Effect of threshold on the correlation between airflow obstruction and low attenuation volume in smokers assessed by inspiratory and expiratory MDCT.
CONCLUSION: LAV% dramatically changed according to the threshold level on both inspiratory and expiratory images, indicating that LAV% is dependent on the attenuation threshold level in patients with COPD. The threshold linking LAV% to airflow limitation was higher on expiratory than on inspiratory images. PMID: 24633696 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 14, 2014 Category: Radiology Authors: Yanagawa N, Kawata N, Matsuura Y, Sugiura T, Suzuki T, Kasai H, Irie R, Iesato K, Tada Y, Tanabe N, Suzuki Y, Tatsumi K Tags: Acta Radiol Source Type: research

The putaminal abnormalities on 3.0T magnetic resonance imaging: can they separate parkinsonism-predominant multiple system atrophy from Parkinson's disease?
Abstract BACKGROUND: The putaminal abnormalities detected on 1.5 T magnetic resonance imaging (MRI), such as putaminal atrophy, slit-like hyperintense rim, and hypointensity in the putamen on T2-weighted (T2W) imaging are important signs on differentiating multiple system atrophy with parkinsonism (MSA-P) from Parkinson's disease (PD). However, the putaminal abnormalities may have different manifestations on 3.0 T from those on 1.5 T. PURPOSE: To investigate the diagnostic value of putaminal abnormalities on 3.0 T MRI for differentiating MSA-P from PD. MATERIAL AND METHODS: The study...
Source: Acta Radiologica - March 13, 2014 Category: Radiology Authors: Feng JY, Huang B, Yang WQ, Zhang YH, Wang LM, Wang LJ, Zhong XL Tags: Acta Radiol Source Type: research

Review of pelvic collateral pathways in aorto-iliac occlusive disease: demonstration by CT angiography.
Abstract The pelvic collateral system is a robust network of communicating vessels that provide the functional reserve to withstand chronic aorto-iliac occlusive disease. For establishment of collateral circulation, the afferent vessel must originate proximal to the occlusion and anastomose with vessel/s distal to the occlusion. These collateral pathways can be classified as viscero-systemic, systemic-systemic, and visceral-visceral. CT angiography (CTA) is often the initial modality for evaluating patients with atherosclerotic vascular disease, because it is non-invasive and has been shown to be comparable to con...
Source: Acta Radiologica - March 12, 2014 Category: Radiology Authors: Akinwande O, Ahmad A, Ahmad S, Coldwell D Tags: Acta Radiol Source Type: research

Monoenergetic extrapolation of cardiac dual energy CT for artifact reduction.
Abstract BACKGROUND: Monoenergetic extrapolation of cardiac dual-energy computed tomography (DECT) could be useful in artifact reduction in clinical practice. PURPOSE: To evaluate the potential of monoenergetic extrapolation of cardiac DECT data for reducing artifacts from metal and high iodine contrast concentration. MATERIAL AND METHODS: With IRB approval and in HIPAA compliance, 35 patients (22 men, 61 ± 12 years) underwent cardiac DECT with dual-source CT (100 kVp and 140 kVp). Contrast material injection protocols were adapted to the patient's weight using non-ioni...
Source: Acta Radiologica - March 10, 2014 Category: Radiology Authors: Secchi F, De Cecco CN, Spearman JV, Silverman JR, Ebersberger U, Sardanelli F, Schoepf UJ Tags: Acta Radiol Source Type: research

Standardized cine-loop documentation in renal ultrasound facilitates skill-mix between radiographer and radiologist.
en JB Abstract BACKGROUND: The radiographers' role in ultrasound (US) has been debated due to the operator-dependent aspect of diagnostic US. With standardized cine-loop ultrasound (SCUS) a reliable diagnosis can be achieved by reading SCUS independently from performing the procedure. PURPOSE: To study the correlation between sonographic findings when SCUS is performed and read by a radiologist and when SCUS is performed by a radiographer and read by a radiologist, and to assess the radiologists' confidence when reading SCUS examinations performed by a radiographer. MATERIAL AND METHODS: Thirty-four pati...
Source: Acta Radiologica - March 10, 2014 Category: Radiology Authors: Gaarder M, Seierstad T, Søreng R, Drolsum A, Begum K, Dormagen JB Tags: Acta Radiol Source Type: research

