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Acta Radiologica

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#1
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December 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28382828/use-of-fdg-pet-ct-in-identification-of-bone-marrow-involvement-in-diffuse-large-b-cell-lymphoma-and-follicular-lymphoma-comparison-with-iliac-crest-bone-marrow-biopsy
#2
COMPARATIVE STUDY
Alexandra R Teagle, Hannah Barton, Elizabeth Charles-Edwards, Sabina Dizdarevic, Timothy Chevassut
Background Non-Hodgkin's lymphoma (NHL) accounts for around 4% of new cancer cases annually. Bone marrow involvement is important for staging and management. Fluorodeoxyglucose positron emission tomography/computed tomography (FDG PET/CT) is used increasingly to identify this, in addition to bone marrow biopsy (BMB), which is seen as "gold" reference standard. Purpose To compare determination of bone marrow involvement by FDG PET/CT against BMB in diffuse large B-cell lymphoma (DLBCL) and follicular lymphoma (FL)...
December 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28361546/clinical-feasibility-of-simultaneous-multi-slice-imaging-with-blipped-caipi-for-diffusion-weighted-imaging-and-diffusion-tensor-imaging-of-the-brain
#3
Hajime Yokota, Koji Sakai, Jun Tazoe, Mariko Goto, Hiroshi Imai, Satoshi Teramukai, Kei Yamada
Background Simultaneous multi-slice (SMS) imaging is starting to be used in clinical situation, although evidence of clinical feasibility is scanty. Purpose To prospectively assess the clinical feasibility of SMS diffusion-weighted imaging (DWI) and diffusion-tensor imaging (DTI) with blipped-controlled aliasing in parallel imaging for brain lesions. Material and Methods The institutional review board approved this study. This study included 156 hyperintense lesions on DWI from 32 patients. A slice acceleration factor of 2 was applied for SMS scans, which allowed shortening of the scan time by 41...
December 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28350257/intrahepatic-mass-forming-cholangiocarcinoma-and-solitary-hypovascular-liver-metastases-is-the-differential-diagnosis-using-diffusion-weighted-mri-possible
#4
Jelena Djokić Kovač, Danijel Galun, Aleksandra Đurić-Stefanović, Gordana Lilić, Dragan Vasin, Ljubica Lazić, Dragan Mašulović, Đorđije Šaranović
Background Intrahepatic mass-forming cholangiocellular carcinoma (IMC) is the second most common primary liver tumor. The differentiation between IMC and solitary hypovascular liver metastases (SHLM) represents a diagnostic challenge due to many overlapping magnetic resonance imaging (MRI) features. Purpose To determine the value of diffusion-weighted imaging (DWI) in addition to conventional MRI for the distinction between intrahepatic mass-forming cholangiocarcinoma and solitary hypovascular liver metastases...
December 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28292199/high-resolution-mri-of-the-ulnar-and-radial-collateral-ligaments-of-the-wrist
#5
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...
December 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28286981/shear-wave-ultrasound-elastography-of-the-liver-in-normal-weight-and-obese-children
#6
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...
December 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
#7
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...
December 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
#8
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...
December 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
#9
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...
November 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273748/the-effects-of-uterine-artery-embolization-with-a-new-degradable-microsphere-in-an-experimental-study
#10
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...
November 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28273747/histogram-analysis-of-volume-based-apparent-diffusion-coefficient-in-breast-cancer
#11
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)...
November 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
#12
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...
November 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...
November 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...
November 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...
November 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
COMPARATIVE STUDY
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...
November 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...
November 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28194993/preoperative-prediction-of-papillary-thyroid-microcarcinoma-via-multiparameter-ultrasound
#18
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...
November 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28181466/microstructures-in-striato-thalamo-orbitofrontal-circuit-in-methamphetamine-users
#19
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...
November 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28181465/the-effect-of-ulnar-variance-on-scapholunate-and-capitolunate-angles
#20
Ozgur Tosun, Atilla Hikmet Çilengir, Berna Dirim Mete, Muhsin Engin Uluc, Orhan Oyar, Aliye Tosun
Background Ulnar variance (UV), which is measured using anteroposterior (AP) X-rays, is associated with the development of multiple wrist pathologies. The scapholunate angle (SLA) and capitolunate angle (CLA) are measured using lateral X-rays, and these can be used in the diagnosis of intercalated segmental instability. Purpose To determine the effect of UV on SLA and CLA. Material and Methods A total of 140 patients (73 women, 67 men; mean age, 37.8 ± 14.6 years; 95% confidence interval [CI], 35.4-40...
November 2017: Acta Radiologica
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