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Clinical Imaging

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https://read.qxmd.com/read/31103908/propensity-matched-comparison-of-transjugular-intrahepatic-portosystemic-shunt-placement-techniques-intracardiac-echocardiography-ice-versus-fluoroscopic-guidance
#1
Raja Siva Ramaswamy, Resmi Charalel, Carlos J Guevara, Tatulya Tiwari, Olaguoke Akinwande, Seung K Kim, Amber Salter, Michael Darcy, Christopher D Malone
PURPOSE: To compare procedure characteristics and outcomes when TIPS is performed under intracardiac echocardiography guidance (iTIPS) compared to conventional fluoroscopic guidance (cTIPS). MATERIALS AND METHODS: A retrospective propensity-matched study of 30 iTIPS and 30 cTIPS procedures from January 2014 to March 2017 at a single US high volume academic medical center was performed. iTIPS and cTIPS cases were propensity score matched using predictive variables: age, race, gender, etiology of liver disease, indication for TIPS, MELD score, and portal vein patency...
May 11, 2019: Clinical Imaging
https://read.qxmd.com/read/31102780/factors-influencing-selection-of-an-interventional-radiology-training-program
#2
Raja S Ramaswamy, Daniel Fung, Tatulya Tiwari, Gretchen Foltz, Olaguoke Akinwande, Mahati Mokkarala, Seung Kim, Christopher Malone
PURPOSE: To understand factors influencing the choice and ranking of Interventional Radiology (IR) training programs among a cohort of medical students and diagnostic radiology residents pursuing careers in IR. MATERIALS AND METHODS: An IRB approved, 34 question online survey (surveymonkey.com) evaluated the impact of twenty-two different factors and demographics on IR training program selection for medical students and residents. The factors analyzed included programmatic features, location characteristics, academic reputation, program size, benefits/financial incentives, emphasis on clinical care, and future job opportunities...
May 11, 2019: Clinical Imaging
https://read.qxmd.com/read/31102777/ct-bone-density-analysis-of-low-impact-proximal-femur-fractures-using-hounsfield-units
#3
Anish Narayanan, Anthony Cai, Yin Xi, Naim M Maalouf, Craig Rubin, Avneesh Chhabra
AIM: To quantify and compare changes in bone mineral density (BMD) via CT analysis in patients with and without spontaneous femoral fractures. MATERIALS AND METHODS: Consecutive series of patients with CT imaging for spontaneous femoral fractures were compared to the age and gender matched controls. Bone density fixed region of interest measurements were obtained at the site of the fracture, proximally at the femoral head, and distally at the lesser trochanter in fracture patients and controls...
May 8, 2019: Clinical Imaging
https://read.qxmd.com/read/31078916/predictors-for-basal-ganglia-viability-after-mechanical-thrombectomy-in-proximal-middle-cerebral-artery-occlusion
#4
Marius Georg Kaschner, Raul Lande, Christian Rubbert, Julian Caspers, John-Ih Lee, Michael Gliem, Sebastian Jander, Bernd Turowski
BACKGROUND/PURPOSE: In acute proximal middle cerebral artery (MCA) occlusion covering the lenticulostriate arteries (LSA), ischemic tolerance of basal ganglia is limited due to supposed lack of collateral supply. However, in several patients, basal ganglia (BG) infarction was absent after successful mechanical thrombectomy (MTE). Purpose of our study was to evaluate predictors for BG viability in stroke patients despite prolonged MCA mainstem occlusion. MATERIAL/METHODS: We retrospectively reviewed all stroke patients from our local registry with MCA mainstem occlusion after mechanical thrombectomy between November 2009 and October 2016...
May 2, 2019: Clinical Imaging
https://read.qxmd.com/read/31078917/coronary-plaque-composition-assessed-by-cardiac-computed-tomography-using-adaptive-hounsfield-unit-thresholds
#5
Martina Chantal de Knegt, Morten Haugen, Andreas Kryger Jensen, Jesper James Linde, Jørgen Tobias Kühl, Jens Dahlgaard Hove, Klaus Fuglsang Kofoed
PURPOSE: Quantitative computed tomography (QCT) may be useful in detecting high-risk patients with coronary atherosclerosis. Assessment of plaque composition using fixed Hounsfield unit (HU) thresholds is influenced by luminal contrast density. A method using adaptive HU thresholds has therefore been developed. This study investigates agreement between plaque volumes derived using fixed and adaptive HU thresholds and the influence of luminal contrast density on the determination of plaque composition...