Transient subsolid nodules in patients with extrapulmonary malignancies: their frequency and differential features.
Abstract Background: For pulmonary subsolid nodules (SSNs) in patients with extrapulmonary malignancies, it is still unclear what proportion of SSNs is transient and how we can more accurately diagnose these transient SSNs.Purpose: To investigate the frequency of transient SSNs and their differentiating clinical and thin-section computed tomography (CT) features in patients with extrapulmonary malignancies.Material and Methods: From January 2005 to February 2012, 78 SSNs in 63 individuals (30 men and 33 women; mean age, 55.1 years ± 15.5) with extrapulmonary malignancies were identified. Their clinical and ...
Source: Acta Radiologica - March 10, 2014 Category: Radiology Authors: Choi WS, Park CM, Song YS, Lee SM, Wi JY, Goo JM Tags: Acta Radiol Source Type: research

Mid-term clinical outcomes and morphological changes after endovascular aneurysm repair of inflammatory abdominal aortic aneurysms: a single-center experience.
CONCLUSION:: Treatment of IAAA with EVAR was effective and reduced aneurysmal sac diameter and the extent of PAF with acceptable morbidity. PMID: 24609870 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 7, 2014 Category: Radiology Authors: Lee SH, Won JY, Lee DY, Kim IJ, Lee SJ, Kim MD, Park SI, Lee KH, Ko YG, Choi DH, Kim EK Tags: Acta Radiol Source Type: research

DCE-MRI biomarkers for monitoring an anti-angiogenic triple combination therapy in experimental hypopharynx carcinoma xenografts with immunohistochemical validation.
n CC Abstract BACKGROUND: Novel anti-angiogenic treatments are increasingly complementing established cancer therapy strategies in head and neck tumors. Contrast-enhanced magnetic resonance imaging (MRI) can be applied for early and non-invasive therapy monitoring by non-invasive quantitative assessment of tumor microcirculation as in vivo imaging biomarkers of therapy response. PURPOSE: To monitor the anti-angiogenic effects of a novel combination therapy on experimental head and neck squamous cell carcinomas (HNSCC) with dynamic contrast-enhanced (DCE)-MRI. MATERIAL AND METHODS: Athymic rats (n&th...
Source: Acta Radiologica - March 7, 2014 Category: Radiology Authors: Sterzik A, Paprottka PM, Zengel P, Hirner H, Roßpunt S, Eschbach R, Moser M, Havla L, Ingrisch M, Mack B, Reiser MF, Nikolaou K, Cyran CC Tags: Acta Radiol Source Type: research

Usefulness of oblique coronal and sagittal MR images of the knee after double-bundle and selective anterior cruciate ligament reconstructions.
CONCLUSION:: After double-bundle or selective-bundle ACL reconstruction, oblique sagittal and coronal images of the ACL provide better anatomic evaluation of the ACL than orthogonal views and specificity and accuracy of diagnoses were improved when oblique views were combined. PMID: 24589443 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 3, 2014 Category: Radiology Authors: Kim SI, Park HJ, Lee SY, Chung EC, Kwon HJ, Cha JG, Kim S Tags: Acta Radiol Source Type: research

Diffusion-weighted MRI compared to FDG PET/CT for assessment of early treatment response in lymphoma.
CONCLUSION: There was no significant correlation between ΔSUVmax and ΔADC. Thus, our data do not support that FDG PET/CT can be replaced by early DW MRI for response evaluation in lymphoma patients. PMID: 24585944 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 28, 2014 Category: Radiology Authors: Hagtvedt T, Seierstad T, Lund KV, Løndalen AM, Bogsrud TV, Smith HJ, Geier OM, Holte H, Aaløkken TM Tags: Acta Radiol Source Type: research

Susceptibility-weighted imaging for stem cell visualization in a rat photothrombotic cerebral infarction model.
Abstract BACKGROUND: In cell therapy, magnetic resonance imaging (MRI) has been used to visualize superparamagnetic iron oxide (SPIO)-labeled stem cells homing to a lesion. Improving traceability is to utilize the sequence that maximizes sensitivity to the susceptibility effect of SPIO. PURPOSE: To explore the best method by comparing the MRI sequences to visualize mesenchymal stem cells (MSCs) labeled with SPIO. MATERIAL AND METHODS: Human bone marrow (hBM)-derived MSCs were labeled by internalization of SPIO nanoparticles. In vitro MRI was performed for the SPIO-labeled hBM-MSCs in tubes with T2-weight...
Source: Acta Radiologica - February 26, 2014 Category: Radiology Authors: Ha BC, Jung J, Kwak BK Tags: Acta Radiol Source Type: research

