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Acta Radiologica

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https://www.readbyqxmd.com/read/28330373/readout-segmented-echo-planar-diffusion-weighted-imaging-in-the-assessment-of-orbital-tumors-comparison-with-conventional-single-shot-echo-planar-imaging-in-image-quality-and-diagnostic-performance
#1
Xiaoquan Xu, Yanjun Wang, Hao Hu, Guoyi Su, Hu Liu, Haibin Shi, Feiyun Wu
Background Readout-segmented echo-planar imaging (RS-EPI) could improve the imaging quality of diffusion-weighted imaging (DWI) in various organs. However, whether it could improve the imaging quality and diagnostic performance for the patients with orbital tumors is still unknown. Purpose To compare the image quality and diagnostic performance of RS-EPI DWI with that of conventional single-shot EPI (SS-EPI) DWI in patients with orbital tumors. Material and Methods SS-EPI and RS-EPI DW images of 32 patients with pathologically diagnosed orbital tumors were retrospectively analyzed...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28304179/discrepancy-in-fetal-head-biometry-between-ultrasound-and-mri-in-suspected-microcephalic-fetuses
#2
Gal Yaniv, Eldad Katorza, Vered Tsehmaister Abitbol, Arik Eisenkraft, Ronen Bercovitz, Salim Bader, Chen Hoffmann
Background Microcephaly is one of the most common fetal structural abnormalities, and prenatal microcephaly is considered a group I malformation of cortical development diagnosed according to ultrasound (US) skull measurements. Purpose To evaluate the agreement between fetal head US and magnetic resonance imaging (MRI) biometric measurements of suspected microcephalic fetuses. Material and Methods This institutional review board-approved retrospective study with waived informed consent included 180 pregnant women and was conducted at our medical center from March 2011 to April 2013...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28292199/high-resolution-mri-of-the-ulnar-and-radial-collateral-ligaments-of-the-wrist
#3
Taiki Nozaki, Wei Der Wu, Yasuhito Kaneko, Gregory Rafijah, Lily Yang, Dave Hitt, Hiroshi Yoshioka
Background Accurate diagnosis of injuries to the collateral ligaments of the wrist is technically challenging on MRI. Purpose To investigate usefulness of high-resolution two-dimensional (2D) and isotropic three-dimensional (3D) magnetic resonance imaging (MRI) for identifying and classifying the morphology of the ulnar and radial collateral ligaments (UCL and RCL) of the wrist. Material and Methods Thirty-seven participants were evaluated using 3T coronal 2D and isotropic 3D images by two radiologists independently...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28286981/shear-wave-ultrasound-elastography-of-the-liver-in-normal-weight-and-obese-children
#4
Smita Sane Bailey, Mostafa Youssfi, Mittun Patel, Houchun H Hu, Gabriel Q Shaibi, Richard B Towbin
Background The identification and subsequent management of liver diseases in children is challenging due to the lack of non-invasive imaging biomarkers. Ultrasound shear-wave elastography (US-SWE) is an emerging imaging technique which can quantitatively assess liver stiffness and may be useful as a tool in the management of liver disease in overweight and obese children. Purpose To evaluate US-SWE velocities of the liver in normal-weight and obese children, to correlate US-SWE findings with age and body-mass-index (BMI), and to compare US-SWE values with qualitative assessment (i...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28286980/differentiation-of-prostate-cancer-and-stromal-hyperplasia-in-the-transition-zone-with-histogram-analysis-of-the-apparent-diffusion-coefficient
#5
Liu Xiaohang, Zhou Bingni, Zhou Liangping, Peng Weijun, Yang Xiaoqun, Zhang Yong
Background Prostate cancer and stromal hyperplasia (SH) in the transition zone (TZ) are difficult to discriminate by conventional magnetic resonance imaging (MRI) and diffusion-weighted imaging (DWI). Purpose To investigate the apparent diffusion coefficient (ADC) of prostate cancer and SH in the TZ with histogram analysis and the ability of ADC metrics to differentiate between these two tissues. Material and Methods Thirty-three cancer and 29 SH lesions in the TZ of 54 patients undergoing preoperative DWI (b-value 0, 1000 s/mm(2)) were analyzed...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28286979/the-value-of-preoperative-computed-tomography-combined-with-ultrasound-in-the-investigation-of-small-indeterminate-liver-lesions-in-patients-with-colorectal-cancer
