Grading lumbar disc degeneration: a comparison between low- and high-field MRI.
Abstract BACKGROUND: More advanced disc degeneration on magnetic resonance imaging (MRI) is found in individuals with low back pain. However, it is unclear whether this grading is independent of the scanner's field strength. PURPOSE: To compare disc degeneration on high- versus low-field MRI. MATERIAL AND METHODS: Low back pain patients were enrolled to undergo high-field (3 T) MRI, followed by low-field (0.25 T) MRI of the lumbar spine within 3 h. Three radiologists graded the disc degeneration on Pfirrmann's grading scale with a hiatus of 3 months. A subsample was regraded 6 months later. Reproducibili...
Source: Acta Radiologica - April 19, 2019 Category: Radiology Authors: Hansen BB, Ciochon UM, Trampedach CR, Christensen AF, Rasti Z, Boesen M Tags: Acta Radiol Source Type: research

Wash-in/wash-out phase xenon-enhanced area-detector CT (ADCT): utility for regional ventilation, pulmonary functional loss and clinical stage evaluations of smokers.
Abstract BACKGROUND: Xenon (Xe)-enhanced area-detector computed tomography (ADCT) can visualize regional distribution of Xe within the lungs and demonstrate regional ventilation differences in smokers and patients with pulmonary diseases. PURPOSE: The purpose of this study was to evaluate the capability of wash-in and wash-out (WI/WO) phase Xe-enhanced ADCT for detecting regional ventilation differences based on underlying lung conditions, pulmonary functional loss evaluation, and clinical stage prediction for smokers with and without chronic obstructive pulmonary disease (COPD). MATERIAL AND METHODS: Th...
Source: Acta Radiologica - April 18, 2019 Category: Radiology Authors: Ohno Y, Fujisawa Y, Sugihara N, Kishida Y, Koyama H, Seki S, Yoshikawa T Tags: Acta Radiol Source Type: research

Assessing the nephrotoxicity of intravenous iodinated contrast agents in patients with chronic renal failure in the absence of interfering acute disease.
CONCLUSION: No relevant contrast-induced nephrotoxicity was detected in this group of patients with chronic renal failure without acute disease. PMID: 30997828 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - April 18, 2019 Category: Radiology Authors: Gallardo X, Almirall J, Castaner E, Andreu M, Gonzalez E, Consola B Tags: Acta Radiol Source Type: research

Differential diagnosis of hepatic cancerous nodules and cirrhosis nodules by spectral CT imaging: a feasibility study.
CONCLUSION: We have demonstrated in this feasibility study that spectral CT imaging provides multiple quantitative parameters which may be used to help differentiating hepatic cancerous nodules from cirrhosis nodules. PMID: 30943752 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - April 3, 2019 Category: Radiology Authors: Gao L, Lv Y, Jin Y, Han F, Yao Z, Yang J, Zhang J Tags: Acta Radiol Source Type: research

Comparison of monoexponential, intravoxel incoherent motion diffusion-weighted imaging and diffusion kurtosis imaging for assessment of hepatic fibrosis.
CONCLUSION: IVIM-DWI might be more suitable for detecting hepatic fibrosis than the monoexponential and kurtosis model, and D* showed a better diagnostic performance to detect clinically significant fibrosis than other parameters. PMID: 30935212 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - April 1, 2019 Category: Radiology Authors: Yoon JH, Lee JM, Lee KB, Kim D, Kabasawa H, Han JK Tags: Acta Radiol Source Type: research

Manganese-enhanced magnetic resonance imaging in the whole visual pathway: chemical identification and neurotoxic changes.
CONCLUSION: Our study indicated that MEMRI with TSMIP after injection of 200 nmol MnCl2 can best show the entire and 3D visual pathway in the rat with less neurotoxic changes. Additionally, chemical identification is useful for the confirmation of the specificity of MEMRI. PMID: 30922072 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 28, 2019 Category: Radiology Authors: Xiao Z, Tang Z, Wu L, Feng X, Sun X, Tang W, Wang J, Jin L, Wang R Tags: Acta Radiol Source Type: research