Quantitative lung perfused blood volume imaging on dual-energy CT: capability for quantitative assessment of disease severity in patients with acute pulmonary thromboembolism.
Abstract BACKGROUND: Regional iodine distribution assessment on dual-energy computed tomography (DECT) has been suggested as useful for management of acute pulmonary thromboembolism (APTE) patients. However, no reported studies have made a direct comparison between quantitatively assessed DECT and right-to-left ventricular (RV/LV) ratio on CT for differentiation of right heart dysfunction (RHD) from non-right heart dysfunction (NRHD) in APTE patients. PURPOSE: To determine the capability of DECT for differentiation of RHD from NRHD in APTE patients. MATERIAL AND METHODS: Thirteen APTE patients underwent ...
Source: Acta Radiologica - February 24, 2014 Category: Radiology Authors: Miura S, Ohno Y, Kimura H, Kichikawa K Tags: Acta Radiol Source Type: research

Quantitative MRI morphology of invasive breast cancer: correlation with immunohistochemical biomarkers and subtypes.
Abstract BACKGROUND: Breast cancer is a heterogeneous disease with intrinsic molecular subtypes. The different biology and histology of breast cancer exhibit different tumor morphology at breast magnetic resonance imaging (MRI). However, few studies have examined the quantitative relationship between the MRI morphological and immunohistochemical features in breast cancer. PURPOSE: To investigate the correlations between tumor roundness, as quantitatively assessed with MRI and biomarkers or subtypes of breast cancer. MATERIAL AND METHODS: A total of 280 women (mean age, 51 years; range, 28-79 years) with ...
Source: Acta Radiologica - February 20, 2014 Category: Radiology Authors: Bae MS, Seo M, Kim KG, Park IA, Moon WK Tags: Acta Radiol Source Type: research

High incidence of asymptomatic cerebral microbleeds in patients with hemorrhagic onset-type moyamoya disease: a phase-sensitive MRI study and meta-analysis.
CONCLUSION: PSI or SWI can detect CMBs better than T2*WI, and 3-T T2*WI. Hemorrhagic onset-type moyamoya disease seems to correlate with a high incidence of asymptomatic CMBs. The meta-analysis indicates that asymptomatic CMBs may be an important factor for hemorrhagic stroke risk. Long-term evaluation of CMBs using PSI or SWI may contribute to the management of moyamoya disease. PMID: 24558166 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 20, 2014 Category: Radiology Authors: Qin Y, Ogawa T, Fujii S, Shinohara Y, Kitao SI, Miyoshi F, Takasugi M, Watanabe T, Kaminou T Tags: Acta Radiol Source Type: research

MRI of the lumbar spine: comparison of 3D isotropic turbo spin-echo SPACE sequence versus conventional 2D sequences at 3.0 T.
CONCLUSION: Isotropic 3D T2W TSE-SPACE at 3.0 T was comparable to 2D T2W TSE for detecting foraminal stenosis, central spinal stenosis, and nerve compression with better inter-observer agreements and symptom correlation. PMID: 24553584 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 19, 2014 Category: Radiology Authors: Lee S, Jee WH, Jung JY, Lee SY, Ryu KS, Ha KY Tags: Acta Radiol Source Type: research

Mapping of the femora trochlea in a newborn population: an ultrasonographic study.
CONCLUSION: As a method of visualizing the newborn femoral trochlea and the position of the patella, ultrasonography is a reliable tool and might be of vital importance. In a further perspective, knowledge of the anatomy of a normal versus a dysplastic newborn trochlea renders it possible to study the predisposing factors to patellar instability and methods of treatment. Our results indicate that dysplasia of the femoral trochlea may be congenital. PMID: 24553585 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 19, 2014 Category: Radiology Authors: Oye CR, Holen KJ, Foss OA Tags: Acta Radiol Source Type: research

Magnetic resonance imaging of breast cancer: factors affecting the accuracy of preoperative lesion sizing.
Abstract BACKGROUND: Accurate preoperative sizing of breast cancer with imaging modalities has a great importance in the surgical planning. PURPOSE: To assess the influence of tumor size and histology on the accuracy of measurement of cancer local extension by magnetic resonance imaging (MRI). MATERIAL AND METHODS: One hundred and eighty-six patients with primary breast cancer, for a total of 221 lesions, were included in this retrospective study. Tumors were divided into five histological groups: invasive ductal carcinoma (IDC), IDC with extensive intraductal component (EIC), invasive lobular carcinoma ...
Source: Acta Radiologica - February 13, 2014 Category: Radiology Authors: Mennella S, Garlaschi A, Paparo F, Perillo M, Celenza M, Massa T, Rollandi GA, Garlaschi G Tags: Acta Radiol Source Type: research