#6
Mirna Abraham-Nordling, Emma Öistämö, Thomas Josephson, Fredrik Hjern, Lennart Blomqvist
Background Computed tomography (CT) is used routinely for the preoperative detection of colorectal cancer (CRC) metastases. When small indeterminate focal liver lesions are detected that are too small to characterize (TSTC) on CT, additional imaging is usually needed, resulting in a potential delay in obtaining a complete diagnostic work-up. Purpose To determine the diagnostic accuracy of ultrasound (US) of the liver performed in direct conjunction to CT in the preoperative investigation among patients with newly diagnosed CRC when indeterminate liver lesions were found on CT...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28281788/comparison-of-mammography-ultrasound-and-mri-in-size-assessment-of-ductal-carcinoma-in-situ-with-histopathologic-correlation
#7
Soo Heui Baek, Woo Jung Choi, Joo Hee Cha, Hak Hee Kim, Hee Jung Shin, Eun Young Chae
Background The ability to accurately assess tumor size in ductal carcinoma in situ (DCIS) is an important clinical issue when selecting the appropriate treatment plan. Purpose To compare the accuracy of using mammography, ultrasound (US), and magnetic resonance imaging (MRI) to assess DCIS tumor size based on imaging and histopathological findings. Material and Methods Fifty-six patients with DCIS were included. Mammography, US, and MRI were reviewed, and the accuracy of the measured tumor sizes were compared with the imaging and histopathological parameters...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273748/the-effects-of-uterine-artery-embolization-with-a-new-degradable-microsphere-in-an-experimental-study
#8
Johan Bengtsson, Wojciech Cwikiel, Pia C Sundgren, Erika Karlstam, Dolores Gavier-Widén, Inger Keussen
Background Transarterial particle embolization is a common treatment of uterine fibroids, aiming to obtain ischemia resulting in shrinking of the fibroid with preservation of normal uterine tissue. Embolization with non-degradable microspheres is established, but causes permanent occlusion of the arteries, affecting both the uterus as well as the fibroids. Purpose To evaluate in vivo degradation, local tissue effects, and possible recanalization following intra-arterial deposition of the new, degradable starch microspheres (DSM), in a short-term experimental pilot study...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273747/histogram-analysis-of-volume-based-apparent-diffusion-coefficient-in-breast-cancer
#9
Ga Eun Park, Sung Hun Kim, Eun Jeong Kim, Bong Joo Kang, Mi Sun Park
Background Breast cancer is a heterogeneous disease. Recent studies showed that apparent diffusion coefficient (ADC) values have various association with tumor aggressiveness and prognosis. Purpose To evaluate the value of histogram analysis of ADC values obtained from the whole tumor volume in invasive ductal cancer (IDC) and ductal carcinoma in situ (DCIS). Material and Methods This retrospective study included 201 patients with confirmed DCIS (n = 37) and IDC (n = 164). The IDC group was divided into two groups based on the presence of a DCIS component: IDC-DCIS (n = 76) and pure IDC (n = 88)...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273746/background-echotexture-classification-in-breast-ultrasound-inter-observer-agreement-study
#10
Won Hwa Kim, Su Hyun Lee, Jung Min Chang, Nariya Cho, Woo Kyung Moon
Background According to the American College of Radiology (ACR) Breast Imaging Reporting and Data System (BI-RADS), background echotexture in breast ultrasound (US) can be categorized as homogeneous or heterogeneous. Purpose To prospectively evaluate the inter-observer agreement of a four-category classification in background echotexture assessments of breast US and to determine whether background echotexture is related to breast cancer risk factors, including mammography density. Material and Methods Thirty-eight healthy women (age range, 25-72) were recruited...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273745/histogram-analysis-of-apparent-diffusion-coefficient-for-monitoring-early-response-in-patients-with-advanced-cervical-cancers-undergoing-concurrent-chemo-radiotherapy
