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Radiology Research and Practice

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https://www.readbyqxmd.com/read/27610244/the-disruption-of-geniculocalcarine-tract-in-occipital-neoplasm-a-diffusion-tensor-imaging-study
#1
Yan Zhang, Sihai Wan, Ge Wen, Xuelin Zhang
Aim. Investigate the disruption of geniculocalcarine tract (GCT) in different occipital neoplasm by diffusion tensor imaging (DTI). Methods. Thirty-two subjects (44.1 ± 3.6 years) who had single occipital neoplasm (9 gliomas, 6 meningiomas, and 17 metastatic tumors) with ipsilateral GCT involved and thirty healthy subjects (39.2 ± 3.3 years) underwent conventional sequences scanning and diffusion tensor imaging by a 1.5T MR scanner. The diffusion-sensitive gradient direction is 13. Compare the fractional anisotropy (FA) and mean diffusivity (MD) values of healthy GCT with the corresponding values of GCT in peritumoral edema area...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27547451/automated-determination-of-arterial-input-function-for-dynamic-susceptibility-contrast-mri-from-regions-around-arteries-using-independent-component-analysis
#2
Sharon Chen, Yu-Chang Tyan, Jui-Jen Lai, Chin-Ching Chang
Purpose. Quantitative cerebral blood flow (CBF) measurement using dynamic susceptibility contrast- (DSC-) MRI requires accurate estimation of the arterial input function (AIF). The present work utilized the independent component analysis (ICA) method to determine the AIF in the regions adjacent to the middle cerebral artery (MCA) by the alleviated confounding of partial volume effect. Materials and Methods. A series of spin-echo EPI MR scans were performed in 10 normal subjects. All subjects received 0.2 mmol/kg Gd-DTPA contrast agent...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27471601/novel-pattern-of-iron-deposition-in-the-fascicula-nigrale-in-patients-with-parkinson-s-disease-a-pilot-study
#3
Miriam E Peckham, Khashayar Dashtipour, Barbara A Holshouser, Camellia Kani, Alex Boscanin, Kayvan Kani, Sheri L Harder
Background and Purpose. To determine whether the pattern of iron deposition in the fascicula nigrale in patients with Parkinson's disease would be different from age-matched controls by utilizing quantitative susceptibility mapping to measure susceptibility change. Methods. MRIs of the brain were obtained from 34 subjects, 18 with Parkinson's disease and 16 age- and gender-matched controls. Regions of interest were drawn around the fascicula nigrale and substantia nigra using SWI mapping software by blinded investigators...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27313891/anatomical-variations-of-cystic-ducts-in-magnetic-resonance-cholangiopancreatography-and-clinical-implications
#4
Radha Sarawagi, Shyam Sundar, Sanjeev K Gupta, Sameer Raghuwanshi
Background. Anatomical variations of cystic duct (CD) are frequently unrecognized. It is important to be aware of these variations prior to any surgical, percutaneous, or endoscopic intervention procedures. Objectives. The purpose of our study was to demonstrate the imaging features of CD and its variants using magnetic resonance cholangiopancreatography (MRCP) and document their prevalence in our population. Materials and Methods. This study included 198 patients who underwent MRCP due to different indications...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27242926/evaluation-of-clinical-alvarado-scoring-system-and-ct-criteria-in-the-diagnosis-of-acute-appendicitis
#5
Idil Gunes Tatar, Kerim Bora Yilmaz, Alpaslan Sahin, Hasan Aydin, Melih Akinci, Baki Hekimoglu
Aim. The aim was to evaluate the clinical Alvarado scoring system and computed tomography (CT) criteria for the diagnosis of acute appendicitis. Material and Methods. 117 patients with acute abdominal pain who underwent abdominal CT were enrolled in this retrospective study. Patient demographics, clinical Alvarado scoring, CT images, and pathologic results of the patients were evaluated. Results. 39 of the 53 patients who were operated on had pathologically proven acute appendicitis. CT criteria of appendiceal diameter, presence of periappendiceal inflammation, fluid, appendicolith, and white blood cell (WBC) count were significantly correlated with the inflammation of the appendix...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27190647/preoperative-quantitative-mr-tractography-compared-with-visual-tract-evaluation-in-patients-with-neuropathologically-confirmed-gliomas-grades-ii-and-iii-a-prospective-cohort-study