The role of US in finding intussusception and alternative diagnosis: a report of 100 pediatric cases.
CONCLUSION: With the high sensitivity and specificity of this study we conclude that US is valuable in detecting intussusception and finding the alternative diagnosis. PMID: 24526755 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 13, 2014 Category: Radiology Authors: Ja Lim K, Lee K, Yoon DY, Moon JH, Lee H, Kim MJ, Kim SS Tags: Acta Radiol Source Type: research

No correlations between radiological angles and self-assessed quality of life in patients with hip dysplasia at 2-13 years of follow-up after periacetabular osteotomy.
CONCLUSION: The physical components of QoL in patients undergoing PAO are significantly lower than the Danish population used as reference. Furthermore, the results suggest that physical function after PAO decreases with longer follow-up time. Neither the acetabular angles nor hypermobility is associated with the physical components of QoL. PMID: 24526756 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 13, 2014 Category: Radiology Authors: Birch S, Liljensøe A, Hartig-Andreasen C, Søballe K, Mechlenburg I Tags: Acta Radiol Source Type: research

Ultrasound-guided percutaneous microwave ablation of sporadic renal angiomyolipoma: preliminary results.
CONCLUSION: MWA is an effective and minimally invasive technique for the management of AML that can preserve renal function with acceptable complication rates. PMID: 24526757 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 13, 2014 Category: Radiology Authors: Zhi-Yu H, Ping L, Xiao-Ling Y, Zhi-Gang C, Fang-Yi L, Jie Y Tags: Acta Radiol Source Type: research

Integrating contrast-enhanced sonography in the follow-up algorithm of hepatocellular carcinoma treated with radiofrequency ablation: single cancer center experience.
CONCLUSION: CEUS follow-up of HCC patients after ablation is feasible. Since 72% recurrences develop in the same segment of the necrotic nodule, CEUS proves to be effective despite the minor visualization of the entire liver during the arterial phase when compared to CT and MRI. Including CEUS in patient follow-up may reduce the number of CT and MRI examinations. PMID: 24523360 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 12, 2014 Category: Radiology Authors: Catalano O, Izzo F, Vallone P, Sandomenico F, Albino V, Nunziata A, Fusco R, Petrillo A Tags: Acta Radiol Source Type: research

Is the diagnostic yield of myocardial stress perfusion MRI impaired by three-vessel coronary artery disease?
CONCLUSION: The diagnostic value of stress perfusion cardiac MRI in patients with 3-vessel CAD is comparable to results in patients with 1- or 2-vessel CAD. In the rare event that stress perfusion images do not depict regional hypoperfusion in patients with severe 3-vessel CAD, myocardial ischemia could be identified by reduced semi-quantitative perfusion parameters. PMID: 24523361 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 12, 2014 Category: Radiology Authors: Klumpp B, Miller S, Seeger A, May A, Gawaz M, Claussen C, Kramer U Tags: Acta Radiol Source Type: research

Endovascular embolization is applicable for large and giant intracranial aneurysms: experience in one center with long-term angiographic follow-up.
CONCLUSION: Endovascular intervention with coiling alone or stent-assisted coiling for large and giant cerebral aneurysms is not very effective, while covered stents are more promising. Better endovascular devices are needed to obtain more secure closure. PMID: 24518686 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 11, 2014 Category: Radiology Authors: Wang B, Gao BL, Xu GP, Xiang C, Liu XS Tags: Acta Radiol Source Type: research

Comparison of utility of tumor size and apparent diffusion coefficient for differentiation of low- and high-grade clear-cell renal cell carcinoma.
Abstract BACKGROUND:: There is a significant correlation between tumor size and tumor grade for clear-cell renal cell carcinoma (RCC) in pathology. Thus, apparent diffusion coefficient (ADC) of clear-cell RCC might be influenced by tumor size. PURPOSE:: To compare the utility of tumor size and ADC for distinguishing low-grade from high-grade clear-cell RCC. MATERIAL AND METHODS:: Forty-nine patients undergoing preoperative magnetic resonance imaging were retrospectively assessed. ADC values were calculated using b-value combinations of 0 and 800 s/mm(2) at 1.5 T. Two radiologists in consens...
Source: Acta Radiologica - February 11, 2014 Category: Radiology Authors: Maruyama M, Yoshizako T, Uchida K, Araki H, Tamaki Y, Ishikawa N, Shiina H, Kitagaki H Tags: Acta Radiol Source Type: research