Predictive value of preoperative MRI features for the Ki-67 index in well-differentiated G1/G2 pancreatic neuroendocrine tumors.
Abstract BACKGROUND: The accurate estimation of the Ki-67 index of well-differentiated pancreatic neuroendocrine tumors (PanNET) not only guides curative management but also avoids unnecessary treatment. PURPOSE: To investigate whether magnetic resonance imaging (MRI) features could preoperatively discriminate the Ki-67 index of well-differentiated G1/G2 PanNETs and to construct an individualized predictive model through developing a MRI-based nomogram. MATERIAL AND METHODS: Ninety-nine patients with G1/G2 PanNETs were divided into Ki-67 index
Source: Acta Radiologica - March 26, 2019 Category: Radiology Authors: Sun H, Zhang S, Liu K, Zhou J, Wang X, Shen T, Wang X Tags: Acta Radiol Source Type: research

Ipsilateral atrophy of the mammillary body and fornix after thalamic stroke: evaluation by MRI.
CONCLUSION: Damage to the anterior thalamic nucleus and/or MTT caused TND in the ipsilateral MB and/or Fx resulted in atrophy and asymmetry in less than half of patients studied, mostly within three years. PMID: 30909707 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 25, 2019 Category: Radiology Authors: Kinoshita F, Kinoshita T, Toyoshima H, Shinohara Y Tags: Acta Radiol Source Type: research

Dedifferentiated liposarcoma of the musculoskeletal system: expanded MR imaging spectrum from predominant fatty mass to non-fatty mass.
CONCLUSION: Dedifferentiated liposarcoma lesions showed a diverse spectrum of MRI findings. Although the presence of a non-fatty region within or adjacent to a well-defined fatty mass can suggest dedifferentiated liposarcoma, non-fatty masses without a fatty component were frequent on MRI. PMID: 30907094 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 24, 2019 Category: Radiology Authors: Yun JS, Chung HW, Song JS, Lee SH, Lee MH, Shin MJ Tags: Acta Radiol Source Type: research

Comparison of invasive micropapillary and invasive ductal carcinoma of the breast: a matched cohort study.
CONCLUSION: The IMPC group showed poorer recurrence-free survival outcomes than the IDC group. A mass with calcification on mammography were associated with poor RFS. PMID: 30897929 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 21, 2019 Category: Radiology Authors: Yoon GY, Cha JH, Kim HH, Shin HJ, Chae EY, Choi WJ Tags: Acta Radiol Source Type: research

Bi-exponential versus mono-exponential diffusion-weighted imaging for evaluating prostate cancer aggressiveness after radical prostatectomy: a whole-tumor histogram analysis.
CONCLUSION: The bi-exponential model was not superior to the mono-exponential diffusion model for evaluating PCa aggressiveness. The histogram metrics did not outperform the conventional mean value. PMID: 30897930 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 21, 2019 Category: Radiology Authors: Zhang P, Min X, Wang L, Feng Z, Ke Z, You H, Fan C, Li Q Tags: Acta Radiol Source Type: research

Intra-procedural bronchial artery embolization planning: the usefulness of cone-beam CT.
n R Abstract BACKGROUND: Bronchial artery embolization (BAE) can be a challenging intervention due to variations of the vascular anatomy. PURPOSE: To evaluate the utility of C-arm cone-beam computed tomography (CBCT) for BAE in patients with hemoptysis and indefinite bronchial artery (BA) anatomy on pre-interventional CT imaging. MATERIAL AND METHODS: From November 2016 to July 2017, 17 patients (mean age = 64.3 ± 14.7 years) with hemoptysis underwent BAE including pre-interventional CT, aortography, and CBCT during the procedure. CBCT, angiography, and CT were independ...
Source: Acta Radiologica - March 21, 2019 Category: Radiology Authors: Grosse U, Grözinger G, Syha R, Ketelsen D, Partovi S, Nikolaou K, Hoffmann R Tags: Acta Radiol Source Type: research

Do radiologists detect chronic thromboembolic disease on computed tomography?
CONCLUSION: The study shows that radiologists frequently miss CTEPH findings, leading to a falsely low sensitivity for CT. There was also a notable discrepancy in how the findings were presented in radiology reports. PMID: 30897932 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 21, 2019 Category: Radiology Authors: Rogberg AN, Gopalan D, Westerlund E, Lindholm P Tags: Acta Radiol Source Type: research

