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Clinical Imaging

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https://www.readbyqxmd.com/read/28167282/comparison-of-low-dose-coronary-artery-calcium-scoring-using-low-tube-current-technique-and-hybrid-iterative-reconstruction-vs-filtered-back-projection
#1
Nada Sulaiman, Jeanette Soon, Jong Kwan Park, Christopher Naoum, Shaw-Hua Kueh, Philipp Blanke, Darra Murphy, Jennifer Ellis, Cameron J Hague, Jonathon Leipsic
INTRODUCTION: We sought to validate whether low dose CACS CT with hybrid IR (HIR) could replace standard dose filtered back projection (FBP). METHOD: We enrolled 100 patients to undergo low dose CACS CT with HIR, in addition to routine full dose FBP. RESULTS: No significant difference between full and low dose CT in Agatston score 138.2±360.6 vs. 137.3±356.4 (p=0.272) or calcium mass score 19±48.3 vs. 18.7±49 (p=0.8), respectively. Bland-Altman analysis showed no systematic bias...
February 2, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28196758/evaluation-of-image-quality-of-coronary-artery-plaque-with-rapid-kvp-switching-dual-energy-ct
#2
Yasutoshi Ohta, Shinichiro Kitao, Tomomi Watanabe, Junichi Kishimoto, Kazuhiro Yamamoto, Toshihide Ogawa
We evaluated the virtual monochromatic imaging (VMI) energy levels that maximize image quality of each coronary plaque component in dual-energy computed tomography angiography in 495 coronary segments (45 for each energy level). Maximal signal-to-noise ratios were different for plaque, lumen, fat, and surrounding tissue (p<0.05). Maximal contrast-to-noise ratios were observed at 70keV for calcified plaque (CP), non-calcified plaque (NCP), and fat in comparison with the lumen (p<0.05), and 70keV and 120keV for NCP in comparison with fat (p=0...
February 1, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28167284/isolated-pseudoabducens-palsy-in-acute-thalamic-stroke
#3
Mehdi Ghasemi, Nazish Riaz, Anna Bjornsdottir, David Paydarfar
Oculomotor abnormalities are rarely noted in thalamic strokes. We describe isolated right pseudoabducens palsy in a young patient with acute left thalamic infarction revealed by diffusion-weighted magnetic resonance imaging. The patient's horizontal diplopia and oculomotor palsy resolved within 3days. This case supports the hypothesis that a lesion can cause isolated esotropia by interrupting descending inhibitory convergence pathways that traverse the paramedian thalamus and decussate in the subthalamic region to innervate the contralateral third oculomotor nucleus...
February 1, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28214395/ossified-dysraphic-hamartoma-with-lipomyelocoele-lipomyelomeningocoele-a-rare-radiological-entity
#4
Sudha Bindu Tirumani, Raghavendra Prasad, Vijaya Kumari Mudunoor, Suman Chandra Aemjal, Harika Tirumani, Saurabh Rohatgi
Traditionally the presence of fat in closed spinal dysraphism has been referred to as spinal lipoma. Recent reports suggest that these spinal lesions are better described as spinal hamartomas due to the unencapsulated and infiltrating nature of the fat and presence of other heterotopic soft tissue. The presence of ossified bone in spinal hamartomas referred to as ossified dysraphic hamartoma, is extremely rare with only three case reports in literature, all associated with lipomyeloceles, none with lipomyelomeningoceles...
January 31, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28187354/laparoscopic-sleeve-gastrectomy-everything-the-radiologist-needs-to-know
#5
REVIEW
Tulay Ekinci, Marjorie W Stein, Fernanda S Mazzariol, Ellen L Wolf
Obesity has become an epidemic in the United States, and bariatric surgery is being increasingly performed for its management. There has been an increased number of laparoscopic sleeve gastrectomies performed for the treatment of morbid obesity due to its efficacy and lower complication rate compared to other bariatric surgical techniques. The authors discuss the surgical technique, review the imaging of normal and complicated sleeve gastrectomy, and highlight radiographic pitfalls.
January 31, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28196759/follow-up-mr-imaging-of-pi-rads-3-and-pi-rads-4-prostate-lesions
#6
Elke Hauth, Horst Jaeger, Horst Hohmuth, Meinrad Beer
OBJECTIVE: To determine the rate of malignancy after follow-up MR imaging of the prostate in PI-RADS 3 lesions without core biopsy and PI-RADS 4 lesions after negative initial core biopsy. MATERIALS AND METHODS: We performed follow-up MRI in 46/72 (64%) patients with PI-RADS 3 lesions and 26/72 (36%) patients with PI-RADS 4 lesions in baseline MRI. RESULTS: The rate of malignancy in PI-RADS 3 lesions was 4% (2/46) and in PI-RADS 4 lesions 69% (18/26)...