Transarterial chemoembolization as first-line therapy for hepatocellular carcinomas infeasible for ultrasound-guided radiofrequency ablation: a retrospective cohort study of 116 patients.
CONCLUSION: TACE is a viable first-line treatment of HCC infeasible for RFA, especially when liver function was preserved. PMID: 24518688 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 11, 2014 Category: Radiology Authors: Song YG, Shin SW, Cho SK, Choi D, Rhim H, Lee MW, Kim YS, Park KB, Park HS, Choo SW, Do YS, Choo IW, Hyun D Tags: Acta Radiol Source Type: research

Percutaneous biliary covered stent insertion in patients with malignant duodenobiliary obstruction.
CONCLUSION: Percutaneous insertion of a PTFE-covered stent is a safe and effective method for palliative treatment of patients with malignant duodenobiliary obstruction. If possible, subsequent biliary stent insertion is preferable in order to prevent possible biliary stent dysfunction caused by subsequent insertion of a duodenal stent. PMID: 24518689 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 11, 2014 Category: Radiology Authors: Lee E, Gwon DI, Ko GY, Sung KB, Yoon HK, Shin JH, Kim JH, Ko HK, Song HY Tags: Acta Radiol Source Type: research

Non-invasive estimation of prostate cancer aggressiveness using diffusion-weighted MRI and 3D proton MR spectroscopy at 3.0 T.
CONCLUSION: The combination of a highly sensitive normalized ADC with a highly specific CCC was found to be well suited to prospectively estimate PCa aggressiveness with a similar diagnostic accuracy as biopsy results. PMID: 24504488 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 6, 2014 Category: Radiology Authors: Thörmer G, Otto J, Horn LC, Garnov N, Do M, Franz T, Stolzenburg JU, Moche M, Kahn T, Busse H Tags: Acta Radiol Source Type: research

Diagnostic accuracy of 3D color volume-rendered CT images for peroneal tendon dislocation in patients with acute calcaneal fractures.
CONCLUSION: Diagnostic accuracy of 3D images is comparable to, but not as good as that of MPR images for the diagnosis of peroneal tendon dislocation in patients with acute calcaneal fractures. PMID: 24493866 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 3, 2014 Category: Radiology Authors: Ohashi K, Sanghvi T, El-Khoury GY, Ahn JM, Bennett DL, Geijer M, Inaoka T, Berbaum K Tags: Acta Radiol Source Type: research

Anatomic variants of arteries often coil-occluded prior to hepatic radioembolization.
CONCLUSION:: Variant anatomy of the RGA is common, while it is quite rare for the GDA and CA. Knowledge of the variations of liver supplying arteries helps the interventionalist to embolize necessary vessels prior to RE. PMID: 24477267 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - January 29, 2014 Category: Radiology Authors: Powerski MJ, Erxleben C, Scheurig-Münkler C, Geisel D, Hamm B, Gebauer B Tags: Acta Radiol Source Type: research

Estimation of proliferative potentiality of central neurocytoma: correlational analysis of minimum ADC and maximum SUV with MIB-1 labeling index.
Abstract BACKGROUND: Central neurocytoma was initially believed to be benign tumor type, although atypical cases with more aggressive behavior have been reported. Preoperative estimation for proliferating activity of central neurocytoma is one of the most important considerations for determining tumor management. PURPOSE: To investigate predictive values of image characteristics and quantitative measurements of minimum apparent diffusion coefficient (ADCmin) and maximum standardized uptake value (SUVmax) for proliferative activity of central neurocytoma measured by MIB-1 labeling index (LI). MATERIAL AND...
Source: Acta Radiologica - January 29, 2014 Category: Radiology Authors: Sakamoto R, Okada T, Kanagaki M, Yamamoto A, Fushimi Y, Kakigi T, Arakawa Y, Takahashi JC, Mikami Y, Togashi K Tags: Acta Radiol Source Type: research

Rotator cuff tears: correlation between geometric tear patterns on MRI and arthroscopy and pre- and postoperative clinical findings.
CONCLUSION: Geometric RC tear characterizations on preoperative MRIs were closely associated with arthroscopic findings. Postoperative results were not affected by the geometric pattern of the tears. PMID: 24445094 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - January 21, 2014 Category: Radiology Authors: Sela Y, Eshed I, Shapira S, Oran A, Vogel G, Herman A, Perry Pritsch M Tags: Acta Radiol Source Type: research

