BACKGROUND: The flow-diverter stent (FD) has been proven to be a safe and efficient device in the treatment of large and giant wide-necked proximal internal carotid artery aneurysms. PURPOSE: To report the outcomes using Flow Re-Direction Endoluminal Device Junior (Fred Jr) flow diverters in the treatment of aneurysms in or distal to the circle of Willis with parent artery diameter < 2.5 mm. MATERIAL AND METHODS: All electively treated aneurysms with this FD at our institution between September 2015 and December 2016 were retrospectively reviewed...
October 25, 2018: Acta Radiologica
Iben R Andersen, Rene Olesen, Anders K Boysen, Lars H Jensen, Frank V Mortensen, Dennis T Nielsen, Finn Rasmussen
BACKGROUND: RECIST 1.1 presents challenges when evaluating treatment response to angiogenesis inhibitors. The objective response rate, when evaluating the treatment effect of regorafenib, using RECIST 1.1, is < 2% and beneficial treatment could erroneously be terminated. Dynamic contrast-enhanced computed tomography (DCE-CT) has potential as a non-invasive functional imaging biomarker, by quantifying the treatment effect of this targeted therapy. PURPOSE: To evaluate three-dimensional (3D) tumor dynamic parameters representing tumor microcirculation assessed by DCE-CT during the treatment with regorafenib in a cohort of patients with treatment-refractory metastatic colorectal cancer...
October 22, 2018: Acta Radiologica
Jing Jing Lu, Shan Pi, Feng Hua Ma, Guo Fu Zhang, Jin Wei Qiang
Background Apparent diffusion coefficients (ADCs) measured using different regions of interest (ROIs) are widely used in differentiating ovarian tumors. Purpose To evaluate the diagnostic performance of ADCs with different ROIs in differentiating borderline ovarian tumors (BOTs) from malignant ovarian tumors (MOTs). Material and Methods Thirty-five BOTs and 54 MOTs who underwent diffusion-weighted magnetic resonance imaging (MRI) were evaluated retrospectively. ADC values were independently measured using five ROI methods: round; rectangle; hot-spot; edge drawing; and five sample ROIs...
October 18, 2018: Acta Radiologica
Iben R Andersen, Kennet Thorup, Betina N Jepsen, Frank V Mortensen, Dennis T Nielsen, Finn Rasmussen
Background A major concern following ablation treatment is the risk of insufficient heating leaving vital tumor tissue at the treatment site, leading to recurrent disease and reduced survival. Dynamic contrast-enhanced computed tomography (DCE-CT) has the potential to evaluate the treatment site in an objective and standardized manner and provide a marker of recurrent disease. Purpose To evaluate the feasibility of measuring changes in the dynamic parameters of the treatment site following ablation of colorectal liver metastases, assessed by DCE-CT using a novel evaluation method, applying a circumferential semi-automated attenuation-restricted volume of interest (VOI)...
October 18, 2018: Acta Radiologica
Choong Guen Chee, Jungheum Cho, Yusuhn Kang, Youngjune Kim, Eugene Lee, Joon Woo Lee, Joong Mo Ahn, Heung Sik Kang
Background The radiographic diagnosis of osteonecrosis of the femoral head (ONFH) is challenging for radiologists. Purpose To measure the sensitivity and specificity of digital radiography for diagnosing ONFH and to evaluate the diagnostic value of the frog-leg view. Material and Methods Patients diagnosed with ONFH by magnetic resonance imaging (MRI) (n = 132) and normal controls (n = 69) were included. Two radiologists independently graded the likelihood of ONFH and subchondral fracture on radiographs...
October 16, 2018: Acta Radiologica
Xiaoyu Huang, Xiaohong Liang, Qiaoying Zhang, Dan Wang, Jianli Liu, Lingyan Zhang, Junlin Zhou
Background Glioma is the most common neoplasm that is neuroepithelial in nature. However, Spectral computed tomography (CT) has rarely been reported to detect angiogenesis in tumors. Purpose To investigate the value of multi-parameter spectral CT for the detection of angiogenesis in C6 glioma in rats. Material and Methods Fifteen male Wistar rats were seeded with C6 glioma cells in the right basal ganglia and spectral CT-enhanced scanning was performed at days 7, 10, and 14 after the C6 glioma cells were seeded...
October 15, 2018: Acta Radiologica
Anders H Elliot, Lennart Blomqvist, Arni Sigurdsson, Anna Martling, Hemming Johansson, Bengt Glimelius, Per J Nilsson
Background The performance of magnetic resonance imaging (MRI) interpretation and communication of findings and its implication on treatment decisions has not fully been explored in rectal cancer. Purpose To investigate in a region the adherence to MRI protocol standards and the relation between MRI interpretation and selection to preoperative therapy in rectal cancer. Material and Methods Data on consecutive patients who underwent elective rectal cancer surgery in the region from January to June 2010 were obtained from the National Colorectal Cancer Registry...
October 15, 2018: Acta Radiologica
Achim Seeger, Marion Batra, Daniela Süsskind, Ulrike Ernemann, Till-Karsten Hauser
Background Diffusion-weighted imaging (DWI) has become an important tool for lesion characterization. Advanced techniques of DWI may be used to improve image quality. Purpose To evaluate multi-shot segmented DWI (rs-EPI, RESOLVE) and reduced field-of view DWI (rFOV-EPI, "zoomed" EPI) in patients with ocular melanoma and to compare image quality and diagnostic performance in differentiation of melanoma from retinal detachment. Material and Methods In this prospective and IRB-approved trial, we examined 26 patients using methods including conventional single-shot echo-planar DWI (ss-EPI), rs-EPI, and rFOV-EPI...
