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Acta Radiologica

Woo Jung Choi, Youyeon Kim, Joo Hee Cha, Hee Jung Shin, Eun Young Chae, Ga Young Yoon, Hak Hee Kim
BACKGROUND: High levels of tumor-infiltrating lymphocytes (TILs) are associated with improved prognosis and response to therapy in patients with human epidermal growth factor receptor 2 (HER2)-positive breast cancer. PURPOSE: This study investigated the associations between TIL levels and magnetic resonance imaging (MRI) findings in patients with estrogen receptor (ER)-negative HER-2 positive breast cancer. MATERIAL AND METHODS: This study included 110 consecutive patients with surgically confirmed ER-negative HER2-positive breast cancers who underwent preoperative MRI from January to December 2015...
May 20, 2019: Acta Radiologica
Philippe Braconnier, Maciej Piskunowicz, Nima Vakilzadeh, Marie-Eve Müller, Emilie Zürcher, Michel Burnier, Menno Pruijm
BACKGROUND: Renal length, volume, and parenchymal thickness are important clinical parameters, yet data concerning the accuracy and reproducibility of ultrasound (US)-based renal length and volume assessment in patients with chronic kidney disease (CKD) are scarce. PURPOSE: To establish whether renal length, volume, and parenchymal thickness can be reliably measured with renal US in patients with CKD. MATERIAL AND METHODS: All participants underwent renal US, immediately followed by 3-T magnetic resonance imaging (MRI)...
May 15, 2019: Acta Radiologica
Samuel Kuttner, Martin Lyngby Lassen, Silje Kjærnes Øen, Rune Sundset, Thomas Beyer, Live Eikenes
BACKGROUND: Positron emission tomography (PET)/magnetic resonance (MR) imaging may become increasingly important for assessing tumor therapy response. A prerequisite for quantitative PET/MR imaging is reliable and repeatable MR-based attenuation correction (AC). PURPOSE: To investigate the frequency and test-retest reproducibility of artifacts in MR-AC maps in a lung cancer patient cohort and to study the impact of artifact corrections on PET-based tumor quantification...
May 15, 2019: Acta Radiologica
Alexandra S Berghe, Simona C Şenilă, Liliana Rogojan, Lavinia M Lenghel, Sorana D Bolboacă, Carolina M Solomon
BACKGROUND: Cutaneous melanoma is the most deadly of skin neoplasms. Few studies have investigated the role of elastography characteristics so the ability of elastography in the differentiation of thin and thick cutaneous melanoma is still narrow. PURPOSE: To investigate the accuracy of elastography in differentiating thin and thick melanoma, by measuring strain ratio (SR) between the lesion and adjacent dermis and hypodermis. MATERIAL AND METHODS: We investigated by ultrasound and elastography 52 melanoma lesions in 49 patients...
May 15, 2019: Acta Radiologica
Mohammad Abd Alkhalik Basha, Sameh Saber, Ahmed A El-Hamid M Abdalla, Sameh Abdelaziz Aly, T GObran, Amira Waly, Ahmed Salah Arafa
BACKGROUND: Knowing transient vascular perfusion abnormalities of testes after open inguinal herniotomy procedure is essential for the surgeon who is mainly responsible for the patient outcome. PURPOSE: To assess the effect of open inguinal herniotomy procedure on the testicular blood supply in children using duplex ultrasonography (DUS). MATERIAL AND METHODS: A prospective observational study included 60 boys (mean age = 9.46 ± 14...
May 15, 2019: Acta Radiologica
Zlatan Alagic, Haris Alagic, Robert Bujila, Subhash Srivastava, Saif Jasim, Maria Lindqvist, Marius C Wick
BACKGROUND: The use of computed tomography (CT) for image guidance during biopsies is a powerful approach. The method is, however, often associated with a significant level of radiation exposure to the patient and operator. PURPOSE: To investigate if a low-dose protocol for CT-guided musculoskeletal (MSK) biopsies, including a combination of different radiation dose (RD) techniques, is feasible in a clinical setting. MATERIAL AND METHODS: Fifty-seven patients underwent CT-guided fine-needle aspiration cytology (FNAC) utilizing the low-dose protocol (group A)...
May 15, 2019: Acta Radiologica
Pei-Wen Zhu, You Chen, Ying-Xin Gong, Nan Jiang, Wen-Feng Liu, Ting Su, Lei Ye, You-Lan Min, Qing Yuan, Lai-Chang He, Yi Shao
BACKGROUND: Neuroimaging studies revealed that trigeminal neuralgia was related to alternations in brain anatomical function and regional function. However, the functional characteristics of network organization in the whole brain is unknown. PURPOSE: The aim of the present study was to analyze potential functional network brain-activity changes and their relationships with clinical features in patients with trigeminal neuralgia via the voxel-wise degree centrality method...