Is there a need for MRI within 24 hours after CT-guided percutaneous thermoablation of the liver?
Abstract BACKGROUND: Radiofrequency (RFA) and microwave ablation (MWA) are established minimally invasive techniques for treatment of hepatic tumors. PURPOSE: To compare technical success and accuracy of hepatic thermoablation using computed tomography (CT) and magnetic resonance imaging (MRI) acquired 24 h after ablation with regard to evaluation of the post-interventional ablation zone and local tumor recurrence (LTR), and to assess whether additional MRI within 24 h is beneficial. MATERIAL AND METHODS: Thirty-two patients (23 men, 9 women; mean age, 60 years) with 48 lesions were include...
Source: Acta Radiologica - January 20, 2014 Category: Radiology Authors: Ringe KI, Wacker F, Raatschen HJ Tags: Acta Radiol Source Type: research

Contrast-enhanced ultrasound using real-time contrast harmonic imaging in invasive breast cancer: comparison of enhancement dynamics with three different doses of contrast agent.
Axelsson R Abstract BACKGROUND: In the last few years new potential applications have been developed for contrast-enhanced ultrasound (CEUS) and the management of breast diseases, but there is still some debate concerning the optimal dose to evaluate breast lesions, especially as a diagnostic tool. PURPOSE: To compare different CEUS doses of injected contrast agent in order to establish an optimal dose for the diagnosis of invasive breast cancer. MATERIAL AND METHODS: In Group A we compared the bolus dose of 1.2 mL vs. 2.4 mL and in Group B we compared the bolus dose of 2.4 mL vs. 4...
Source: Acta Radiologica - January 20, 2014 Category: Radiology Authors: Saracco A, Szabó BK, Aspelin P, Leifland K, Tánczos E, Wilczek B, Axelsson R Tags: Acta Radiol Source Type: research

Quantitative measurement to evaluate morphological changes of the corpus callosum in patients with subcortical ischemic vascular dementia.
Abstract BACKGROUND: Subcortical ischemic vascular dementia (SIVD) is a subtype of dementia associated with abnormalities in the subcortical white matter regions. Recent imaging techniques can be used to detect such abnormalities in vivo. PURPOSE: To examine morphological changes of the corpus callosum in patients with SIVD by using magnetic resonance imaging (MRI) and diffusion tensor imaging (DTI). MATERIAL AND METHODS: MRI was performed to explore changes of cerebral white matter, especially corpus callosum. Brain matter diffusivity was examined with DTI by measuring the fractional anisotropy (FA...
Source: Acta Radiologica - January 20, 2014 Category: Radiology Authors: Wu XP, Gao YJ, Yang JL, Xu M, Sun DH Tags: Acta Radiol Source Type: research

Role of diffusion-weighted MRI in acute pyelonephritis: a prospective study.
Abstract BACKGROUND: Imaging is vital in diagnosis of complicated pyelonephritis and has been traditionally performed by computed tomography (CT). However, CT with contrast agents cannot be performed in patients with renal failure. Diffusion-weighted (DW) magnetic resonance imaging (MRI) has the potential to overcome this disadvantage. PURPOSE: To prospectively evaluate the accuracy of quantitative apparent diffusion coefficient (ADC) values to differentiate nephritis from renal abscesses in patients with pyelonephritis. MATERIAL AND METHODS: Forty-two patients with clinical and laboratory diagnosis of p...
Source: Acta Radiologica - January 17, 2014 Category: Radiology Authors: Rathod SB, Kumbhar SS, Nanivadekar A, Aman K Tags: Acta Radiol Source Type: research

Meta-analysis of contrast-enhanced ultrasound for the differentiation of benign and malignant breast lesions.
CONCLUSION: CEUS has good sensitivity and specificity in the characterization of breast lesions and can potentially help to select suspicious breast mass for surgery. PMID: 24436445 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - January 16, 2014 Category: Radiology Authors: Hu Q, Wang XY, Zhu SY, Kang LK, Xiao YJ, Zheng HY Tags: Acta Radiol Source Type: research