#6
Anna F Delgado, Markus Nilsson, Francesco Latini, Johanna Mårtensson, Maria Zetterling, Shala G Berntsson, Irina Alafuzoff, Jimmy Lätt, Elna-Marie Larsson
Background and Purpose. Low-grade gliomas show infiltrative growth in white matter tracts. Diffusion tensor tractography can noninvasively assess white matter tracts. The aim was to preoperatively assess tumor growth in white matter tracts using quantitative MR tractography (3T). The hypothesis was that suspected infiltrated tracts would have altered diffusional properties in infiltrated tract segments compared to noninfiltrated tracts. Materials and Methods. Forty-eight patients with suspected low-grade glioma were included after written informed consent and underwent preoperative diffusion tensor imaging in this prospective review-board approved study...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27069686/contrast-induced-nephropathy-with-intravenous-iodinated-contrast-media-in-routine-diagnostic-imaging-an-initial-experience-in-a-tertiary-care-hospital
#7
Shuchi Bhatt, Nipun Rajpal, Vineeta Rathi, Rajneesh Avasthi
Background. Contrast induced nephropathy (CIN) is common cause of hospital acquired renal failure, defined as iatrogenic deterioration of renal function following intravascular contrast administration in the absence of another nephrotoxic event. Objectives. Objectives were to calculate incidence of CIN with routine IV contrast usage and to identify its risk factors. Materials and Methods. Study was conducted on 250 patients (having eGFR ≥ 45 mL/min/1.73 m(2)) receiving intravenous contrast. Various clinical risk factors and details of contrast media were recorded...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27069685/contrast-medium-induced-nephropathy-after-endovascular-stent-graft-placement-an-examination-of-its-prevalence-and-risk-factors
#8
Yohei Kawatani, Yoshitsugu Nakamura, Yoshihiko Mochida, Naoya Yamauchi, Yujiro Hayashi, Tetsuyoshi Taneichi, Yujiro Ito, Hirotsugu Kurobe, Yuji Suda, Takaki Hori
Endovascular stent graft placement has become a major treatment for thoracic and abdominal aneurysms. While endovascular therapy is less invasive than open surgery, it involves the use of a contrast medium. Contrast media can cause renal impairment, a condition termed as contrast-induced nephropathy (CIN). This study sought to evaluate the incidence and risk factors of CIN following endovascular stent graft placement for aortic aneurysm repair. The study included 167 consecutive patients who underwent endovascular stent graft placement in our hospital from October 2013 to June 2014...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27057352/a-current-review-of-the-meniscus-imaging-proposition-of-a-useful-tool-for-its-radiologic-analysis
#9
REVIEW
Nicolas Lefevre, Jean Francois Naouri, Serge Herman, Antoine Gerometta, Shahnaz Klouche, Yoann Bohu
The main objective of this review was to present a synthesis of the current literature in order to provide a useful tool to clinician in radiologic analysis of the meniscus. All anatomical descriptions were clearly illustrated by MRI, arthroscopy, and/or drawings. The value of standard radiography is extremely limited for the assessment of meniscal injuries but may be indicated to obtain a differential diagnosis such as osteoarthritis. Ultrasound is rarely used as a diagnostic tool for meniscal pathologies and its accuracy is operator-dependent...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27034831/diffusion-weighted-imaging-with-color-coded-images-towards-a-reduction-in-reading-time-while-keeping-a-similar-accuracy
#10
Felipe Campos Kitamura, Srhael de Medeiros Alves, Luis Antônio Tobaru Tibana, Nitamar Abdala
The aim of this study was to develop a diagnostic tool capable of providing diffusion and apparent diffusion coefficient (ADC) map information in a single color-coded image and to assess the performance of color-coded images compared with their corresponding diffusion and ADC map. The institutional review board approved this retrospective study, which sequentially enrolled 36 head MRI scans. Diffusion-weighted images (DWI) and ADC maps were compared to their corresponding color-coded images. Four raters had their interobserver agreement measured for both conventional (DWI) and color-coded images...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27034830/decreased-brain-and-placental-perfusion-in-omphalopagus-conjoined-twins-on-fetal-mri