May 14, 2019: Acta Radiologica
Zhen Xing, Hua Zhang, Dejun She, Yu Lin, Xiaofang Zhou, Zheng Zeng, Dairong Cao
BACKGROUND: Isocitrate dehydrogenase (IDH) mutation has diagnostic and prognostic values in glioblastomas. Peritumoral invasion of glioma cells is a cardinal feature of glioblastomas. PURPOSE: To evaluate the contribution of DWI and DSC-PWI in the enhancing and peri-enhancing region for discriminating glioblastomas IDH genotypes, and the diagnostic values of combining two techniques in the peri-enhancing region compared with those in the enhancing region. MATERIAL AND METHODS: We retrospectively reviewed the conventional MRI (cMRI), DWI and DSC-PWI obtained from 10 patients with IDH-mutated (IDH-m) glioblastomas and 65 patients with IDH wild-type (IDH-w) glioblastomas...
May 13, 2019: Acta Radiologica
Nathan Heineman, George Liu, Thomas Pacicco, Riham Dessouky, Dane K Wukich, Avneesh Chhabra
Hallux valgus is a common condition estimated to affect as many as 23% of adults. The condition is associated with a variety of debilitating symptoms leading to significant morbidity and quality of life issues. Proper evaluation of this deformity and the timely management of its symptoms can improve hallux valgus-related symptomatology and quality of life. The most commonly used and readily reproduced measurements for assessing hallux valgus are the inter-metatarsal angle and the hallux valgus angle. These angles are helpful for choosing and planning surgical intervention for patients who fail initial conservative measures with distal osteotomies reserved for mild or moderate hallux valgus and proximal osteotomies indicated for more moderate to severe deformities...
May 13, 2019: Acta Radiologica
So Yeon Yang, Jung Hee Shin, Soo Yeon Hahn, Yaeji Lim, Seok Young Hwang, Tae Hyuk Kim, Jee Soo Kim
BACKGROUND: Indications for computed tomography (CT) in preoperative patients with thyroid cancer are still controversial. PURPOSE: To determine the value of CT and ultrasonography (US) in preoperative lymph node assessment of patients with papillary thyroid carcinoma (PTC) according to primary tumor size. MATERIAL AND METHODS: A total 453 patients with surgically proven PTC who underwent US and CT for preoperative evaluation in 2010 at our tertiary referral center were included...
May 13, 2019: Acta Radiologica
Heejin Bae, Dae Chul Jung, Jung-Yun Lee, Eun Ji Nam, Won Jun Kang, Young Taik Oh
BACKGROUND: In order to obtain timely treatment, the early detection of recurrent ovarian cancer is essential. Despite technical advances in multi-detector row computed tomography (MDCT), low sensitivity of CT for recurrence has not been improved much due to its poor soft tissue discrimination. PURPOSE: The aim of this study is to describe patterns of erroneous postoperative MDCT interpretation of recurred peritoneal lesions in patients with advanced ovarian cancer (AOC)...
May 12, 2019: Acta Radiologica
Yitong Yu, Weihua Yin, Kai Liao, Ting Liu, Ximing Wang, Kai Sun, Bin Lu
BACKGROUND: The degree of intravascular enhancement influences the diagnosis of plaque in coronary computed tomography angiography (CTA). PURPOSE: To evaluate whether the protocol tailored to body surface area (BSA) achieving identical enhancement in different habitus patients receiving different concentration contrast agents (CA) in coronary CTA. MATERIAL AND METHODS: Patients undergoing coronary CTA randomly received a different concentration of CA with a protocol adapted to BSA...
May 12, 2019: Acta Radiologica
Eun Soo Kim, Dae Young Yoon, Hye Jeong Kim, Kwanseop Lee, Yerim Kim, Jong Seok Bae, Ju-Hun Lee
BACKGROUND: Alternative metrics (Altmetrics) based on mentions in online media is a new tool that can help identify articles that have the most influence on diverse public audiences. PURPOSE: To determine the 100 most mentioned articles in the field of neuroimaging and to analyze their characteristics. MATERIAL AND METHODS: We selected the 668 journals that were considered to potentially publish neuroimaging articles. Using the search tool, we identified the 100 most mentioned neuroimaging articles based on the highest Altmetric Attention Scores (AAS) within selected journals...
May 1, 2019: Acta Radiologica
Ran Kim, Woo Kyoung Jeong, Tae Wook Kang, Kyoung Doo Song, Min Woo Lee, Soo Hyun Ahn, Hyunchul Rhim
BACKGROUND: Portal hypertension might be used as a predictor for recurrence of hepatocellular carcinoma (HCC). The aim of this study was to determine whether the degree of portal hypertension assessed by computed tomography (CT) findings predicts intrahepatic distant recurrence (IDR) in patients with HCC after radiofrequency ablation (RFA). MATERIAL AND METHODS: This retrospective study was approved by the institutional review board. A total of 78 patients who received transient elastography before RFA were included...