Radiofrequency ablation combined with transcatheter therapy in rabbit VX2 liver tumors: effects and histopathological characteristics.
Abstract BACKGROUND: Transarterial chemoembolization (TACE) combined with radiofrequency ablation (RFA) treatment (TACE-RFA) has been confirmed superior to TACE or RFA alone in animal liver tumors. TACE before RFA was shown to increase hepatocellular damage. Further optimization of the combination strategy for transcatheter arterial embolization (TAE) or TACE combined with RFA is warranted. PURPOSE: To determine the optimal strategy for radiofrequency ablation combined with transcatheter therapies in VX2 liver tumors in a rabbit model. MATERIAL AND METHODS: Twenty-four Japanese White rabbits with VX2 liv...
Source: Acta Radiologica - January 14, 2014 Category: Radiology Authors: Duan X, Zhou G, Han X, Ren J, Zheng C, Liang H, Feng G Tags: Acta Radiol Source Type: research

Double reading rates and quality assurance practices in Norwegian hospital radiology departments: two parallel national surveys.
CONCLUSION: The rate of double reading in Norwegian hospital radiology is significantly correlated to department teaching status, but not to other practices of quality work. PMID: 24425793 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - January 14, 2014 Category: Radiology Authors: Lauritzen PM, Hurlen P, Sandbæk G, Gulbrandsen P Tags: Acta Radiol Source Type: research

Endovascular transcatheter embolization of recurrent postsurgical varicocele: anatomic reasons for surgical failure.
CONCLUSION: Retrograde varicocele embolization may be superior to surgery because of its ability to detect gonadal vein variants. In our study group, transcatheter embolization with 3% polidocanol and fibered coils allowed successful, minimally invasive treatment of postsurgical varicoceles. PMID: 24413222 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - January 10, 2014 Category: Radiology Authors: Jargiello T, Drelich-Zbroja A, Falkowski A, Sojka M, Pyra K, Szczerbo-Trojanowska M Tags: Acta Radiol Source Type: research

MR image texture in Parkinson's disease: a longitudinal study.
CONCLUSION: Texture analysis offers a quantitative method for detecting structural changes in brain MR images. However, the protocol and repeatability of the method must be enhanced before possible clinical use. PMID: 24413223 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - January 10, 2014 Category: Radiology Authors: Sikiö M, Holli-Helenius KK, Harrison LC, Ryymin P, Ruottinen H, Saunamäki T, Eskola HJ, Elovaara I, Dastidar P Tags: Acta Radiol Source Type: research

Pain control in patients with hepatocellular carcinoma treated by percutaneous radiofrequency ablation: comparison of the efficacy of one-shot and continuous intravenous fentanyl delivery.
Abstract BACKGROUND: Hepatic percutaneous radiofrequency ablation (RFA) is usually performed with the patient under deep intravenous (i.v.) sedation or general anesthesia. Nonetheless, many patients report pain during and/or after the procedure. PURPOSE: To perform a prospective study of pain control obtained by the i.v. one-shot delivery and the continuous i.v. infusion of fentanyl in patients with hepatocellular carcinoma (HCC) treated by RFA. MATERIAL AND METHODS: Between April 2007 and March 2010, 83 patients with 106 HCCs underwent percutaneous RFA. All HCCs were addressed by computed tomography (CT...
Source: Acta Radiologica - January 10, 2014 Category: Radiology Authors: Yokoyama K, Ikeda O, Kawanaka K, Nakasone Y, Inoue S, Tamura Y, Yamashita Y Tags: Acta Radiol Source Type: research

Flow artifact in the anterior communicating artery resembling aneurysm on the time of flight MR angiogram.
CONCLUSION: MR angiogram can result in artifacts at ACOM which may be mistaken for aneurysm. Such pseudoaneurysms have characteristic appearance and should be followed up with non-invasive tests. PMID: 24413225 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - January 10, 2014 Category: Radiology Authors: Takhtani D, Dundamadappa S, Puri AS, Wakhloo A Tags: Acta Radiol Source Type: research

Coronary stent imaging with dual-source CT: assessment of lumen visibility using different convolution kernels and postprocessing filters.
Abstract BACKGROUND: Assesment of the coronary arteries after stent placement using coronary computed tomography angiography (CCTA) currently requires reconstruction of images with soft kernels for the assessment of atherosclerotic plaques and dedicated edge enhancing kernels for the evaluation of the stent lumen. PURPOSE: To evaluate a two-dimensional filter tool that provides instant postprocessing of images reconstructed with soft kernels into edge-enhanced images and vice versa and thus may eliminate the need for two separate reconstrcutions for the assessment of coronary artery stents using CCTA. MA...
Source: Acta Radiologica - January 7, 2014 Category: Radiology Authors: Ulrich A, Burg MC, Raupach R, Bunck A, Schuelke C, Maintz D, Heindel W, Seifarth H Tags: Acta Radiol Source Type: research