Treatment of restenosis in radiocephalic arteriovenous hemodialysis fistulas: percutaneous transluminal angioplasty or drug-coated balloon.
CONCLUSION: Our results indicate that DCB angioplasty is associated with significantly improved patency in the treatment of restenosis in radiocephalic AVFs. A longer follow-up or randomized controlled trial is warranted. PMID: 30897933 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 21, 2019 Category: Radiology Authors: Haave TR, Manstad-Hulaas F, Brekken R Tags: Acta Radiol Source Type: research

Visualization of large vessel occlusion, clot extent, and collateral supply using volume perfusion flat detector computed tomography in acute stroke patients.
CONCLUSION: FDCTA, reconstructed from VP-FDCT data, allows reliable detection of ICA or MCA M1 segment occlusion comparable to CTA and may provide information concerning the clot extent with sufficient image quality. PMID: 30862169 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 12, 2019 Category: Radiology Authors: Hoelter P, Goelitz P, Lang S, Luecking H, Kalmuenzer B, Struffert T, Doerfler A Tags: Acta Radiol Source Type: research

Prostatic artery embolization (PAE) in catheter-dependent patients with large prostatic (BPH) glands ( > 90 cc): early intervention essential.
CONCLUSION: PAE is very successful in allowing spontaneous voiding in men with obstructing BPH requiring a urethral catheter. However, the PAE should be performed as soon as possible after the urethral catheter is inserted. Direct referral from acute urology services or emergency departments once the catheter is inserted are warranted. PMID: 30845814 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 7, 2019 Category: Radiology Authors: Tapping CR, Boardman P Tags: Acta Radiol Source Type: research

Distal radius fractures and radiographic assessment: a systematic review of measurement accuracy.
CONCLUSION: Currently, evidence is not available to support accuracy of the radiographic measurements commonly used to characterize distal radius fractures. PMID: 30845815 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 7, 2019 Category: Radiology Authors: Jensen J, Rasmussen BS, Duus LA, Torfing T, Precht H, Tromborg H, Graumann O Tags: Acta Radiol Source Type: research

Self-citations in musculoskeletal radiology: frequency and pattern analysis.
CONCLUSION: Self-citations in musculoskeletal radiology is no different than other medical fields. It does not currently seem to pose a threat on the integrity of scientific research and is usually needed to expand on previous knowledge. Nevertheless, authors and journals should be aware of implications of abusing such practice on future medical research. PMID: 30845816 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 7, 2019 Category: Radiology Authors: Dessouky R, Zhang L, Wadhwa V, Xi Y, Chhabra A Tags: Acta Radiol Source Type: research

A 3D quantitative imaging biomarker in pre-treatment MRI predicts overall survival after stereotactic radiation therapy of patients with a singular brain metastasis.
Abstract BACKGROUND: Brain metastases (BM) are the most frequent intracranial malignant tumor. Various prognostic factors facilitate the prediction of survival; however, few have become tools for clinical use. PURPOSE: To investigate the role of three-dimensional (3D) quantitative tissue enhancement in pre-treatment cranial magnetic resonance imaging (MRI) as a radiomic biomarker for survival (OS) in patients with singular BM treated with stereotactic radiation therapy (SRT). MATERIAL AND METHODS: In this retrospective study, 48 patients (27 non-small cell lung cancer and 21 melanoma) with singular BM tr...
Source: Acta Radiologica - March 6, 2019 Category: Radiology Authors: Della Seta M, Collettini F, Chapiro J, Angelidis A, Engeling F, Hamm B, Kaul D Tags: Acta Radiol Source Type: research

Radiological prizes awarded in 2018.
Authors: PMID: 30832490 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - March 4, 2019 Category: Radiology Tags: Acta Radiol Source Type: research