January 30, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28167283/pre-operative-renal-artery-embolization-and-suprarenal-ivc-filter-placement-for-prevention-of-fat-embolization-in-renal-angiomyolipoma-with-venous-extension
#7
Joshua Cornman-Homonoff, David Li, Marc Schiffman
Though generally considered benign, angiomyolipomas can invade through the renal vein into the inferior vena cava, putting patients at risk of catastrophic pulmonary fat embolization. Venous invasion is thus an indication for surgical resection but is thought to increase the risk of adverse operative outcomes including intraoperative hemorrhage and embolization of fat and/or tumor thrombus. We report a novel approach to mitigating these complications illustrated in the case of a 43-year-old woman with IVC-invasive renal AML who underwent successful radical nephrectomy after concurrent pre-operative renal artery embolization and placement of a retrievable suprarenal IVC filter...
January 26, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28160713/a-case-of-bronchial-granular-cell-tumor-in-a-pediatric-patient
#8
Yonah B Esterson, Morris C Edelman, Aaron M Lipskar, Lawrence R Glassman, Peter Assaad
Only nine cases of bronchial granular cell tumor have previously been reported in pediatric patients. We present a 15-year-old girl with acute-onset right shoulder pain, discovered to have a granular cell tumor causing bronchial stenosis and a cavitating post-obstructive right upper lobe pneumonia. The patient was treated with lobectomy. Bronchial granular cell tumors are benign neoplasms that typically present with recurrent pneumonia. Imaging may demonstrate an endobronchial lesion or an associated post-obstructive opacity, but diagnosis requires tissue sampling...
January 25, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28129606/pet-mr-versus-pet-ct-in-the-initial-staging-of-head-and-neck-cancer-using-a-trimodality-pet-ct-mr-system
#9
Tetsuro Sekine, Felipe de Galiza Barbosa, Felix P Kuhn, Irene A Burger, Paul Stolzmann, Gerhard F Huber, Spyros S Kollias, Gustav K von Schulthess, Patrick Veit-Haibach, Martin W Huellner
PURPOSE: To compare the diagnostic accuracy of PET+MR with PET/CT in the initial staging of head and neck cancer. MATERIALS AND METHODS: Contrast-enhanced PET/CT+MR was performed in 27 patients with newly diagnosed head and neck cancer. PET/CT and PET+MR were evaluated separately, and the TNM stage and factors influencing treatment were assessed. RESULTS: The TNM staging by PET+MR was comparable to PET/CT (T: p=0.331, N: p=0.453, M: p=0.034)...
January 17, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28126700/small-bowel-volvulus-in-pregnancy-with-associated-superior-mesenteric-artery-occlusion
#10
Yonah B Esterson, Robert Villani, Ronald A Dela Cruz, Barak Friedman, Gregory M Grimaldi
Here we report the case of a pregnant 28-year-old who presented with acute upper abdominal pain. CT demonstrated midgut volvulus with short segment occlusion of the superior mesenteric artery (SMA). Emergent detorsion of the small bowel was performed, at which time underlying intestinal malrotation was discovered. Following detorsion, the SMA had a bounding pulse and did not require thrombectomy or revascularization. Fewer than 25 cases of midgut volvulus during pregnancy have been reported over the past 20years...
January 16, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28126699/incidental-finding-of-single-coronary-artery-in-a-patient-with-alcoholic-cardiomyopathy-presenting-as-acute-heart-failure
#11
Patrick McNair, Erica Jones, Quynh Truong, Harsimran Singh
Single coronary artery is a rare clinical finding. Diagnosis is typically made incidentally after the patient presents with symptoms and undergoes coronary angiography, coronary computed tomography angiography (CTA), or post-mortem during autopsy. Several high-risk features of anomalous coronary arteries have been described in the literature. Our paper describes a case of dilated alcoholic cardiomyopathy presenting as heart failure with diagnostic workup incidentally revealing single coronary artery.
January 16, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28119214/comparison-between-mr-imaging-findings-of-intracranial-and-extracranial-schwannomas
#12
Tomohiro Ando, Hiroki Kato, Masayuki Matsuo
PURPOSE: To evaluate the differences of MR imaging findings between intracranial and extracranial schwannomas. METHODS: We retrospectively reviewed the MR images of 98 schwannomas and compared the imaging findings between intracranial and extracranial schwannomas. RESULTS: The number of intratumoral cysts was greater in intracranial than in extracranial schwannomas (4.8±7.2 vs 1.8±4.1; p<0.05). CONCLUSION: The number of intratumoral cysts was different between intracranial and extracranial schwannomas...
January 16, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28142086/the-implantable-loop-recorder-and-its-mammographic-appearance-a-case-based-approach
#13
Sharon Steinberger, Laurie R Margolies
The normal radiographic appearance of implantable loop recorders has been illustrated in the radiology literature; however, their mammographic appearance has not been described. Breast imagers should become familiar with the appearance of loop recorders in order to create an accurate report. In this paper we report 3 cases of patients with implantable loop recorders who underwent mammography. We describe the types and components of implantable loop recorders, indications for their placement, and their classic appearance on mammography...
