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Acta Radiologica

Sung Eun Song, Min Sun Bae, Jung Min Chang, Nariya Cho, Han Suk Ryu, Woo Kyung Moon
BACKGROUND: Human epidermal growth factor receptor 2-positive (HER2+) breast cancer has two distinct subtypes according to hormone receptor (HR) status. Survival, pattern of recurrence, and treatment response differ between HR-/HER2+ and HR+/HER2+ cancers. PURPOSE: To investigate imaging and clinicopathologic features of HER2+ cancers and their correlation with HR expression. MATERIAL AND METHODS: Between 2011 and 2013, 252 consecutive patients with 252 surgically confirmed HER2+ cancers (125 HR- and 127 HR+) were included...
October 17, 2016: Acta Radiologica
Sung Jung Kim, Je Hwan Won, Young Bae Kim, Hee-Jung Wang, Bong-Wan Kim, Haeryoung Kim, Jinoo Kim
BACKGROUND: Percutaneous biopsy is a widely-accepted technique for acquiring histologic samples of the liver. When there is concern for bleeding, plugged percutaneous biopsy (PPB) may be performed, which involves embolization of the biopsy tract. PURPOSE: To evaluate the efficacy and safety of PPB of the liver in patients suspected to have graft rejection after living-donor liver transplantation (LDLT). MATERIAL AND METHODS: During January 2007 and December 2013, 51 patients who underwent PPB of the liver under the suspicion of post-LDLT graft rejection were retrospectively analyzed...
October 17, 2016: Acta Radiologica
Janis L Vahldiek, Stefan Thieme, Bernd Hamm, Stefan M Niehues
BACKGROUND: The use of computed tomography (CT) scans of the head and cervical spine has markedly increased in patients with blunt minor trauma. The actual likelihood of a combined injury of head and cervical spine following a minor trauma is estimated to be low. PURPOSE: To determine the incidence of such combined injuries in patients with a blunt minor trauma in order to estimate the need to derive improved diagnostic guidelines. MATERIAL AND METHODS: A total of 1854 patients were retrospectively analyzed...
October 17, 2016: Acta Radiologica
Da-Zhen Jiang, Ding-Yi Zhou, Wei-Qing Wu, Guang-Yao Wu, Hong Quan
BACKGROUND: Magnetic resonance imaging (MRI) and functional MRI techniques have been widely used in the diagnosis of human immunodeficiency virus (HIV) infection related diseases. PURPOSE: To explore whether magnetic resonance diffusion-weighted imaging (DWI) can track water molecular diffusion changes in the brain of asymptomatic HIV-positive adolescents. MATERIAL AND METHODS: Multi-b value DWI was performed in 23 adolescents, including 15 HIV-positive participants and eight HIV-negative healthy participants...
October 12, 2016: Acta Radiologica
Eli Eikefjord, Erling Andersen, Erlend Hodneland, Erik A Hanson, Steven Sourbron, Einar Svarstad, Arvid Lundervold, Jarle T Rørvik
BACKGROUND: High repeatability, accuracy, and precision for renal function measurements need to be achieved to establish renal dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) as a clinically useful diagnostic tool. PURPOSE: To investigate the repeatability, accuracy, and precision of DCE-MRI measured renal perfusion and glomerular filtration rate (GFR) using iohexol-GFR as the reference method. MATERIAL AND METHODS: Twenty healthy non-smoking volunteers underwent repeated DCE-MRI and an iohexol-GFR within a period of 10 days...
September 30, 2016: Acta Radiologica
Jiaywei Tsauo, Moon-Won Yoo, Jung-Hoon Park, Ho-Young Song, Eun Jung Jun, Young Chul Cho, Guk Bae Kim
BACKGROUND: Self-expandable metallic stent (SEMS) placement is a well-established palliative treatment approach for malignant gastroduodenal obstruction. In patients with a long (>10 cm) stricture, multiple stents placed in an overlapping fashion are often required. PURPOSE: To investigate the outcomes of overlapping SEMS placement for the palliative treatment of malignant gastroduodenal obstruction in patients with a long (>10 cm) stricture. MATERIAL AND METHODS: The medical records of 40 patients who underwent fluoroscopic overlapping SEMS placement for malignant gastroduodenal obstruction due to a long (>10 cm) stricture were reviewed...