Computerized texture analysis predicts histological invasiveness within lung adenocarcinoma manifesting as pure ground-glass nodules.
CONCLUSION: In patients with pGGN, computerized texture analysis has the potential to differentiate histological invasiveness; maximum 3D diameter, surface volume ratio, and zone entropy in particular are independent differentiators of IACs from AISs and MIAs. PMID: 30818977 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 28, 2019 Category: Radiology Authors: Yang Y, Wang WW, Ren Y, Jin XQ, Zhu QD, Peng CT, Liu HQ, Zhang JH Tags: Acta Radiol Source Type: research

Nondisplaced fractures on hip CT: added value of dual-energy CT virtual non-calcium imaging for detection of bone marrow edema using visual and quantitative analyses.
CONCLUSION: Visual and quantitative analyses of VNCa images may be useful in detection of non-displaced fractures in the proximal femur and in pelvic bones. PMID: 30818978 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 28, 2019 Category: Radiology Authors: Jang SW, Chung BM, Kim WT, Gil JR Tags: Acta Radiol Source Type: research

Tumor heterogeneity in oral and oropharyngeal squamous cell carcinoma assessed by texture analysis of CT and conventional MRI: a potential marker of overall survival.
Abstract BACKGROUND: The combined prognostic value of texture analysis on computed tomography (CT) and conventional magnetic resonance imaging (MRI) in oral and oropharyngeal squamous cell carcinoma (OOSCC) has rarely been reported. PURPOSE: To evaluate the ability of texture-based heterogeneity indices extracted from CT and conventional MRI to predict the overall survival (OS) of OOSCC patients. MATERIAL AND METHODS: Eighty-eight patients with OOSCC underwent contrast-enhanced CT, and T2-weighted (T2W) and contrast-enhanced T1-weighted (T1W) imaging. For each imaging protocol, four histogram (HISTO) and...
Source: Acta Radiologica - February 28, 2019 Category: Radiology Authors: Ren J, Yuan Y, Shi Y, Tao X Tags: Acta Radiol Source Type: research

Reference values and variation of acetabular angles measured by computed tomography in 170 asymptomatic hips.
CONCLUSION: We found considerable variation in the values for acetabular angles. There were gender differences in the sector angles and for the AcAV. Knowledge of reference values is important when we attempt to diagnose the pathological hip conditions. PMID: 30818980 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 28, 2019 Category: Radiology Authors: Mechlenburg I, Stilling M, Rømer L, de Bruijne M, Søballe K, de Raedt S Tags: Acta Radiol Source Type: research

A universal phantom suitable for quality assurance on X-ray imaging modalities.
CONCLUSION: It may be concluded that the U-QA phantom, with accompanying data analysis software and user's manual, offers an acceptable single phantom solution for medical X-ray imaging. It is a cost and time saver and could therefore fill a gap in the existing market. The phantom could also be used by radiographers in resource-limited institutions. PMID: 30813735 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 27, 2019 Category: Radiology Authors: Groenewald A, Groenewald WA Tags: Acta Radiol Source Type: research

Differentiation of renal angiomyolipoma without visible fat from renal cell carcinoma by machine learning based on whole-tumor computed tomography texture features.
CONCLUSION: Machine learning can be a useful non-invasive technique for differentiating AMLwvf from all-RCC, ccRCC, and non-ccRCC, and it can be more accurate than morphological interpretation by radiologists. PMID: 30799634 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 24, 2019 Category: Radiology Authors: Cui EM, Lin F, Li Q, Li RG, Chen XM, Liu ZS, Long WS Tags: Acta Radiol Source Type: research

Multi-phase coronary magnetic resonance angiography improves delineation of coronary arteries.
CONCLUSION: The 3D multi-phase CMRA approach allows a time efficient depiction of the coronary arteries and a coeval functional assessment, with an improved vessel sharpness of the coronaries. PMID: 30799635 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 24, 2019 Category: Radiology Authors: Zitzelsberger T, Krumm P, Hornung A, Kramer U, Nikolaou K, Schäfer JF, Schick F, Sieverding L, Martirosian P Tags: Acta Radiol Source Type: research