Triaxial coil embolization using Guglielmi detachable coils with the voltage-dependent coil-detaching technique.
CONCLUSION: The triaxial system in coil embolization using a GDC by monitoring the voltage for coil-detaching appeared to be safe and effective. PMID: 24362647 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - December 20, 2013 Category: Radiology Authors: Shimohira M, Hashizume T, Ohta K, Suzuki K, Kurosaka K, Muto M, Shibamoto Y Tags: Acta Radiol Source Type: research

Impact of beta-blockade premedication on image quality of ECG-gated thoracic aorta CT angiography.
CONCLUSION: Beta-blocker premedication may not be necessary for imaging of ascending aorta with ECG-gated DSCTA. PMID: 24345768 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - December 17, 2013 Category: Radiology Authors: Entezari P, Collins J, Chalian H, Tore HG, Carr J, Yaghmai V Tags: Acta Radiol Source Type: research

Standardized cine-loop documentation in abdominal ultrasound facilitates offline image interpretation.
CONCLUSION: Standardized cine-loop documentation enables accurate offline reading in abdominal ultrasound and shows high agreement with immediate bedside reading. PMID: 24345769 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - December 17, 2013 Category: Radiology Authors: Dormagen JB, Gaarder M, Drolsum A Tags: Acta Radiol Source Type: research

Ultrasonographic indications for conservative treatment in pregnancy-related uterine arteriovenous malformations.
Abstract BACKGROUND: Uterine arteriovenous malformations (AVMs) are known to spontaneously regress. PURPOSE: To assess the predictive value of ultrasonography for patients requiring conservative treatment for pregnancy related to AVMs. MATERIAL AND METHODS: Our prospective study included 75 patients (conservative management:therapeutic management = 45:30) with vaginal bleeding from pregnancy-related AVM. Clinical and ultrasonography examinations were reviewed, and the following information was gathered: complete blood count, AVM maximal diameter, AVM echogenicity, retained product of concep...
Source: Acta Radiologica - December 11, 2013 Category: Radiology Authors: Lee TY, Kim SH, Lee HJ, Kim MJ, Lee SK, Kim YH, Cho SH Tags: Acta Radiol Source Type: research

Accuracy of computed tomography findings in acute pericarditis.
CONCLUSION:: CT findings, while not sensitive for pericarditis, are diagnostic, with few false-positives. Radiologists should be attentive to pericardial thickening or enhancement on CT studies done for chest pain, as they may be able to suggest pericarditis as an alternative diagnosis for the chest pain. PMID: 24327762 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - December 10, 2013 Category: Radiology Authors: Hammer MM, Raptis CA, Javidan-Nejad C, Bhalla S Tags: Acta Radiol Source Type: research

Differentiation of pleomorphic adenoma and Warthin's tumor of the parotid gland: ultrasonographic features.
CONCLUSION: Ultrasound imaging characteristics, including multiple occurrences, shape, intrinsic cystic change, and the grade and distribution of tumor vessels, can be used to differentiate pleomorphic adenomas from Warthin's tumors. PMID: 24324278 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - December 9, 2013 Category: Radiology Authors: Rong X, Zhu Q, Ji H, Li J, Huang H Tags: Acta Radiol Source Type: research

Characterizing focal hepatic lesions by free-breathing intravoxel incoherent motion MRI at 3.0 T.
Abstract BACKGROUND: Diffusion-weighted (DW) imaging is commonly used to distinguish between benign and malignant liver lesions. PURPOSE: To prospectively evaluate the true molecular-diffusion coefficient (D), perfusion-related diffusion coefficient (D*), perfusion fraction (f), and ADC of focal hepatic lesions using a free-breathing intravoxel incoherent motion (IVIM) DW sequence, and to determine if these parameters are useful for characterizing focal hepatic lesions. MATERIAL AND METHODS: One hundred and twenty hepatic lesions (34 metastases, 32 hepatocellular carcinoma [HCC], 33 hemangiomas, and 21 l...
Source: Acta Radiologica - December 6, 2013 Category: Radiology Authors: Watanabe H, Kanematsu M, Goshima S, Kajita K, Kawada H, Noda Y, Tatahashi Y, Kawai N, Kondo H, Moriyama N Tags: Acta Radiol Source Type: research