September 28, 2016: Acta Radiologica
Karin Persson, Geir Selbæk, Anne Brækhus, Mona Beyer, Maria Barca, Knut Engedal
BACKGROUND: The dementia syndrome has been regarded a clinical diagnosis but the focus on supplemental biomarkers is increasing. An automatic magnetic resonance imaging (MRI) volumetry method, NeuroQuant® (NQ), has been developed for use in clinical settings. PURPOSE: To evaluate the clinical usefulness of NQ in distinguishing Alzheimer's disease dementia (AD) from non-dementia and non-AD dementia. MATERIAL AND METHODS: NQ was performed in 275 patients diagnosed according to the criteria of ICD-10 for AD, vascular dementia and Parkinson's disease dementia (PDD); the Winblad criteria for mild cognitive impairment; the Lund-Manchester criteria for frontotemporal dementia; and the revised consensus criteria for Lewy body dementia (LBD)...
September 28, 2016: Acta Radiologica
Youichi Machida, Akiko Shimauchi, Yoshifumi Kuroki, Mitsuhiro Tozaki, Yoshiaki Kato, Kazuei Hoshi, Eisuke Fukuma
BACKGROUND: Because of its small size, a focus in breast magnetic resonance imaging (MRI) must be evaluated on the basis of characteristics other than morphologic features. Patient-related factors including patient age, in conjunction with lesion-related factors, could be useful for decision-making. PURPOSE: To assess the probability of malignant foci based on both lesion- and patient-related factors, and to propose a relevant decision-making method. MATERIAL AND METHODS: Foci in our breast MRI database dating from April 2006 to June 2013 were retrospectively identified and analyzed...
September 23, 2016: Acta Radiologica
Vibhor Wadhwa, Aws S Hamid, Yogesh Kumar, Kelly M Scott, Avneesh Chhabra
Pudendal neuralgia is being increasingly recognized as a cause of chronic pelvic pain, which may be related to nerve injury or entrapment. Due to its complex anatomy and branching patterns, the pudendal nerve abnormalities are challenging to illustrate. High resolution 3 T magnetic resonance neurography is a promising technique for the evaluation of peripheral neuropathies. In this article, the authors discuss the normal pudendal nerve anatomy and its variations, technical considerations of pudendal nerve imaging, and highlight the normal and abnormal appearances of the pudendal nerve and its branches with illustrative case examples...
September 23, 2016: Acta Radiologica
Vuslat Lale Bakir, Baris Bakir, Sükrü Sanli, Sevda Ozel Yildiz, Ahmet Cem Iyibozkurt, Merve Gülbiz Kartal, Ekrem Yavuz
BACKGROUND: Many publications have examined the relationship between apparent diffusion coefficient (ADC) values and tumor grade in endometrial cancer. Nevertheless, none were designed to evaluate according to the histopathological type of endometrioid and non-endometrioid tumors. PURPOSE: To evaluate the role of diffusion-weighted imaging (DWI) in the differential diagnosis of endometrioid and non-endometrioid cancer of the uterus, by comparing them with contrast-enhanced magnetic resonance imaging (MRI) findings...
September 23, 2016: Acta Radiologica
Caroline Clausen, Benny Dahl, Susanne Christiansen Frevert, Julie Lyng Forman, Michael Bachmann Nielsen, Lars Lönn
BACKGROUND: Preoperative embolization is based on the preoperative digital subtraction angiography (DSA) tumor blush, and as such is considered the "gold standard" for determining tumor vascularity. However, to our knowledge reliability studies evaluating vascularity ratings of DSA tumor blush in spinal metastases have not been published previously. PURPOSE: To evaluate inter- and intra-rater agreement in the assessment of the vascularity of spinal metastases using DSA tumor blush...
September 20, 2016: Acta Radiologica
Zhongyi Chen, Irina Boldeanu, Simon Nepveu, Madeleine Durand, Anne S Chin, Claude Kauffmann, Samer Mansour, Gilles Soulez, Cécile Tremblay, Carl Chartrand-Lefebvre
BACKGROUND: Coronary computed tomography angiography (CTA) allows the evaluation of coronary plaque volume and low attenuation (lipid-rich) component, for plaque vulnerability assessment. PURPOSE: To determine the effect of iterative reconstruction (IR) on coronary plaque volume and composition. MATERIAL AND METHODS: Consecutive patients without coronary artery disease were prospectively enrolled for 256-slice CT. Images were reconstructed with both filtered back projection (FBP) and a hybrid IR algorithm (iDose(4), Philips) levels 1, 3, 5, and 7...