Distinguishing metastases from benign adrenal masses: what can CT texture analysis do?
Abstract BACKGROUND: Computed tomography texture analysis (CTTA) has gained an increasing role in oncology and has successfully demonstrated to reflect biological associations with glucose metabolism, hypoxia, angiogenesis, and even genetic variation. PURPOSE: To determine whether quantitative CTTA can be used to differentiate metastases from benign adrenal masses on single energy CT images. MATERIAL AND METHODS: A total of 225 patients with 265 histologically confirmed adrenal masses (101 metastases, 98 pheochromocytomas, and 66 lipid-poor adenomas) were included in this retrospective study. CTTA was pe...
Source: Acta Radiologica - February 24, 2019 Category: Radiology Authors: Shi B, Zhang GM, Xu M, Jin ZY, Sun H Tags: Acta Radiol Source Type: research

Clinical experience of magnetic resonance imaging in patients with cardiac pacing devices: unrestricted patient population.
CONCLUSION: MRI scans can be performed safely in patients with cardiac pacing devices if the dedicated safety protocol is followed. PMID: 30781967 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 19, 2019 Category: Radiology Authors: Vuorinen AM, Pakarinen S, Jaakkola I, Holmström M, Kivistö S, Kaasalainen T Tags: Acta Radiol Source Type: research

Feasibility of reduced-dose CT of the head and neck with iterative reconstruction: a phantom and prospective clinical study.
Abstract BACKGROUND: There is growing concern over computed tomography (CT)-related radiation exposure, particularly in patients requiring head and neck CT due to the proximity of radiosensitive organs. PURPOSE: We aimed to evaluate the feasibility of reduced-dose CT of the head and neck with iterative reconstruction in a phantom and patient study. MATERIAL AND METHODS: In the phantom study, low-contrast resolution test of the American Association of Physicists in Medicine CT performance phantom was scanned to determine the lowest acceptable tube current (mAs). In the patient study, three sets of CT imag...
Source: Acta Radiologica - February 18, 2019 Category: Radiology Authors: Chung MS, Choi YJ, Hwang JY, Yoon DH, Seo KJ, Lee JH, Baek JH Tags: Acta Radiol Source Type: research

Value of diffusion-weighted imaging combined with conventional magnetic resonance imaging in the diagnosis of thecomas and their differential diagnosis with adult granulosa cell tumors.
Abstract BACKGROUND: Magnetic resonance imaging (MRI) is a significant method of identifying ovarian tumors, when combined with certain functional imaging techniques that have been considered to be more accurate. PURPOSE: Our study aims to determine the value of diffusion-weighted imaging (DWI) combined with MRI in the diagnosis of thecomas and adult ovarian granulosa cell tumors (GCTs). MATERIAL AND METHODS: In total, this study included 10 patients with thecomas and nine with adult GCTs. We analyzed the clinical characteristics, conventional MRI, and apparent diffusion coefficient (ADC) values of two g...
Source: Acta Radiologica - February 18, 2019 Category: Radiology Authors: Fang M, Dong J, Zhong Q, Fang X, Chen Y, Wang C, Yan H Tags: Acta Radiol Source Type: research

Microbubble contrast-enhanced ultrasound in the vascular evaluation after pancreas transplantation: a single-center experience.
Abstract BACKGROUND: Arterial and venous thrombosis are feared complications of pancreas transplantation (PTx). Microbubble contrast-enhanced ultrasound (CEUS) is a non-invasive imaging technique that can augment diagnostic capabilities of transplant organ perfusion. PURPOSE: To document the state to which CEUS can improve the vascular evaluation of PTx compared to conventional Doppler ultrasound (US) directly after surgery. MATERIAL AND METHODS: A total of 129 consecutive PTx in 128 adult patients were eligible for inclusion. The duodenal segment of the graft was anastomosed to the native duodenum. With...
Source: Acta Radiologica - February 12, 2019 Category: Radiology Authors: Berstad AE, Brabrand K, Horneland R, Syversveen T, Haugaa H, Jenssen TG, Foss A Tags: Acta Radiol Source Type: research

Early functional outcomes following in-bore transrectal MR image-guided focal laser ablation for men with benign prostatic hyperplasia at one year.
CONCLUSION: MRI-guided FLA of BPH appears to offer rapid relief of symptoms while maintaining normal prostate and sexual function. PMID: 30754981 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 12, 2019 Category: Radiology Authors: Sperling DS, Farbstein A, Farbstein S, Gentile JC Tags: Acta Radiol Source Type: research