April 25, 2019: Clinical Imaging
https://read.qxmd.com/read/31102779/unilateral-cervical-and-petrosal-segment-agenesis-of-the-internal-carotid-artery-with-rete-mirabile
#6
Yasar Turk, Banu Alicioglu
The carotid rete mirabile (RM) is a physiological network between the internal and external carotid arterial systems. In this paper, an extremely rare case is presented, in which internal-external carotid artery anastomoses and a dilated ascending pharyngeal artery, due to unilateral agenesis of the cervical and petrous segments of the internal carotid artery (ICA), is presented.
April 23, 2019: Clinical Imaging
https://read.qxmd.com/read/31102778/role-of-cone-beam-ct-augmented-by-navigational-software-in-the-single-session-management-of-gastrointestinal-hemorrhage-and-infected-deep-postoperative-fluid-collections
#7
Joshua Cornman-Homonoff, David C Madoff
Utilization of cone-beam CT with navigational software augmentation allows performance of both vascular and nonvascular interventions in a traditional fluoroscopy suite without need for additional hardware. The improvements in target identification and procedure time associated with use of these technologies suggest that they may be particularly beneficial in emergent settings where decreased procedure time correlates with improved outcomes. We illustrate these potential advantages through the successful single-session management of a clinically unstable patient with both gastrointestinal (GI) hemorrhage and infected postoperative fluid collections...
April 23, 2019: Clinical Imaging
https://read.qxmd.com/read/31029011/the-clincoradiologic-spectrum-of-notochordal-derived-masses
#8
REVIEW
Samia K Sayyid, Philip K Wong, William Read, David K Monson, Monica Umpierrez, Felix Gonzalez, Aparna Kakarala, Adam D Singer
The notochord is an essential part of human development that regresses with age. Masses derived from notochordal tissue may be encountered during imaging of the neuroaxis. Fortunately, the majority of these are benign and can usually be differentiated by radiological and clinical findings. In this manuscript, we discuss the clinical and radiologic presentation of the four notochordal derived masses and present a brief overview of their management.
April 18, 2019: Clinical Imaging
https://read.qxmd.com/read/31029010/tumor-induced-osteomalacia-current-imaging-modalities-and-a-systematic-approach-for-tumor-localization
#9
REVIEW
Sampanna Jung Rayamajhi, Randy Yeh, Tony Wong, Shifali Dumeer, Bhagwant Rai Mittal, Fabrizio Remotti, Ijeuru Chikeka, Arun K Reddy
Paraneoplastic syndromes are symptom complexes that cannot be readily explained by local or distant spread of the tumor. They can occur due to hormone production, autoimmunity or other biologically active products produced by the tumor, etc. Tumor induced osteomalacia is a rare paraneoplastic syndrome in which the manifestation is mainly musculoskeletal such as bone pain, fractures and muscle weakness as a consequence of elaboration of fibroblast growth factor 23 (FGF23) by the tumor. Most of these tumors are solitary and small and hence localization of these tumors is often challenging...
April 17, 2019: Clinical Imaging
https://read.qxmd.com/read/31029009/anterior-spinal-artery-aneurysm-presenting-with-spinal-subarachnoid-hemorrhage-in-a-case-of-polyarteritis-nodosa
#10
Garrett Smith, Brian L Hoh, Mehmet S Albayram
Polyarteritis nodosa is characterized by presence of aneurysms in the renal, hepatic and mesenteric vasculature, and less often by vascular abnormalities in the intracranial compartment. Spinal subarachnoid hemorrhage is a rare phenomenon that can be associated with inflammatory vasculopathies such as polyarteritis nodosa, but the link between aneurysm formation and spinal subarachnoid hemorrhage in polyarteritis nodosa is unclear. We describe a case of a patient with polyarteritis nodosa and spinal subarachnoid hemorrhage following rupture of an aneurysm of the anterior spinal artery...