October 15, 2018: Acta Radiologica
Hanna Markstad, Zoltan Bakos, Ellen Ostenfeld, Mats Geijer, Marcus Carlsson, Rasmus Borgquist
Background Successful cardiac resynchronization therapy (CRT) requires appropriate left ventricular (LV) lead placement on a suitable segment of the free LV wall. Current guidelines suggest targeted lead placement, but the individual anatomy of the cardiac veins is often a limiting factor. Purpose To map cardiac veins with multidetector computed tomography (MDCT) and plot the veins in cardiac segments to facilitate successful CRT implantation. Material and Methods Ninety-nine patients were included (mean age = 68 ± 9 years; 26% women; 46% ischemic cardiomyopathy)...
October 10, 2018: Acta Radiologica
Roberta Fusco, Vincenza Granata, Daniela Rega, Carolina Russo, Ugo Pace, Biagio Pecori, Fabiana Tatangelo, Gerardo Botti, Francesco Izzo, Marco Cascella, Antonio Avallone, Paolo Delrio, Antonella Petrillo
Background Although imaging can be suggestive of the diagnosis of rectal cancer, the primary imaging role is to assist in treatment triage of histologically diagnosed tumors. The possibility of a multimodal approach in the response to the treatment opens the way for the selection of criteria more personalized to the patient. Purpose To assess the prognostic factor of morphological and functional magnetic resonance imaging (MRI) in rectal cancer. Material and Methods Seventy-seven patients were enrolled and underwent MRI before treatment and 59 patients underwent MRI after treatment...
October 4, 2018: Acta Radiologica
Bo Ra Kwon, Jung Min Chang, Joongyub Lee, Sung Ui Shin, Su Hyun Lee, Nariya Cho, Woo Kyung Moon
Background Sentinel lymph node biopsy (SLNB) has been accepted as the standard treatment for axillary evaluation for invasive breast cancer with a clinically negative axilla and the low rate of recurrence after SLNB was reported. Purpose To evaluate the performance of screening ultrasound (US) for breast and axillary recurrence detection in breast cancer patients who underwent SLNB. Material and Methods We identified 2807 examinations of 562 breast cancer patients who underwent SLNB and received annual screening US combined with mammography (MG) for five years...
October 3, 2018: Acta Radiologica
So Hee Song, Woo Kyoung Jeong, Dongil Choi, Young Kon Kim, Hee Chul Park, Jeong Il Yu
Background Stereotactic body radiation therapy is an emerging treatment option for patients with unresectable advanced hepatocellular carcinoma (HCC). Because liver parenchyma neighboring the tumor is unavoidably exposed to irradiation, evaluation of treatment response following radiotherapy for HCC is challenging due to increased peritumoral arterial hyperemia and delayed clearance of contrast agent in the tumor. Purpose To explore which change of magnetic resonance imaging (MRI) features between pre- and post-radiotherapy could help evaluate viability of HCC...
October 3, 2018: Acta Radiologica
Małgorzata Piechota, Robert Król, David A Elias, Wojciech Wawrzynek, Andrzej Lekstan
Background The nerve root sedimentation sign is a magnetic resonance (MR) sign, shown to be present in central lumbar spinal stenosis. The lack of sedimentation of the nerve roots to the dorsal part of the dural sac is consistent with the positive nerve root sedimentation sign. Purpose To validate the reliability of the nerve root sedimentation sign in diagnosis of different grades of lumbar spinal canal stenosis. Material and Methods This study was a retrospective review of 101 consecutive MR imaging (MRI) studies obtained on patients with clinically suspected lumbar canal stenosis...
October 3, 2018: Acta Radiologica
Guang-Dong Lu, Jin-Xing Zhang, Chun-Gao Zhou, Jin-Guo Xia, Sheng Liu, Qing-Quan Zu, Hai-Bin Shi
Background Previous studies suggest that recurrence of hemoptysis after arterial embolization is associated with the underlying pulmonary disease. Purpose To compare the baseline information and imaging findings in patients with hemoptysis due to either chronic pulmonary tuberculosis (PTB) or bronchiectasis and to identify predictors of rebleeding after embolization treatment. Material and Methods Clinical data of all consecutive chronic PTB and bronchiectasis patients who underwent arterial embolization for hemoptysis from January 2010 to January 2017 in a single center were reviewed...
October 3, 2018: Acta Radiologica
Serafino Forte, Sophie Dellas, Bram Stieltjes, Georg Bongartz
Background Multimodal ultrasound tomography (MUT) is a promising new three-dimensional imaging technology for breast cancer detection without ionizing radiation or need for tissue compression. It offers an automatic scan of the pendulant whole breast. Purpose As breast tissue properties are affected by the menstrual cycle (MC), we examined whether there is an objective difference in the refractivity and attenuation images obtained via MUT at different phases of the menstrual cycle. Material and Methods Thirteen asymptomatic volunteers (age range = 27-44 years) with a regular MC were scanned once weekly for four weeks...
October 3, 2018: Acta Radiologica
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