Quantitative and qualitative evaluation of low-dose craniocervical computed tomography angiography with a lower tube voltage protocol.
CONCLUSION: In CCCTA, the 100-kVp protocol increased arterial enhancement, reduced the radiation dose, and would not cause prominent streak artifacts. This protocol should be considered for CCCTA. PMID: 30732454 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 7, 2019 Category: Radiology Authors: Chen PA, Chen CW, Chou CC, Fu JH, Wang PC, Hsu SH, Lai PH Tags: Acta Radiol Source Type: research

High-resolution vessel wall magnetic resonance imaging of carotid and intracranial vessels.
Abstract Carotid and intracranial imaging play an essential role in the comprehensive evaluation and prevention for stroke patients. High-resolution vessel wall magnetic resonance imaging (HR VW-MRI) has been applied in carotid and intracranial arteries with optimal ability in displaying the features of various vascular diseases. Recent advanced MRI techniques can not only help in the differential diagnosis of vascular diseases but can also provide information on pathogenesis exploration of underlying mechanisms, follow-up monitoring, and determination of prognosis for patients with cerebral strokes. The aim of th...
Source: Acta Radiologica - February 6, 2019 Category: Radiology Authors: Sui B, Gao P Tags: Acta Radiol Source Type: research

Epicardial fat, left ventricular strain, and T1-relaxation times in obese individuals with a normal ejection fraction.
Abstract BACKGROUND: Cardiac magnetic resonance (CMR) may detect early signs of cardiomyopathy. PURPOSE: The purpose of this CMR study was to evaluate epicardial fat volume (EFV), T1-relaxation times (T1), and left ventricular (LV) strain in non-obese (30 kg/m2) individuals with no other cardiovascular risk factor and with a normal LV ejection fraction (LVEF) to detect early changes of obesity cardiomyopathy. MATERIAL AND METHODS: Seventy-five individuals (38 men) without additional cardiovascular risk factors were examined at 1.5 T. EFV was assessed by a 3D-Dixon sequence. A 3(3)3(3)5 MOLLI schem...
Source: Acta Radiologica - February 6, 2019 Category: Radiology Authors: Homsi R, Yuecel S, Schlesinger-Irsch U, Meier-Schroers M, Kuetting D, Luetkens J, Sprinkart A, Schild HH, Thomas DK Tags: Acta Radiol Source Type: research

Deformation of breast masses between supine ultrasound and prone magnetic resonance imaging.
Abstract BACKGROUND: Breast masses will deform between different postures and modalities in the background mammary gland. However, this difference in deformation between benign and malignant masses has not been studied. PURPOSE: To investigate the feasibility of using the change of the longitudinal-transverse ratio (L/T) of a breast mass from supine ultrasonography (US) and prone magnetic resonance imaging (MRI) as representing deformation in differentiating between benign and malignant masses. MATERIAL AND METHODS: The participants were 197 consecutive patients with 201 breast masses (55 benign, 146 mal...
Source: Acta Radiologica - February 6, 2019 Category: Radiology Authors: Yoshida M, Goto M, Sakai K, Kiba M, Nagano H, Yamada K Tags: Acta Radiol Source Type: research

Apparent diffusion coefficients are closely related with high-risk human papilloma virus infection in cervical squamous cell carcinoma patients.
CONCLUSION: ADC value is related with the HR-HPV infection in patients with CSCC and DWI may be used for predicting HR-HPV infection in patients with CSCC. PMID: 30722670 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - February 5, 2019 Category: Radiology Authors: Zhou G, Chen X, Shen R, Xu J, Wang Y, Yu H Tags: Acta Radiol Source Type: research