May 1, 2019: Acta Radiologica
So Yeon Lee, Yoon Jung Choi, Hee Jin Park, Shin Ho Kook, Kyung A Kang, Mi Sung Kim, Heon Ju Kwon, Jin Hwan Ahn
BACKGROUND: It is unknown whether a selective-bundle tear of the anterior cruciate ligament (ACL) shows a different prevalence of posterolateral corner (PLC) injury than a both-bundle tear. PURPOSE: The prevalence of injury of PLC stabilizer in relation to the type of combined ACL tear (both-bundle and selective-bundle tears) has been investigated. MATERIAL AND METHODS: This retrospective study included 94 patients who were diagnosed with an ACL tear after knee joint magnetic resonance imaging and underwent arthroscopic surgery...
May 1, 2019: Acta Radiologica
Bi Cong Yan, Mei Ling Xiao, Ying Li, Jin Wei Qiang
BACKGROUND: Disputes exist regarding whether the apparent diffusion coefficient (ADC) can differentiate the tumor grade, deep myometrial invasion and lymphovascular space invasion (LVSI) in endometrial cancer. The aim of this review was to assess the diagnostic performance of the ADC value in endometrial cancer. MATERIAL AND METHODS: The PubMed, Web of Science, Embase and Cochrane Library databases were searched for studies that used the ADC value to assess tumor grade, deep myometrial invasion and LVSI in endometrial cancer...
May 1, 2019: Acta Radiologica
Thomas Eriksson, Gerald Q Maguire, Marilyn E Noz, Michael P Zeleznik, Henrik Olivecrona, Adel Shalabi, Mari Hänni
BACKGROUND: Computed tomography (CT) has the potential to acquire the data needed for migration studies of orthopedic joint implants of patients who have had tantalum beads implanted at the time of joint replacement surgery. This can be accomplished with the same precision as radiostereometric analysis (RSA). Switching to CT would increase availability without the need for the specific facilities required for RSA. However, higher effective dose is a concern. PURPOSE: To investigate if migration measurements can be done with CT with an accuracy and effective dose comparable to that of conventional RSA...
May 1, 2019: Acta Radiologica
De-Jun She, Yi-Ping Lu, Ji Xiong, Dai-Rong Cao, Dao-Ying Geng, Bo Yin
BACKGROUND: The differentiation of infratentorial ganglioglioma and pilocytic astrocytoma may be therapeutically relevant, which is sometimes challenging to both pathologists and neuroradiologists. PURPOSE: To evaluate the conventional magnetic resonance imaging (MRI), diffusion-weighted imaging (DWI), and dynamic susceptibility contrast-enhanced perfusion weighted imaging (DSC-PWI) features of infratentorial ganglioglioma compared with pilocytic astrocytoma. MATERIAL AND METHODS: This retrospective study enrolled 12 patients with infratentorial ganglioglioma and 61 patients with pilocytic astrocytoma who underwent MRI before surgery...
April 29, 2019: Acta Radiologica
Chang De-Hua, Pracros Jean-Pierre
BACKGROUND: To date, few data on the safety profile of gadoterate meglumine in pediatric patients are available. PURPOSE: To assess the safety profile of gadoterate meglumine in routine practice, to detect any case of nephrogenic systemic fibrosis (NSF) suspicion and to collect efficacy data. MATERIAL AND METHODS: The pediatric population of the observational SECURE study comprised 1631 patients scheduled for contrast-enhanced magnetic resonance imaging (MRI) with gadoterate meglumine (dose: 0...
April 26, 2019: Acta Radiologica
Si-Min Wen, You-Lan Min, Qing Yuan, Biao Li, Qi Lin, Pei-Wen Zhu, Wen-Qing Shi, Yong-Qiang Shu, Yi Shao, Qiong Zhou
BACKGROUND: Retinal vein occlusion (RVO) is among the commonest retinal vascular conditions that can cause severe visual loss. However, the relationship between RVO and altered spontaneous brain activity is still unknown. PURPOSE: To apply regional homogeneity (ReHo) for the evaluation of abnormal brain activity in patients with RVO and explore the relationship between anomalous cerebral activity and behavioral manifestations. MATERIAL AND METHODS: Resting-state functional magnetic resonance imaging (rs-fMRI) was performed in 26 patients with RVO (12 men, 14 women) and 24 healthy controls (12 men, 12 women) matched by age, sex, and education...
April 25, 2019: Acta Radiologica
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