#11
Jie Meng, Lijing Zhu, Li Zhu, Yun Ge, Jian He, Zhengyang Zhou, Xiaofeng Yang
Background Apparent diffusion coefficient (ADC) histogram analysis has been widely used in determining tumor prognosis. Purpose To investigate the dynamic changes of ADC histogram parameters during concurrent chemo-radiotherapy (CCRT) in patients with advanced cervical cancers. Material and Methods This prospective study enrolled 32 patients with advanced cervical cancers undergoing CCRT who received diffusion-weighted (DW) magnetic resonance imaging (MRI) before CCRT, at the end of the second and fourth week during CCRT and one month after CCRT completion...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273744/the-influence-of-diffusion-gradient-direction-on-diffusion-weighted-imaging-of-breast-mass-like-lesions-at-3-0t
#12
Feifei Yao, Ying Li, Yunfei Xiao, Dandan Zheng, Yan Zhang, Jingliang Cheng
Background It has been challenging to achieve ideal breast diffusion-weighted imaging (DWI). The optimization of diffusion gradient direction is of great importance. Purpose To evaluate the effect of diffusion gradient direction on the apparent diffusion coefficient (ADC) values of breast mass-like lesions and the visual grades of image quality, lesion visibility, and sharpness of breast contour at 3.0T. Material and Methods Sixty consecutive patients with mass-like lesions were enrolled in this study. In addition to typical breast magnetic resonance imaging (MRI) protocols, the breasts were scanned with conventional orthogonal DWI (c-DWI), tetrahedral DWI (t-DWI), and 3in1 DWI (3in1-DWI) sequences...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273743/periradicular-infiltration-of-the-lumbar-spine-testing-the-robustness-of-an-interventional-ultra-low-dose-protocol-at-different-body-mass-index-levels
#13
Fabian Henry Jürgen Elsholtz, Lars-Arne Schaafs, Thorsten Köhlitz, Bernd Hamm, Stefan Markus Niehues
Background Computed tomography (CT)-guided periradicular infiltration remains a frequent interventional procedure for treatment of low back pain. Purpose To present an interventional ultra-low-dose protocol for CT-guided periradicular infiltration therapy and assess its application at different body mass index (BMI) levels. Material and Methods Over a period of 14 months, 79 patients underwent 183 CT-guided interventions for single-site lumbar periradicular therapy using an ultra-low-dose protocol with a basic setup of 100 kV and 5 mAs...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273742/n-butyl-2-cyanoacrylate-nbca-embolus-in-the-graft-portal-vein-after-portosystemic-collateral-embolization-in-liver-transplantation-recipient-what-is-the-clinical-significance
#14
Hye Young Jang, Kyoung Won Kim, Jae Hyun Kwon, Heon-Ju Kwon, Bohyun Kim, Nieun Seo, Jeongjin Lee, Gi-Won Song, Sung-Gyu Lee
Background An N-butyl-2 cyanoacrylate (NBCA) embolus in the graft portal vein was frequently observed after an intraoperative embolization of portosystemic collaterals performed to prevent portal steal in liver transplant (LT) recipients. The radiological and clinical features of NBCA emboli have not yet been described. Purpose To describe radiological and clinical features of NBCA embolus in graft portal vein after portosystemic collateral embolization in LT recipients. Material and Methods A total of 165 consecutive LT recipients who had undergone intraoperative NBCA embolization of varix were found in single institution's computerized databases of a clinical cohort of LT...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273741/endovascular-management-for-significant-iatrogenic-portal-vein-bleeding
#15
Jong Woo Kim, Ji Hoon Shin, Jonathan K Park, Hyun-Ki Yoon, Gi-Young Ko, Dong Il Gwon, Jin Hyoung Kim, Kyu-Bo Sung
Background Despite conservative treatment, hemorrhage from an intrahepatic branch of the portal vein can cause hemodynamic instability requiring urgent intervention. Purpose To retrospectively report the outcomes of hemodynamically significant portal vein bleeding after endovascular management. Material and Methods During a period of 15 years, four patients (2 men, 2 women; median age, 70.5 years) underwent angiography and embolization for iatrogenic portal vein bleeding. Causes of hemorrhage, angiographic findings, endovascular treatment, and complications were reported...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273740/automatic-image-fusion-of-real-time-ultrasound-with-computed-tomography-images-a-prospective-comparison-between-two-auto-registration-methods