#11
Sureyya Burcu Gorkem, Mehmet Serdar Kutuk, Selim Doganay, Tamer Gunes, Karamehmet Yildiz, Mustafa Kucukaydin
The aim of this study is to evaluate perfusional changes in brain and placenta of omphalopagus conjoined twins and to compare them with singleton fetuses by using diffusion weighted imaging and apparent diffusion coefficient. Fetal MRIs of 28-week-old omphalopagus conjoined twins with a shared liver with two separate gallbladders and portal and hepatic venous systems and three singleton fetuses with unilateral borderline ventriculomegaly at the same gestational week as control group were enrolled retrospectively...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/27006830/morphologic-and-clinical-outcome-of-intracranial-aneurysms-after-treatment-using-flow-diverter-devices-mid-term-follow-up
#12
Anna-Katharina Breu, Till-Karsten Hauser, Florian H Ebner, Felix Bischof, Ulrike Ernemann, Achim Seeger
Flow diverters (FDs) are designed for the endovascular treatment of complex intracranial aneurysm configurations. From February 2009 to March 2013 28 patients (22 females, 6 males) were treated with FD; mean age was 57 years. Data, including aneurysm features, clinical presentation, history of previous bleeding, treatment, and follow-up results, are presented. Early postinterventional neurological deficits (transient: n = 3/enduring: n = 1) appeared in 4/28 patients (14%), and early improvement of neurological symptoms was observed in 7 patients with previous restriction of cranial nerve function...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/26885391/imaging-of-hip-pain-from-radiography-to-cross-sectional-imaging-techniques
#13
REVIEW
Fernando Ruiz Santiago, Alicia Santiago Chinchilla, Afshin Ansari, Luis Guzmán Álvarez, Maria Del Mar Castellano García, Alberto Martínez Martínez, Juan Tercedor Sánchez
Hip pain can have multiple causes, including intra-articular, juxta-articular, and referred pain, mainly from spine or sacroiliac joints. In this review, we discuss the causes of intra-articular hip pain from childhood to adulthood and the role of the appropriate imaging techniques according to clinical suspicion and age of the patient. Stress is put on the findings of radiographs, currently considered the first imaging technique, not only in older people with degenerative disease but also in young people without osteoarthritis...
2016: Radiology Research and Practice
https://www.readbyqxmd.com/read/26858846/ultrasound-findings-in-hand-joints-involvement-in-patients-with-psoriatic-arthritis-and-its-correlation-with-clinical-das28-score
#14
Priyanka Naranje, Mahesh Prakash, Aman Sharma, Sunil Dogra, Niranjan Khandelwal
Objective. To determine the frequency of the various ultrasound findings in hand joints in patients with psoriatic arthritis and correlate grayscale and Power Doppler ultrasonography findings with Disease Activity Score 28. Methods. This prospective study was performed in 30 patients. Ultrasound evaluation of 28 joints of both hands was undertaken and various findings were recorded including synovial hypertrophy, Power Doppler abnormality, soft tissue thickening, tendonitis, joint effusion, periosteal reaction, and erosions...
2015: Radiology Research and Practice
https://www.readbyqxmd.com/read/26858845/congenital-extrahepatic-portosystemic-shunts-spectrum-of-findings-on-ultrasound-computed-tomography-and-magnetic-resonance-imaging
#15
REVIEW
Pankaj Gupta, Anindita Sinha, Kushaljit Singh Sodhi, Anupam Lal, Uma Debi, Babu R Thapa, Niranjan Khandelwal
Congenital extrahepatic portosystemic shunt (CEPS) is a rare disorder characterised by partial or complete diversion of portomesenteric blood into systemic veins via congenital shunts. Type I is characterised by complete lack of intrahepatic portal venous blood flow due to an end to side fistula between main portal vein and the inferior vena cava. Type II on the other hand is characterised by partial preservation of portal blood supply to liver and side to side fistula between main portal vein or its branches and mesenteric, splenic, gastric, and systemic veins...