April 17, 2019: Clinical Imaging
https://read.qxmd.com/read/31121520/molecular-imaging-and-therapy-of-somatostatin-receptor-positive-tumors
#11
REVIEW
Jana Ivanidze, Michelle Roytman, Arielle Sasson, Myrto Skafida, Thomas J Fahey, Joseph R Osborne, Silvina P Dutruel
Somatostatin receptors (SSTR) are upregulated in the cells of origin that define numerous neuroendocrine neoplasms. PET imaging with 68 Ga-DOTATATE allows specific targeting of SSTR2A, a single species of SSTR receptor, which is commonly overexpressed in a variety of gastroenteropancreatic neuroendocrine tumors, as well as pulmonary carcinoid and head and neck tumors. Due to more specific targeting of SSTR2 as well as lower radiation dose, shorter study length, ability to quantify uptake, and lower cost, 68 Ga-DOTATATE has demonstrated superior imaging attributes when compared to 111 In-pentetreotide...
April 15, 2019: Clinical Imaging
https://read.qxmd.com/read/31030113/evaluation-of-a-novel-reconstruction-method-based-on-the-compressed-sensing-technique-application-to-cervical-spine-mr-imaging
#12
Yuki Takato, Hirofumi Hata, Yusuke Inoue, Keiji Matsunaga, Toshimasa Hara, Shotaro Komi, Ai Nakajima
Compressed sensing-based reconstruction (CSR) is a new magnetic resonance (MR) image reconstruction method based on the compressed sensing (CS) technique. CSR suppresses ringing artifacts from truncated k-space sampling by estimating the high spatial frequency information required to support the acquired k-space data. CSR is intended to replace the existing zero-fill interpolation (ZIP) reconstruction. We investigated the usefulness of the CSR technique by obtaining sagittal T2-weighted images of the cervical spine and phantom images using CSR or ZIP...
April 12, 2019: Clinical Imaging
https://read.qxmd.com/read/31026682/reference-parameters-for-left-ventricular-wall-thickness-thickening-and-motion-in-stress-myocardial-perfusion-ct-global-and-regional-assessment
#13
Young Hoon Cho, Joon-Won Kang, Seong Hoon Choi, Dong Hyun Yang, Tran Thi Xuan Anh, Eun-Seok Shin, Young-Hak Kim
PURPOSE: To use adenosine-induced stress CT myocardial perfusion imaging (CT-MPI) to determine normal reference values for left ventricle (LV) wall thickness (WT) and motion parameters. METHODS: This study included 106 Korean subjects (52 men and 54 women) who underwent CT-MPI due to chest pain, but were not found to have any detectable mild or severe coronary artery disease or myocardial perfusion defect. The following quantitative parameters were assessed on the CT-MPI according to a 17-segment model: LV myocardial thickness at end-systolic (WTES ) and end-diastolic (WTED ) phases, systolic wall thickening (SWT), and wall motion (WM)...
April 12, 2019: Clinical Imaging
https://read.qxmd.com/read/31026683/age-dependent-reference-values-of-the-thyroid-gland-in-pediatric-population-from-routine-computed-tomography-data
#14
Jin Hee Sea, Hye Ji, Sun Kyoung You, Jeong-Eun Lee, So Mi Lee, Hyun-Hae Cho
PURPOSE: To evaluate age-dependent reference values for measurements of the thyroid gland in pediatric patients. METHOD: In total 425 chest and neck computed tomography images of pediatric patients without pathology of the thyroid gland were retrospectively reviewed. Measurements of the thyroid gland were obtained in three dimensions (width, depth, length). The total volume was the sum of volumes of each lobe. Measurements were compared among the six groups according to age from 0 to 18 years...