#16
Dong Ik Cha, Min Woo Lee, Ah Yeong Kim, Tae Wook Kang, Young-Taek Oh, Ja-Yeon Jeong, Jung-Woo Chang, Jiwon Ryu, Kyong Joon Lee, Jaeil Kim, Won-Chul Bang, Dong Kuk Shin, Sung Jin Choi, Dalkwon Koh, Bong Koo Seo, Kyunga Kim
Background A major drawback of conventional manual image fusion is that the process may be complex, especially for less-experienced operators. Recently, two automatic image fusion techniques called Positioning and Sweeping auto-registration have been developed. Purpose To compare the accuracy and required time for image fusion of real-time ultrasonography (US) and computed tomography (CT) images between Positioning and Sweeping auto-registration. Material and Methods Eighteen consecutive patients referred for planning US for radiofrequency ablation or biopsy for focal hepatic lesions were enrolled...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273739/dual-energy-ct-with-virtual-monochromatic-images-and-metal-artifact-reduction-software-for-reducing-metallic-dental-artifacts
#17
Jihoon Cha, Hyung-Jin Kim, Sung Tae Kim, Yi Kyung Kim, Ha Youn Kim, Gyeong Min Park
Background Metallic dental prostheses may degrade image quality on head and neck computed tomography (CT). However, there is little information available on the use of dual-energy CT (DECT) and metal artifact reduction software (MARS) in the head and neck regions to reduce metallic dental artifacts. Purpose To assess the usefulness of DECT with virtual monochromatic imaging and MARS to reduce metallic dental artifacts. Material and Methods DECT was performed using fast kilovoltage (kV)-switching between 80-kV and 140-kV in 20 patients with metallic dental prostheses...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28269992/volumetric-analysis-of-intravoxel-incoherent-motion-imaging-for-assessment-of-solitary-pulmonary-lesions
#18
Mei Yuan, Yan Zhong, Yu-Dong Zhang, Tong-Fu Yu, Hai Li, Jiang-Fen Wu
Background Differentiating between malignant and benign solitary pulmonary lesions (SPLs) is challenging. Purpose To determine diagnostic performance of intravoxel incoherent motion-based diffusion-weighted imaging (DW-IVIM) in distinguishing malignant from benign SPLs, using histogram analysis derived whole-tumor and single-section region of interest (ROI). Material and Methods This retrospective study received institutional review board approval. A total of 129 patients with diagnosed SPLs underwent DW-IVIM and apparent diffusion coefficient (ADC)...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28194993/preoperative-prediction-of-papillary-thyroid-microcarcinoma-via-multiparameter-ultrasound
#19
Hui Juan Ma, Jing Chun Yang, Zhen Peng Leng, Ying Chang, Hua Kang, Liang Hong Teng
Background Accurate diagnosis of papillary thyroid microcarcinoma (PTMC) is important for further management. Ultrasound (US) is the most frequently used imaging modality for PTMC. Purpose To evaluate the diagnostic value of conventional US, contrast-enhanced ultrasound (CEUS) and real-time elastography (RTE) for patients with PTMC. Material and Methods In total, 135 patients with subcentimeter thyroid nodules who underwent conventional US, CEUS, and RTE before surgery were enrolled. A multivariate logistic regression analysis was performed to assess the independent predictors of PTMC...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28181466/microstructures-in-striato-thalamo-orbitofrontal-circuit-in-methamphetamine-users
#20
Yadi Li, Haibo Dong, Feng Li, Gaoyan Wang, Wenhua Zhou, Rongbin Yu, Lingjun Zhang
Background Striato-thalamo-orbitofrontal (STO) circuit plays a key role in the development of drug addiction. Few studies have investigated its microstructural abnormalities in methamphetamine (MA) users. Purpose To evaluate the microstructural changes and relevant clinical relevance of the STO circuit in MA users using diffusion tensor imaging (DTI). Material and Methods Twenty-eight MA users and 28 age-matched normal volunteers were enrolled. 3T magnetic resonance imaging (MRI) was employed to obtain structural T1-weighted (T1W) imaging and diffusion-tensor imaging (DTI) data...
January 1, 2017: Acta Radiologica
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