2015: Radiology Research and Practice
https://www.readbyqxmd.com/read/26798515/imaging-modalities-to-identity-inflammation-in-an-atherosclerotic-plaque
#16
REVIEW
Sunny Goel, Avraham Miller, Chirag Agarwal, Elina Zakin, Michael Acholonu, Umesh Gidwani, Abhishek Sharma, Guy Kulbak, Jacob Shani, On Chen
Atherosclerosis is a chronic, progressive, multifocal arterial wall disease caused by local and systemic inflammation responsible for major cardiovascular complications such as myocardial infarction and stroke. With the recent understanding that vulnerable plaque erosion and rupture, with subsequent thrombosis, rather than luminal stenosis, is the underlying cause of acute ischemic events, there has been a shift of focus to understand the mechanisms that make an atherosclerotic plaque unstable or vulnerable to rupture...
2015: Radiology Research and Practice
https://www.readbyqxmd.com/read/26640710/mechanical-recanalization-following-i-v-thrombolysis-a-retrospective-analysis-regarding-secondary-hemorrhagic-infarctions-and-parenchymal-hematomas
#17
J Höltje, F Bonk, A Anstadt, C Terborg, C Pohlmann, P P Urban, R Brüning
Introduction. In acute stroke by occlusion of the proximal medial cerebral artery (MCA) or the distal internal carotid artery, intravenous thrombolysis is an established treatment. Another option is mechanical recanalization. It remains unclear if the combination of both methods poses an additional bleeding risk. The aim of this retrospective analysis is to determine the proportion of hemorrhagic infarctions and parenchymal hematomas. Methods. Inclusion criteria were an occlusion of the carotid T or proximal MCA treated with full dose thrombolysis and mechanical recanalization...
2015: Radiology Research and Practice
https://www.readbyqxmd.com/read/26609432/cone-beam-computed-tomography-evaluation-of-mental-foramen-variations-a-preliminary-study
#18
Mahnaz Sheikhi, Mitra Karbasi Kheir, Ehsan Hekmatian
Background. Mental foramen is important in surgical operations of premolars because it transfers the mental nerves and vessels. This study evaluated the variations of mental foramen by cone-beam computed tomography among a selected Iranian population. Materials and Methods. A total number of 180 cone-beam computed tomography projections were analyzed in terms of shape, size, direction, and horizontal and vertical positions of mental foramen in the right and left sides. Results. The most common shape was oval, opening direction was posterior-superior, horizontal position was in line with second premolar, and vertical position was apical to the adjacent dental root...
2015: Radiology Research and Practice
https://www.readbyqxmd.com/read/26576300/intravenous-contrast-medium-administration-for-computed-tomography-scan-in-emergency-a-possible-cause-of-contrast-induced-nephropathy
#19
Lantam Sonhaye, Bérésa Kolou, Mazamaesso Tchaou, Abdoulatif Amadou, Kouméabalo Assih, Bidamin N'Timon, Kokou Adambounou, Lama Agoda-Koussema, Komlavi Adjenou, Koffi N'Dakena
The goal of this study was to assess risk for CIN after CT Scan during an emergency and to identify risk factors for the patient. Prospective review of all patients admitted to the emergency room (ER) of the Teaching Hospital of Lomé (Togo) during a 2-year period. CIN was defined as an increase in serum creatinine by 0.5 mg/dL from admission after undergoing CT Scan with intravenous contrast. A total of 620 patients underwent a CT Scan in the emergency room using intravenous contrast and 672 patients took the CT Scan without intravenous contrast...
2015: Radiology Research and Practice
https://www.readbyqxmd.com/read/26421187/soft-tissue-masses-of-hand-a-radio-pathological-correlation
#20
Aditi Agarwal, Mahesh Prakash, Pankaj Gupta, Satyaswarup Tripathy, Nandita Kakkar, Radhika Srinivasan, Niranjan Khandelwal
Aim. To evaluate soft tissue masses of the hand with magnetic resonance imaging (MRI) and ultrasonography (USG) and to correlate imaging findings with pathological findings. Material and Methods. Thirty-five patients with soft tissue masses of the hand were evaluated with high resolution USG and contrast enhanced MRI of the hand, prospectively over a period of 2.5 years. The radiological diagnosis was then compared with cytology/histopathology. Results. There were a total of 19 (55%) females. The mean age was 27...
2015: Radiology Research and Practice
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