April 9, 2019: Clinical Imaging
https://read.qxmd.com/read/31103907/enlarging-biopsy-proven-fibroadenoma-is-surgical-excision-necessary
#15
Vandana Dialani, Thanissara Chansakul, Kenny C Lai, Hannah Gilmore, Natalie Yvonne Sayegh, Priscilla J Slanetz
PURPOSE: Core biopsy-proven fibroadenomas that enlarge on clinical or imaging follow-up are often surgically excised to exclude an associated malignancy. The purpose of this study was to assess how often malignancy is detected upon excision, and to determine whether excision of enlarging, biopsy-proven, uncomplicated fibroadenomas is still warranted. MATERIALS AND METHODS: Review of our institutional pathology database from 2000 to 2010 identified 1117 cases of fibroadenoma, and retrospective chart review, including review of pathology and imaging findings of all these records, was performed...
April 4, 2019: Clinical Imaging
https://read.qxmd.com/read/30982701/correcting-a-decade-of-negative-news-about-mammography
#16
REVIEW
Elaine Schattner
No abstract text is available yet for this article.
April 4, 2019: Clinical Imaging
https://read.qxmd.com/read/31026684/impact-of-the-sampling-rate-of-dynamic-myocardial-computed-tomography-perfusion-on-the-quantitative-assessment-of-myocardial-blood-flow
#17
Takahiro Yokoi, Yuki Tanabe, Teruhito Kido, Akira Kurata, Tomoyuki Kido, Teruyoshi Uetani, Shuntaro Ikeda, Hironori Izutani, Masao Miyagawa, Teruhito Mochizuki
BACKGROUND: The relationship between shot-to-shot sampling rates for dynamic myocardial computed tomography perfusion (CTP) and robustness of CTP-derived myocardial blood flow (CT-MBF) is debatable. We retrospectively investigated the influence of a reduced sampling rate for dynamic CTP on CT-MBF computation and diagnostic performance for detecting myocardial perfusion abnormalities. METHODS: Pharmacological stress dynamic whole-heart CTP was performed in 120 patients suspected with coronary artery disease...
April 1, 2019: Clinical Imaging
https://read.qxmd.com/read/31030112/use-of-intravoxel-incoherent-motion-mr-imaging-to-assess-placental-perfusion-in-patients-with-placental-adhesion-disorder-on-their-third-trimester
#18
Tao Lu, Hong Pu, Wei Cui, Jie Mei, Meng-Wei Huang, Shao-Yu Wang
OBJECTIVE: Our primary aim was to investigate if women with placenta accreta can be differentiated with women without using IVIM quantitative assessment of the placental perfusion. A second aim was to investigate if IVIM parameters could be used to differentiate placenta accreta from increta. METHODS: The study population included 17 patients with placenta accreta, 29 patients with placenta increta and 16 patients without placenta accreta between 28 + 0 to 41 + 6 weeks...
March 30, 2019: Clinical Imaging
https://read.qxmd.com/read/30965204/peripatetic-carotid-artery-simulating-a-carotid-dissection-on-catheter-angiography-and-ct-angiography-a-case-report
#19
Andrew Zhang, Remy Lobo, Francisco Rivas-Rodriguez, Ashok Srinivasan
Retropharyngeal carotid arteries are a common clinically relevant anatomic variant. "Peripatetic" carotid arteries refer to change in position to and from a retropharyngeal location, and are a newly described finding. Knowledge of this phenomenon is important to avoid potential procedural complications as well as misdiagnosis. We present a unique case of a peripatetic carotid artery simulating a carotid artery dissection during a catheter angiogram and subsequent CT angiogram. To our knowledge, this has never been described in the medical literature...
March 30, 2019: Clinical Imaging
https://read.qxmd.com/read/30965182/combined-task-activation-display-as-an-effective-method-to-teach-introductory-fmri-users
#20
Ashwani Gore, Ranliang Hu, Dhruv Patel, Maria Braileanu, Daniel Hampton, Hena Joshi, Nikhar Kinger, Philip C Louden, John O'Keefe, Stanislav Poliashenko, Michael J Hoch
RATIONALE AND OBJECTIVES: Interpreting functional magnetic resonance imaging (fMRI) can be an overwhelming and challenging task for trainees, particularly when post processing, synthesizing and interpreting data from multiple language paradigms. Currently, there is no established best method for teaching fMRI interpretation to new trainees. The purpose of our study is to compare the use of combined task activation display (CTAD) and conventional display of fMRI language paradigms as an effective method to teach fMRI to the introductory learner...
March 29, 2019: Clinical Imaging
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