Is FDG maximum standardized uptake value of primary breast cancer a prognostic factor for locoregional axillary lymph node metastasis?
Abstract BACKGROUND: 18F-fluoro-2-deoxy-D-glucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) has been widely used for diagnosis and staging of disease recurrence in breast cancer patients. PURPOSE: To determine the validity of 18F-FDG PET/CT maximum standardized uptake value (SUVmax) of primary breast cancer (SUVmax-T) as a prognostic factor for locoregional axillary lymph node metastasis (ALNM). MATERIAL AND METHODS: We prospectively studied 198 female patients with pathologically proven breast cancer. All patients were submitted to 18F-FDG PET/CT imaging for their initial tumor...
Source: Acta Radiologica - February 4, 2019 Category: Radiology Authors: Refaat R, Abd Alkhalik Basha M, Sobhi Hassan M, Hussein RS, Al-Molla RM, Awad NM, Elkholy E Tags: Acta Radiol Source Type: research

Corrigendum.
Authors: PMID: 30623666 [PubMed - in process] (Source: Acta Radiologica)
Source: Acta Radiologica - January 10, 2019 Category: Radiology Tags: Acta Radiol Source Type: research

Assessing sizes of breast cancers that show non-mass enhancement on MRI based on inter-observer variability and comparison with pathology size.
CONCLUSION: The size assessments of NME breast cancer on MRI showed high correlation between observers and with pathology size. However, MRI measurements need a cautious approach because of their high overestimation rates. Measurements from early T1 images showed the highest concordance rate with pathology size. PMID: 30621441 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - January 8, 2019 Category: Radiology Authors: Koh J, Park AY, Ko KH, Kim S, Kyoung Jung H Tags: Acta Radiol Source Type: research

Noise reduction and image quality in ultra-high resolution computed tomography of the temporal bone using advanced modeled iterative reconstruction.
Abstract BACKGROUND: The novel advanced modeled iterative reconstruction (ADMIRE) algorithm in ultra-high-resolution (UHR) computed tomography (CT) of the temporal bone has not yet been systematically evaluated. PURPOSE: To assess the potential of ADMIRE in temporal bone UHR CT. MATERIAL AND METHODS: Forty-four patients who underwent UHR CT of the temporal bone using z-axis UHR protocol were retrospectively selected for analysis. Images were reconstructed using filtered back projection (FBP) and ADMIRE with multiple strength levels. Regions of interest were drawn in the posterior fossa and petrous bone. ...
Source: Acta Radiologica - January 8, 2019 Category: Radiology Authors: Hempel JM, Niklas Bongers M, Braun K, Ernemann U, Bier G Tags: Acta Radiol Source Type: research

Quantitative T2-mapping using MRI for detection of prostate malignancy: a systematic review of the literature.
Abstract Quantitative T2-mapping using magnetic resonance imaging (MRI) allows measurement of tissue T2-relaxation times to complement anatomical and spatial information derived from T2-weighted imaging. Studies have shown varying T2-relaxation times between prostate malignancy and non-malignant prostatic tissue. This paper aims to critically review the literature in a systematic review, to determine the usefulness of T2-mapping in the evaluation of prostate malignancy. A literature search of PubMed and Embase databases was performed. There were 17 studies, up to 31 June 2018, that measured T2-relaxation times of ...
Source: Acta Radiologica - January 8, 2019 Category: Radiology Authors: Chau Hung L Tags: Acta Radiol Source Type: research

Texture in the monitoring of regorafenib therapy in patients with colorectal liver metastases.
CONCLUSIONS: In this exploratory study, we demonstrated substantial changes in the texture parameters during treatment with regorafenib, most evident in the unfiltered dataset of the PVP-CT. Some texture parameters showed prognostic association with OS. Texture may potentially help evaluate the treatment response in patients treated with regorafenib. PMID: 30612433 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - January 6, 2019 Category: Radiology Authors: Andersen IR, Thorup K, Andersen MB, Olesen R, Mortensen FV, Nielsen DT, Rasmussen F Tags: Acta Radiol Source Type: research

Practice variations in salivary gland imaging and utility of virtual unenhanced dual energy CT images for the detection of major salivary gland stones.
CONCLUSION: This study confirms that there are significant variations in CT protocols used for evaluation of sialolithiasis. A single contrast-enhanced DECT acquisition with reconstruction of VUE may represent an attractive, streamlined alternative and enable the elimination of the true unenhanced phase and associated radiation exposure. PMID: 30539647 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - December 12, 2018 Category: Radiology Authors: Beland B, Levental M, Srinivasan A, Forghani R Tags: Acta Radiol Source Type: research