January 15, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28131087/emergency-color-doppler-sonography-of-the-extremity-artery-a-pictorial-essay
#14
Kevin Mennitt, Madhvi Deol, Jing Gao
Arterial color duplex sonography (CDUS) of the extremities is routinely analyzed in the field of emergency radiology. A retrospective review of 500 consecutive arterial CDUS extremity studies was performed in our emergency department. Abnormal CDUS examinations were classified into two groups according to their primary etiology: 1) traumatic arterial injuries (accidents or post-operative complications) and 2) acute arterial ischemia (thrombosis or embolism outside of the setting of acute trauma). This article reviews common CDUS imaging findings in a busy emergency radiology division including traumatic pseudoaneurysm, secondary pseudoaneurysm, arteriovenous fistula, acute ischemic arterial disease and chronic peripheral arterial disease...
January 15, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28153667/quantitative-analysis-of-gadoxetic-acid-enhanced-magnetic-resonance-imaging-predicts-histological-grade-of-hepatocellular-carcinoma
#15
Hong-Fei Tong, Hong-Bo Liang, Zhi-Kang Mo, Tian-Pei Guan, Jian Yang, Chi-Hua Fang
OBJECTIVE: To confirm the histological grade of hepatocellular carcinoma (HCC) by gadoxetic acid-enhanced MRI. METHODS: Ninety-five HCC patients underwent gadoxetic acid-enhanced MRI before surgical intervention. The correlations among the signal absolute enhancement, contrast enhancement ratio (CER) and tumor histological grade were analyzed. RESULTS: The correlation between CER of tumor-to-liver and the grades of tumor differentiation is the most significant negative...
January 11, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28110202/choline-based-imaging-of-prostate-cancer-with-combined-18-f-fluorocholine-pet-and-1-h-mr-spectroscopy-by-means-of-integrated-pet-mri
#16
Axel Wetter, Johannes Grüneisen, Klaus Fliessbach, Susanne Lütje, Benedikt Schaarschmidt, Lale Umutlu
PURPOSE: To evaluate integrated PET/MRI/(1)H MR spectroscopy in patients with prostate cancer. SUBJECTS AND METHODS: Data analysis comprised calculations of correlations of standardized uptake values (SUVs) and ratios of (choline+creatine)/citrate as well as of single metabolite values and a logistic regression analysis of PET data and MR spectroscopy data in 22 patients. RESULTS: SUVmean and integral values of choline correlated significantly in tumors...
January 7, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28103513/interventional-radiology-in-the-management-of-thoracic-duct-injuries-anatomy-techniques-and-results
#17
REVIEW
Mohammad Toliyat, Kanwar Singh, Robert C Sibley, Murthy Chamarthy, Sanjeeva P Kalva, Anil K Pillai
Disruption of the thoracic duct can have devastating consequences and be associated with a high morbidity and mortality. Conservative therapies have been attempted to treat chylothorax without much success. Surgical management has traditionally been necessary to provide definitive treatment at the expense of increased morbidity. Lymphatic interventions have recently emerged as a new frontier for interventional radiologists to add value and provide minimally invasive therapies for debilitating conditions. The goal of this manuscript is to review the anatomy of the thoracic duct, describe various percutaneous techniques for accessing the duct, and briefly discuss outcomes as reported in the literature...
January 3, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28095361/axial-traction-magnetic-resonance-imaging-mri-of-the-glenohumeral-joint-in-healthy-volunteers-initial-experience
#18
Elisabeth R Garwood, Richard B Souza, Amy Zhang, Alan L Zhang, C Benjamin Ma, Thomas M Link, Daria Motamedi
OBJECTIVE: Evaluate technical feasibility and potential applications of glenohumeral (GH) joint axial traction magnetic resonance imaging (MRI) in healthy volunteers. MATERIALS AND METHODS: Eleven shoulders were imaged in neutral and with 4kg axial traction at 3T. Quantitative measurements were assessed. RESULTS: Axial traction was well tolerated. There was statistically significant widening of the superior GH joint space (p=0.002) and acromial angle (p=0...
January 3, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28135673/recurrent-extracranial-internal-carotid-artery-vasospasm-associated-with-recreational-marijuana-use
#19
Prasann Vachhani, Michael Phipps, Prashant Raghavan
No abstract text is available yet for this article.
December 29, 2016: Clinical Imaging
https://www.readbyqxmd.com/read/28107737/contrast-enhanced-spectral-mammography-cesm-versus-mri-in-the-high-risk-screening-setting-patient-preferences-and-attitudes
#20
Jordana Phillips, Matthew M Miller, Tejas S Mehta, Valerie Fein-Zachary, Audrey Nathanson, Wendy Hori, Rita Monahan-Earley, Priscilla J Slanetz
PURPOSE: Our study evaluates patient preferences toward screening CESM versus MRI. MATERIALS AND METHODS: As part of a prospective study, high-risk patients had breast MRI and CESM. Patients completed an anonymous survey to evaluate preferences regarding the two modalities. RESULTS: 88% of participants completed the survey. 79% preferred CESM over MRI if the exams had equal sensitivity. 89% would be comfortable receiving contrast as part of an annual screening test...
December 28, 2016: Clinical Imaging
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