September 19, 2016: Acta Radiologica
Juliano Lara Fernandes, Luciana Andrea Barozi Fioravante, Monica P Verissimo, Sandra R Loggetto
BACKGROUND: Iron overload assessment with magnetic resonance imaging (MRI) using T2* has become a key diagnostic method in the management of many diseases. Quantitative analysis of the MRI images with a cost-effective tool has been a limitation to increased use of the method. PURPOSE: To provide a free software solution for this purpose comparing the results with a commercial solution. MATERIAL AND METHODS: The free tool was developed as a standalone program to be directly downloaded and ran in a common personal computer platform without the need of a dedicated workstation...
September 10, 2016: Acta Radiologica
Kirsi Miettunen, Eija Metsälä
BACKGROUND: The purpose of clinical audits performed in radiology units is to reduce the radiation dose of patients and staff and to implement evidence-based best practices. PURPOSE: To describe auditor recommendations in three Finnish clinical audit rounds performed in 2002-2014, and to determine if auditor recommendations have had any impact on improving medical imaging practice. MATERIAL AND METHODS: The retrospective observational study was performed in radiology units holding a radiation safety license issued by the Finnish Radiation and Nuclear Safety Authority...
September 10, 2016: Acta Radiologica
Leif-Christopher Engel, Wai-Ee Thai, Hector Medina-Zuluaga, Mihaly Karolyi, Manavjot S Sidhu, Pal Maurovich-Horvat, Ronan Margey, Eugene Pomerantsev, Suhny Abbara, Brian B Ghoshhajra, Udo Hoffmann, Gary Y Liew
BACKGROUND: Heavy coronary artery calcification (CAC) impairs diagnostic accuracy of coronary computed tomography angiography (cCTA) and is considered to be a major limitation. PURPOSE: To investigate the effect of non-evaluable CAC seen on cCTA on clinical decision-making by determining the degree of subsequent invasive testing and to assess the relationship between non-evaluable segments containing CAC and significant stenosis as seen in invasive coronary angiography (ICA)...
September 10, 2016: Acta Radiologica
Henrik S Thomsen
No abstract text is available yet for this article.
September 8, 2016: Acta Radiologica
Pirita Tahvonen, Heljä Oikarinen, Jaakko Niinimäki, Esa Liukkonen, Seija Mattila, Osmo Tervonen
BACKGROUND: Spinal disorders are a major public health problem. Appropriate diagnostic imaging is an essential part in the management of back complaints. Nevertheless, inappropriate imaging increases population collective dose and health costs without improving outcome. PURPOSE: To determine the effects of active implementation of referral guidelines on the number and justification of spine radiography in primary care in one city. MATERIAL AND METHODS: Specified guidelines for spine radiography were distributed to referring practitioners altogether three times during the study period...
September 8, 2016: Acta Radiologica
Meeyoung Nam, Han-Seong Jeong, Jung Hee Shin
BACKGROUND: Parathyroid carcinomas (PTC) are very rare. There have been a few studies on the contribution of ultrasound (US) in the diagnosis of PTC compared with parathyroid adenomas (PTA). PURPOSE: To identify the differences between US findings of PTC and PTA in patients with primary hyperparathyroidism (PHPT). MATERIAL AND METHODS: We enrolled seven patients with PTC and 32 consecutive patients with PTA whose diagnoses were confirmed by surgery at our institution between March 1994 and June 2015...
September 8, 2016: Acta Radiologica
Caterina Gaudiano, Riccardo Schiavina, Valerio Vagnoni, Fiorenza Busato, Marco Borghesi, Marco Bandini, Maddalena Di Carlo, Eugenio Brunocilla, Giuseppe Martorana, Rita Golfieri
BACKGROUND: Small renal masses (SRMs; ≤4 cm) represent a challenging issue. Computed tomography (CT) is widely used for investigating renal tumors even if its ability to differentiate among the different subtypes has not yet been definitively established. PURPOSE: To assess the potential role of the morphological features and angiodynamic behavior on multiphasic CT in the preoperative evaluation of SRMs. MATERIAL AND METHODS: The CT images of 80 patients with SRMs who underwent surgical resection at our institution were retrospectively reviewed...
September 6, 2016: Acta Radiologica
Leilei Yuan, Jun Liu, Ying Kan, Jigang Yang, Xufu Wang
BACKGROUND: 99mTc-sestamibi (MIBI) parathyroid SPECT is generally regarded as the best preoperative localizing method in patients with hyperparathyroidism (HPT). However, 99mTc-MIBI SPECT is false negative in approximately 25% of adenomas. 11C-methionine positron emission tomography (PET) has been used in HPT with negative 99mTc-MIBI SPECT scan results. PURPOSE: To systematically review and conduct a meta-analysis of published data on the performance of 11C-methionine PET in patients with HPT with negative 99mTc-MIBI SPECT...
September 2, 2016: Acta Radiologica
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