Intramedullary spinal tumor-like lesions.
ska M Abstract The development of magnetic resonance imaging (MRI) has led to an increasingly frequent detection of changes in the spinal cord. The most common intramedullary lesions are: demyelinating; vascular; inflammatory; infectious; and congenital, largely called tumor-like lesions. Spinal cord tumors are relatively rare, as compared with brain tumors. The hardest task is to conclude whether the spinal cord lesion is a tumor or a tumor-like lesion. This review is intended to help evaluate the spinal cord and gives an overview of the tumor-like lesions occurring in the spinal cord along with their characteris...
Source: Acta Radiologica - December 11, 2018 Category: Radiology Authors: Maj E, Wójtowicz K, Aleksandra, Podlecka-Piȩtowska, Prokopienko M, Marchel A, Rowiński O, Bekiesińska-Figatowska M Tags: Acta Radiol Source Type: research

Comparison of two-view digital breast tomosynthesis to three-view digital mammography in a simulated screening setting.
CONCLUSION: In this retrospective initial study, the detection performance of two-view DBT and three-view DM were statistically equivalent. Future studies should determine whether three-view DM is a viable alternative to DBT for screening, given its cost and work-flow. PMID: 30525870 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - December 10, 2018 Category: Radiology Authors: Kim YJ, Sechopoulos I, Newell MS, Ho CP, Holbrook AI, Fleming M, Hamlin MB, Handa P, Braykov N, D'Orsi CJ Tags: Acta Radiol Source Type: research

Lung cancer detected on coronary artery calcium scoring computed tomography: factors delaying diagnosis and predictors of survival.
Abstract BACKGROUND: Lung cancers are occasionally detected on coronary artery calcium (CAC)-scoring computed tomography (CT). However, the cause of delayed diagnosis and prognostic factors have not been studied. PURPOSE: To investigate the causes of delayed diagnosis of lung cancer in patients who undergo CAC-scoring CT and to identify predictors of mortality. MATERIAL AND METHODS: A total of 151 patients who were diagnosed with lung cancer and had undergone CAC-scoring CT from January 2010 to December 2014 were retrospectively enrolled. The reasons for delayed diagnosis were reviewed. Follow-up data on...
Source: Acta Radiologica - November 30, 2018 Category: Radiology Authors: Kim JY, Suh YJ, Nam K, Choi BW Tags: Acta Radiol Source Type: research

Alternations of interhemispheric functional connectivity in corneal ulcer patients using voxel-mirrored homotopic connectivity: a resting state fMRI study.
Abstract BACKGROUND: Corneal ulcer (CU) is the second ocular disease leading to blindness. Millions of people around the world suffer from CU. However, the relationship between CU and altered functional connectivity in the brain is still unknown. PURPOSE: The aim of the present study was to investigate the alterations of the brain interhemispheric functional connectivity (FC) in patients with CU using the voxel-mirrored homotopic connectivity (VMHC) method and their relationship with clinical manifestations. MATERIAL AND METHODS: The present study involved 24 patients with CU (12 men, 12 women) and 24 he...
Source: Acta Radiologica - November 27, 2018 Category: Radiology Authors: Shi WQ, Liu JX, Yuan Q, Ye L, Su T, Jiang N, Lin Q, Min YL, Li B, Zhu PW, Xu XW, Shao Y Tags: Acta Radiol Source Type: research

Application of whole-lesion intravoxel incoherent motion analysis using iZOOM DWI to differentiate malignant from benign thyroid nodules.
CONCLUSION: IVIM parameter D derived from iZOOM DWI may be helpful in differentiating malignant from benign thyroid nodules. PMID: 30458628 [PubMed - as supplied by publisher] (Source: Acta Radiologica)
Source: Acta Radiologica - November 20, 2018 Category: Radiology Authors: Song MH, Jin YF, Guo JS, Zuo L, Xie H, Shi K, Yue YL Tags: Acta Radiol Source Type: research